Grupo de Polímeros

Comparing lignin and spent coffee grounds as bio-fillers in PLA 3D-printable filaments

Exploring the mechanical, rheological, and thermal performance of self-reinforced composites based on polyamides and multi-walled carbon nanotubes

Improving the 3D Printability and Mechanical Performance of Biorenewable Soybean Oil-Based Photocurable Resins.

Multifunctional nanocomposites based on a polyamide 6/polyamide 12 blend and multi-walled carbon nanotubes

Correlation between the electrical and thermal conductivity of acrylonitrile butadiene styrene composites with carbonaceous fillers with different dimensionality

Flexible thermoelectric energy harvesting system based on polymer composites

Green Bionanocomposites Based on Polyhydroxybutyrate and Filled with Cellulose Nanocrystals: Melting Processing and Characterization

Enhancement of 3D printability by FDM and electrical conductivity of PLA/MWCNT filaments using lignin as bio-dispersant

A comparison of para, meta, and ortho-carborane centred non-fullerene acceptors for organic solar cells

Impact of oxidation-induced ordering on the electrical and mechanical properties of a polythiophene coprocessed with bistriflimidic acid

Isosorbide plasticized corn starch filled with poly (3-hydroxybutyrate-co-3-hydroxyvalerate) microparticles: Properties and behavior under environmental factors

Donut-Shaped Microparticles Prepared from Different C¿Type Starch Sources: Characterization and Encapsulation of Gallic Acid

Last developments in polymers for wearable energy storage devices

Flexible 3D printed acrylic composites based on polyaniline/multiwalled carbon nanotubes for piezoresistive pressure sensors

Semi-paracrystallinity in semi-conducting polymers

Design Rules for Polymer Blends with High Thermoelectric Performance

Moving to e-Service Learning in Higher Education

Gold(III) Porphyrin Was Used as an Electron Acceptor for Efficient Organic Solar Cells

Effect of different plasticizers on thermal, crystalline, and permeability properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) films

Lignin as a High-Value Bioaditive in 3D-DLP Printable Acrylic Resins and Polyaniline Conductive Composite

Comparing the microstructure and photovoltaic performance of 3 perylene imide acceptors with similar energy levels but different packing tendencies

Photocurable printed piezocapacitive pressure sensor based on an acrylic resin modified with polyaniline and lignin

Correlating Acceptor Structure and Blend Nanostructure with the Photostability of Nonfullerene Organic Solar Cells

Polyethylene/ poly(3-hydroxybutyrate-co-3-hydroxyvalerate /carbon nanotube composites for eco-friendly electronic applications

Unraveling the Influence of the Preexisting Molecular Order on the Crystallization of Semiconducting Semicrystalline Poly(9,9-di-n-octylfluorenyl-2,7-diyl (PFO)

Preparation and characterization of bionanocomposite films based on wheat starch and reinforced with cellulose nanocrystals.

Influence of the hydrophilicity of montmorillonite on structure and properties of thermoplastic wheat starch/montmorillonite bionanocomposites

Crystallization-Induced Gelling as a Method to 4D Print Low-Water-Content Non-isocyanate Polyurethane Hydrogels

Study, measurement and mitigation of radon activity concentration in the School of Computer Science of the Universidade da Coruña in the North West of Spain

Y6 Organic Thin-Film Transistors with Electron Mobilities of 2.4 cm2 V-1 s-1 via Microstructural Tuning

Dense Matrix Multiplication Algorithms and Performance Evaluation of HPCC in 81 Nodes IBM Power 8 Architecture

Printability Study of a Conductive Polyaniline/Acrylic Formulation for 3D Printing

Polymorphism in Non-Fullerene Acceptors Based on Indacenodithienothiophene

Physical Aging Behavior of a Glassy Polyether

Photophysical and structural modulation of poly(3-hexylthiophene) nanoparticles via surfactant-polymer interaction

Influence of Backbone Curvature on the Organic Electrochemical Transistor Performance of Glycolated Donor-Acceptor Conjugated Polymers

Improving molecular alignment and charge percolation in semiconducting polymer films with highly localized electronic states through tailored thermal annealing

Towards a sustainable campus: working together to achieve the green campus flag on the UDC peripheral campus of Ferrol

