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Improving the toughness of thermosetting epoxy resins via blending triblock copolymers

In this study, the triblock copolymer poly(methyl methacrylate)-b-poly(butyl acrylate)-b-poly(methyl methacrylate) (MAM) was used to modify bisphenol A epoxy resin to improve its toughness. The effects of MAM on the curing behaviors, mechanical properties, fracture morphology and thermal properties...

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Autores principales: Tao, Lei, Sun, Zeyu, Min, Wei, Ou, Hanwen, Qi, Liangliang, Yu, Muhuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9048288/
https://www.ncbi.nlm.nih.gov/pubmed/35494674
http://dx.doi.org/10.1039/c9ra09183a
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author Tao, Lei
Sun, Zeyu
Min, Wei
Ou, Hanwen
Qi, Liangliang
Yu, Muhuo
author_facet Tao, Lei
Sun, Zeyu
Min, Wei
Ou, Hanwen
Qi, Liangliang
Yu, Muhuo
author_sort Tao, Lei
collection PubMed
description In this study, the triblock copolymer poly(methyl methacrylate)-b-poly(butyl acrylate)-b-poly(methyl methacrylate) (MAM) was used to modify bisphenol A epoxy resin to improve its toughness. The effects of MAM on the curing behaviors, mechanical properties, fracture morphology and thermal properties of epoxy were carefully studied. The results of dissolution experiments show that MAM has good compatibility with epoxy resin under certain conditions. FT-IR and DSC analyses show that adding MAM to epoxy hinders the curing reaction of epoxy resin, without participating in the curing reaction and changing the curing mechanism. The mechanical properties indicated by K(IC) and impact strength with an MAM content of 10 phr for the toughened system increase by 91.5% and 83.5%, respectively, compared to the situation without MAM, which may ascribed to the nanoparticles formed during the process of MAM/epoxy blending. In the curing process of an epoxy resin, the typical phase structure that occurs through the self-assembly process can be clearly observed in the MAM/epoxy blends. As the MAM content increases, the amount of nanoparticles gradually increases. This work further confirms that the toughness of the composite material was enhanced to a large extent without significantly decreasing the glass transition temperature of the blends.
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spelling pubmed-90482882022-04-28 Improving the toughness of thermosetting epoxy resins via blending triblock copolymers Tao, Lei Sun, Zeyu Min, Wei Ou, Hanwen Qi, Liangliang Yu, Muhuo RSC Adv Chemistry In this study, the triblock copolymer poly(methyl methacrylate)-b-poly(butyl acrylate)-b-poly(methyl methacrylate) (MAM) was used to modify bisphenol A epoxy resin to improve its toughness. The effects of MAM on the curing behaviors, mechanical properties, fracture morphology and thermal properties of epoxy were carefully studied. The results of dissolution experiments show that MAM has good compatibility with epoxy resin under certain conditions. FT-IR and DSC analyses show that adding MAM to epoxy hinders the curing reaction of epoxy resin, without participating in the curing reaction and changing the curing mechanism. The mechanical properties indicated by K(IC) and impact strength with an MAM content of 10 phr for the toughened system increase by 91.5% and 83.5%, respectively, compared to the situation without MAM, which may ascribed to the nanoparticles formed during the process of MAM/epoxy blending. In the curing process of an epoxy resin, the typical phase structure that occurs through the self-assembly process can be clearly observed in the MAM/epoxy blends. As the MAM content increases, the amount of nanoparticles gradually increases. This work further confirms that the toughness of the composite material was enhanced to a large extent without significantly decreasing the glass transition temperature of the blends. The Royal Society of Chemistry 2020-01-08 /pmc/articles/PMC9048288/ /pubmed/35494674 http://dx.doi.org/10.1039/c9ra09183a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Tao, Lei
Sun, Zeyu
Min, Wei
Ou, Hanwen
Qi, Liangliang
Yu, Muhuo
Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title_full Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title_fullStr Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title_full_unstemmed Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title_short Improving the toughness of thermosetting epoxy resins via blending triblock copolymers
title_sort improving the toughness of thermosetting epoxy resins via blending triblock copolymers
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9048288/
https://www.ncbi.nlm.nih.gov/pubmed/35494674
http://dx.doi.org/10.1039/c9ra09183a
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