Improvement of endothelial function by Gunnera tinctoria extract with antioxidant properties

A Novel Hydrocolloid Film Based on Pectin, Starch and Gunnera tinctoria and Ugni molinae Plant Extracts for Wound Dressing Applications

Experimental and Numerical Investigation of the Extrusion and Deposition Process of a Poly(lactic Acid) Strand with Fused Deposition Modeling

Service-Learning Projects in University Degrees Based on Sustainable Development Goals: Proposals and Results

Overexpression of ZePrx in Nicotiana tabacum Affects Lignin Biosynthesis Without Altering Redox Homeostasis

Photocured conductive PANI/acrylate composites for digital light processing. Influence of HDODA crosslinker in rheological and physicochemical properties

Properties and behavior under environmental factors of isosorbide-plasticized starch reinforced with microcrystalline cellulose biocomposites

Carrageenan-based physically crosslinked injectable hydrogel for woundhealing and tissue repairing applications

The Importance of Quantifying the Composition of the Amorphous Intermixed Phase in Organic Solar Cells

PHBV/CNC bionanocomposites processed by extrusion: Structural characterization and properties

Poly(hydroxybutyrate-co-hydroxyvalerate) microparticles embedded in k-carrageenan/locust bean gum hydrogel as a dual drug delivery carrier

Hydrocortisone loaded poly-(3-hydroxybutyrate-co-3-hydroxyvalerate) nanoparticles for topical ophthalmic administration: Preparation, characterization and evaluation of ophthalmic toxicity

Effect of the processing-induced morphology on the mechanical properties of biodegradable extruded films based on poly(lactic acid) (PLA) blends

Corn starch plasticized with isosorbide and filled with microcrystalline cellulose: processing and characterization

Poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/cellulosenanocrystal films: artificial weathering, humidityabsorption, water vapor transmission rate, antimicrobialactivity and biocompatibility

Equilibrios ácido-base: determinación de la constante de disociación del ácido acético mediante una práctica de laboratorio

Effects of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) microparticles on morphological, mechanical, thermal, and barrier properties in thermoplastic potato starch films

Piezoresistive polymer blends for electromechanical sensor applications

Starch edible films loaded with donut-shaped starch microparticles

Preparation of donut-shaped starch microparticles by aqueous-alcoholictreatment

Susceptibility of two co-existing mytilid species to simulated predation under projected climate change conditions

Starch films loaded with donut-shaped starch-quercetin microparticles: characterization and release kinetics

Preparation of starch nanoparticles loaded with quercetin usingnanoprecipitation technique

Role of rheology in tunning thermalconductivity of polyamide 12/polyamide 6composites with a segregated multiwalledcarbon nanotube network

Study of the structural order of native starch granules using combined FTIR and RXD analysis

Piezoresistive response of extruded polyaniline/(styrene-butadiene-styrene) polymer blends for force and deformation sensors

Entrapment of chitosan, pectin or ¿-carrageenan within methacrylate based hydrogels: Effect on swelling and mechanical properties

Novel Self-Reinforced Films Based on Poly (3-Hydroxybutyrate-Co-3-Hydroxyvalerate) (PHBV) and PHBV Microparticles

NovelSelf-ReinforcedFilms Based on Poly (3-Hydroxybutyrate-Co-3-Hydroxyvalerate) (PHBV) and PHBV Microparticles.

Influence of phase morphology on the rheology and thermal conductivity of HDPE/PA6 immiscible blends with alumina whiskers

Thermoelectric properties and intrinsic conduction processes in DBSA and NaSIPA doped polyanilines

Multifunctional electromechanical and thermoelectric polyaniline-poly(vinyl acetate) latex composites for wearable devices

Effect of Environmental Factors on Poly(3-hydroxybutyrateco-3-hydroxyvalerate) / Poly(butylene adipate-coterephthalate) / Montmorillonite Nanocomposites with antimicrobial agents

Preparation and characterization of nano and micro particles of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) via emulsification/solvent evaporation and nanoprecipitation techniques

Dielectric relaxation of near-percolated carbon nanofiber polypropylene composites

Morphological and structural changes of starch during processing by melt blending

Segregated Conductive Network of MWCNT in PA12/PA6 Composites: Electrical and Rheological Behaviour

Role of rheology in tunning thermal conductivity of polyamide 12/polyamide 6 composites with a segregated multiwalled carbon nanotube network

Effect of nanocellulose as a filler on biodegradable thermoplastic starch films from tuber, cereal and legume

Morphology, thermal and barrier properties of biodegradable films of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) containing cellulose nanocrystals

Cyclic temperature dependence of electrical conductivity in polyanilines as a function of the dopant and synthesis method

Chemical composition and thermal properties of Chilean Araucaria araucanastarch

Influence of polyamide ratio on the CNT dispersion in polyamide 66/6 blends by dilution of PA66 or PA6-MWCNT masterbatches

Improving the electrical properties of polyamide nanocomposites

Water sorption of PA12/PA6/MWCNT composites with a segregated conductive network: structure-property relationships

Water-compatible imprinted pills for sensitive determination of cannabinoids in urine and oral fluid

Synthesis and characterization of polyhydroxybutyrate-co-hydroxyvalerate nanoparticles for encapsulation of quercetin

La resolución de problemas como actividad en la docencia de la Química de los grados en Ingeniería Eléctrica y en Ingeniería Electrónica Industrial y Automática (Universidad de A Coruña, España) en el marco del Espacio Europeo de Educación Superior (EEES)

Processing and characterization of polyols plasticized-starch reinforced with microcrystalline cellulose

Migration kinetics of sorbic acid from polylactic acid and seaweed based films into food simulants

MALDI-TOF to compare polysaccharide profiles from commercial health supplements of different mushroom species

Polylactic acid and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) nano and microparticles for packaging bioplastic composites

Enhanced thermal conductivity of rheologically percolated carbon nanofiber reinforced polypropylene composites

Volatile phenols depletion in red wine using molecular imprinted polymers

Selective removal of ATP degradation products from food matrices II: Rapid screening of Hypoxanthine and Inosine by molecularly imprinted matrix solid-phase dispersion for evaluation of fish freshness

Selective removal of ATP degradation products from food matrices I: Design and characterization of a dummy molecularly imprinted specific sorbent for hypoxanthine

Accelerated Ageing of Styrene-Butadiene Rubber Nanocomposites Stabilized by Phenolic Antioxidant

Influence of the molecular weight of the modifier on the phase separation in an epoxy thermoset modified with a thermoplastic

Alumina Whisker Selection to Design Fiber-Reinforced Polyethylene Composites

Extruded polyaniline/EVA blends: Enhancing electrical conductivity using gallate compatibilizers

Fracture and thermal behaviour of biomass ash polypropylene composites

Plasticized Poly(lactic acid)-Poly(hydroxybutyrate) (PLA-PHB) Blends Incorporated with Catechin Intended for Active Food-Packaging Applications

Structure-fracture properties relationship for Polypropylene reinforced with fly ash with and without maleic anhydride functionalized isotactic Polypropylene as coupling agent

Assessing changes on poly(ethylene terephthalate) properties after recycling: Mechanical recycling in laboratory versus postconsumer recycled material

Morphology and Thermal Behavior of Poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/Poly(butylene adipate-co-terephathalate)/Clay Nanocomposites

Molecularly imprinted polymer for selective determination of ¿9-tetrahydrocannabinol and 11-nor-¿9-tetrahydrocannabinol carboxylic acid using LC-MS/MS in urine and oral fluid

Estudio de la espontaneidad y visualización de reacciones de oxidación-reducción (redox) sencillas en una práctica de laboratorio

Horse chestnut (Aesculus hippocastanum L.) starch: Basicphysico-chemical characteristics and use as thermoplastic material

Study of thermal and morphological properties of a hybrid system, iPP/POSS. Effect of flame retardance.

Flame retardancy and thermal stability of organic-inorganic hybrid resins based on polyhedral oligomeric silsesquioxanes and montmorillonite clay

Effect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene-butadiene-styrene composites for large strain sensor applications

Influence of the molecular weight of a modifier on the phase separation in an epoxy thermoset modified with a thermoplastic

Carbon Nanofiber Type and Content Dependence of the Physical Properties of Carbon Nanofiber Reinforced Polypropylene Composites

Toughening Strategies of Carbon Nanotube / Polycarbonate Composites with Electromagnetic Interference Shielding Properties

Effects of silane functionalization of alumina whiskers on high-density polyethylene composites

Poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/Clay Nanocomposites for Replacement of Mineral Oil Based Materials

Insight into industrial PLA aging process by complementary use of rheology, HPLC and MALDI

A study of competitive molecular interaction effects on imprinting of molecularly imprinted polymers

Interaction and Release of Catechin from Anhydride Maleic-Grafted Polypropylene Films

Enhancing polyamide properties with alumina whiskers

Polycarbonate nanocomposites for electromagnetic shielding

Co-existence of two mytilids in a heterogeneous environment: mortality, growth and strength of shell and byssus attachment

Piezoresistive response of carbon nanotubes-polyamides composites processed by extrusion

Rheological and Electrical Analysis in Carbon Nanofiber Reinforced Polypropylene Composites

Improving the capacity of polypropylene to be used in antioxidant active films: incorporation of plasticizer and natural antioxidants

Enhancing the Release of the Antioxidant Tocopherol from Polypropylene Films by Incorporating the Natural Plasticizers Lecithin, Olive Oil, or Sunflower Oil

From Spherical Micelles to Hexagonally Packed Cylinders: The Cure Cycle Determines Nanostructures Generated in Block Copolymer/Epoxy Blends

Insight into BPA-4-vinylpyridine interactions in molecularly imprinted polymers using complementary spectroscopy techniques

Co-existence of two mytilid species in a heterogeneous environment: mortality, growth and strength of shell and byssus attachment

Development of antioxidant active films containing tocopherols to extend the shelf life of fish

Analytical determination of flavonoids aimed to analysis of natural samples and active packaging applications

Immobilization of green tea extract on polypropylene films to control the antioxidant activity in food packaging

Epoxy/Anhydride Networks Modified With Polyhedral Oligomeric Silsesquioxanes

Rheology and thermal behavior of polyamide reinforced wiht alumina whiskers

Rheology and thermal behaviour of polyamide reinforced with alumina whiskers

Commercial biodegradable material for food contact: methodology for assessment of service life

Determination of polyolefin additives by reversed-phase liquid chromatography

Effect of PPG-PEG-PPG on the tocopherol controlled release from films intended for food packaging applications

An approach to assess the synergistic effect of natural antioxidants on the performance of the polypropylene stabilizing systems

Phase separation and morphology development in a thermoplastic-modified toughened epoxy

Nanoclay-Reinforced Poly(butylene adipate-coterephthalate)Biocomposites for Packaging Applications

Preparation, evaluation and characterization of quercetin-molecularly imprinted polymer for preconcentration and clean-up of catechins

Physical, chemical and mechanical properties of pehuen cellulosic husk and its pehuen-starch based composites

Processing and characterization of starch-based materials from pehuen seeds (Araucaria araucana (Mol) K. Koch)

Tensile and fracture behaviour of PP/wood flour composites

Exfoliated/intercalated silicate/hot styrene butadiene rubber nanocomposites: structure -properties relationship

Microstructure, Morphology, and Mechanical Properties of Styrene-Butadiene Rubber/Organoclay Nanocomposites

Impact of functional cross-linker on recognition properties of a Bisphenol-A imprinted polymer film for coating a Quartz Crystal Microbalance

Effect of Several Variables in the Polymer Toys Additive Migration to Saliva

Efficacy of Hindered Amines in Woodflour-Polypropylene Composites Compatibilized with Vinyltrimethoxysilane After Accelerated Weathering and Moisture Absorption

Natural Extracts as Potential Source of Antioxidants to Stabilize Polyolefins

An Approach to Imprint Irganox 1076: Potential Application to the Specific Migration Test in Olive Oil

Thermodynamic analysis of phase separation of a thermoplastic in a variant epoxy/monoamine-diamine system: influence of epoxy molecular structure

Synthesis and characterization of bisphenol-A imprinted polymer as a selective recognition receptor

Thermal behavior of blends based on a thermoplastic-modified epoxy resin with a crosslinking density variation

Effect of particle size and a processing aid on the crystallization and melting behavior of iPP/red pine wood flour composites

Simulation of molecular fractionation and species distributions in phase separation of polystyrene-modified epoxy/monoamine-diamine blends

Thermodynamic analysis of polymerization-induced phase separation of a polystyrene in epoxy/monoamine-diamine systems. Effect of monoamine-diamine proportion on the phase diagram

Development, validation and application of Micellar Electrokinetic Capillary Chromatography method for routine analysis of catechins, quercetin and thymol in natural samples

Effect of an epoxy-octasilsesquioxane on the thermodegradation of an epoxy/amine system

Study of the crosslink density, dynamo-mechanical behaviour and microstructure of hot and cold SBR vulcanizates

Monitorización de la degradación de aceites con sensores químicos y polímeros de impronta molecular

Oil degradation monitoring with chemical sensors and molecular imprinted polymer

Rheological, mechanical and thermal behaviour of wood polymer composites (WPC) based on recycled polypropylene

An Approach to Imprint Irganox 1076: Potential Application to the Specific Migration Test in Olive Oil

Effect of organoclay reinforcement on the curing characteristics and technological properties of SBR sulphur vulcanizates

Impact Fracture Behavior and Damage Mechanisms of PP/EVOH Blends Compatibilized with Ionomer Zn2+

Natural Extracts as Potential Source of Antioxidants to Stabilize Polyolefins

Rheological, thermal and mechanical characterization of fly ash-thermoplastic composites with different coupling agents

Liquid chromatography method to determine polyamines in thermosetting polymers

Epoxy resin modified with a thermoplastic. Influence of modifier and reaction temperature on the phase separation

Application of Liquid Chromatography in Polymer Non-Ionic Antistatic Additives Analysis

Liquid chromatographic methods to analyze hindered amines light stabilizers levels to improve the safety in polyolefins

Effect of aminomethoxy silane and olefin block copolymer on rheomechanical and morphological behavior of fly ash filled polypropylene composites

Effects of vinyltrimethoxy silane on mechanical properties and morphology of polypropylene-woodflour composites

Rheomechanical and morphological study of compatibilized PP/EVOH blends

Barrier and physical properties of Polypropylene/High-Barrier Ethylene-Vinyl Alcohol Copolymer Blends compatibilized with a sodium ionomer

Thermomechanical analysis of an epoxy-amine system modified with an octaepoxy-silsesquioxane

Influencia de la compatibilización sobre la actividad nucleante en mezclas de polipropileno y copolímero de etileno-alcohol vinílico

Deformation and fracture behavior of PP/ash composites

Application of FT-IR spectroscopy to determine transport properties and water-polymer interactions in polypropylene (PP)/ethylene alcohol vinyl (EVOH) films: effect of ethylene alcohol vinyl content a

Phase diagram of different epoxy-amine precursors modified with a thermoplastic. Effect of structure of epoxy-amine system on miscibility

Design of new polypropylene wood flour composites: processing and physical characterization

Polymer blends based on an epoxy-amine thermoset and a thermoplastic: Effect of thermoplastic on cure reaction and thermal stability of the system

Aspectos cinéticos de la cristalización isoterma del polipropileno isotáctico en sus mezclas con un copolímero de etileno-alcohol vinílico

Effects of vinyltrimethoxy silane on thermal properties and dynamic mechanical properties of polypropylene-woodflour composites

High-Performance Chromatography Analysis of ten Dyes for Control of Safety of Commercial Articles

Mechanism of Thermal Degradation of an Inorganic-Organic Hybrid Based in an Epoxy-POSS

Epoxy/POSS organic-inorganic hybrids. ATR-FTIR and DSC studies

Thermodynamic analysis of phase separation of a thermoplastic in the precursors of different epoxy-amine systems.

Experimental designs in the optimization of a microwave acid digestion procedure for the determination of metals in paper and board samples by atomic absorption spectrometry

Analysis of the isothermal crystallization of polypropylene/wood flour composites

Morphology of Different Epoxy-Amine Systems Modified with a Thermoplastic. Influence of Temperature, Thermoplastic Concentration and Molecular Structure of Epoxy Systems

Antioxidants Content and Migration from Commercial Polyethylene, Polypropylene and Polyvinyl Chloride Packagings

Development of an UPLC Method to Improve Additives Determination in Polymeric Materials

Organic/inorganic hybrid materials from an epoxy resin cured by an amine silsesquioxane

Study of an epoxy system cured with different diamines by differential scanning calorimetry

Dynamic crystallization of polypropylene and wood-based composites

Effect of Temperature and Type of Food Simulant on Antioxidant Stability

Mechanical and fracture behavior of Polypropylene/Poly(ethylene-co-vinyl alcohol) blends compatibilized with ionomer Na+.

FTIR Study on the Nature of Water Sorbed in Polypropylene (PP)/Ethylene Alcohol Vinyl (EVOH) Films

Phase diagram for a system of polydisperse components constituted by the precursor of an epoxy/diamine thermoset and a thermoplastic. Analysis based on a lattice theory model

Influence of the ethylene-methacrylic acid-Zn2+ ionomer on the thermal and mechanical properties of blends of poly(propylene) (PP)/ethylene-vinyl alcohol copolymer (EVOH)

Análisis de la cristalización dinámica de polipropileno isotáctico en presencia de ácido pimélico

Determination of antioxidants by solid-phase extraction method in aqueous food simulants

Deformation and fracture behavior of polypropylene-ethylene vinyl alcohol blends compatibilized with ionomer Zn2+.

Thermodynamic analysis of phase separation in an epoxy/polystyrene mixture

Multivariate analysis of the grande river waters (NW SPAIN)

Influence of the stretching in the crystallinity of Biaxially Oriented Polypropylene (BOPP) Films

Study of an octaepoxysilsesquioxane cured with a diamine

Thermodegradation kinetics of a hybrid inorganic-organic epoxy system

A study of the effect of ABS on the mechanical properties of an epoxy system.

Study of the effect of Poly (acrylonitrile-co-butadiene-co-styrene) on the mechanical properties of an epoxy system.

Extraction and quantification of. Antioxidants from low-density Polyethylene by microwave energy and liquid chromatography

Selection of a precursor of a monofunctional polyhedral oligomeric silsesquioxane reacted with aromatic diamines

Use of a sodium ionomer as compatibilizer in polypropylene/high-barrier ethylene-vinyl alcohol copolymer blends: Processability of the blends and their physical properties

Effects of a mixture of stabilizers on the structure and mechanical properties of polyethylene during reprocessing

Determination Of Antioxidant Migration Levels From Low-Density Polyethylene Films Into Food Simulants

Determination of chloriatriazines, methylthiotriazines and one methoxytriazine by SPE-LC-UV in water samples

Determinación de aniones mediante electroforesis capilar. Estado actual del tema

Epoxy Networks Containing Large Mass Fractions of a Monofunctional Polyhedral Oligomeric Silsesquioxane (POSS).

Thermal behaviour of a polyhedral oligomeric silsesquioxane with epoxy resins cured by diamines.

Kinetic of epoxy resin formation by high performance liquid chromatography.

Charectización of biaxially oriented polypropylene films by atomic force microscopy and microthermal analysis.

Blends of ABS with an epoxy/cycloaliphatic amine resin: phase separation behavior and morphologies

Isothermal curing by dynamic mechanical analysis of three epoxy resin systems: gelation and vitrification

Analysis of Blends of Poly (styrene-co-acrylonitrile) with and Epoxy/Aromatic Amine Resin Using Scanning Thermal Microscopy

Characterization of biaxially oriented polypropylene films by atomic force microscopy and micro thermal analysis

Dinamic mechanical analysis of an epoxy/thermoplastic blend: polymerización induced phase separation

Characterization of an ABS-modified epoxy system

Captación de Cd, Cr, Ni, Zn y Cu por Chlorella vulgaris en aguas residuales

Aplicación de los agentes complejantes AMEDT y ADTP a la determinación simultánea de cobre y cobalto por espectrofotometría derivada

Study of the physical aging of an epoxy/cycloaliphatic amine resing modified with ABS

Determinación of Triazines in water samples by high-performance liquid chromatography with diode-array detection

Effect of water sorption on the structure and the mechanical properties of an epoxy resin system.