An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness

Abstract With the aim to reduce the influence of flammability and brittleness of epoxy resin (EP) on its applications, a phosphorus‐containing oligomer (BID) containing phosphophenanthrene group and flexible chain segment is designed and applied to methyltetrahydrophthalic anhydride (MeTHPA) curing...

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Main Authors: Huijuan Zhao, Huajun Duan, Junjun Zhang, Lu Chen, Chao Wan, Chenhao Zhang, Chentao Liu, Huiru Ma
Format: Article
Language:English
Published: Wiley-VCH 2023-04-01
Series:Macromolecular Materials and Engineering
Subjects:
Online Access:https://doi.org/10.1002/mame.202200550
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author Huijuan Zhao
Huajun Duan
Junjun Zhang
Lu Chen
Chao Wan
Chenhao Zhang
Chentao Liu
Huiru Ma
author_facet Huijuan Zhao
Huajun Duan
Junjun Zhang
Lu Chen
Chao Wan
Chenhao Zhang
Chentao Liu
Huiru Ma
author_sort Huijuan Zhao
collection DOAJ
description Abstract With the aim to reduce the influence of flammability and brittleness of epoxy resin (EP) on its applications, a phosphorus‐containing oligomer (BID) containing phosphophenanthrene group and flexible chain segment is designed and applied to methyltetrahydrophthalic anhydride (MeTHPA) curing EP systems. Compared with EP/MeTHPA, the glass transition temperature (Tg) declines after introducing BID. But the addition of BID endows EP/MeTHPA with good flame retardancy. When the dosage is only 19.2 wt.%, the limiting oxygen index (LOI) of EP/BID/MeTHPA increases by 77% to 36% (P content: 1.5 wt.%) compared with EP and reaches the vertical combustion (UL‐94) V‐0 rating. Cone calorimetry (CC) results reveal that PHRR and THR drop by 40% and 31%. The pyrolytic process and char residue data analysis show that BID plays flame‐retardant role in gas phase and condensed phase. In addition, impact and flexural and tensile strength improve by 84%, 19% and 54% individually, proving that BID holds a potential on enhancing mechanical performance of EP/MeTHPA.
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spelling doaj.art-7c604ad29ffd46dea7bc14e7443ae7a22023-08-15T09:10:27ZengWiley-VCHMacromolecular Materials and Engineering1438-74921439-20542023-04-013084n/an/a10.1002/mame.202200550An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and ToughnessHuijuan Zhao0Huajun Duan1Junjun Zhang2Lu Chen3Chao Wan4Chenhao Zhang5Chentao Liu6Huiru Ma7School of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaSchool of Materials Science and Engineering Wuhan University of Technology Wuhan 430070 ChinaDepartment of Chemistry School of Chemistry Chemical Engineering and Life Science Wuhan University of Technology Wuhan 430070 ChinaAbstract With the aim to reduce the influence of flammability and brittleness of epoxy resin (EP) on its applications, a phosphorus‐containing oligomer (BID) containing phosphophenanthrene group and flexible chain segment is designed and applied to methyltetrahydrophthalic anhydride (MeTHPA) curing EP systems. Compared with EP/MeTHPA, the glass transition temperature (Tg) declines after introducing BID. But the addition of BID endows EP/MeTHPA with good flame retardancy. When the dosage is only 19.2 wt.%, the limiting oxygen index (LOI) of EP/BID/MeTHPA increases by 77% to 36% (P content: 1.5 wt.%) compared with EP and reaches the vertical combustion (UL‐94) V‐0 rating. Cone calorimetry (CC) results reveal that PHRR and THR drop by 40% and 31%. The pyrolytic process and char residue data analysis show that BID plays flame‐retardant role in gas phase and condensed phase. In addition, impact and flexural and tensile strength improve by 84%, 19% and 54% individually, proving that BID holds a potential on enhancing mechanical performance of EP/MeTHPA.https://doi.org/10.1002/mame.202200550anhydrideepoxy resinflame retardancyoligomerstoughening
spellingShingle Huijuan Zhao
Huajun Duan
Junjun Zhang
Lu Chen
Chao Wan
Chenhao Zhang
Chentao Liu
Huiru Ma
An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
Macromolecular Materials and Engineering
anhydride
epoxy resin
flame retardancy
oligomers
toughening
title An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
title_full An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
title_fullStr An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
title_full_unstemmed An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
title_short An Itaconic Acid‐Based Phosphorus‐Containing Oligomer Endowing Epoxy Resins with Good Flame Retardancy and Toughness
title_sort itaconic acid based phosphorus containing oligomer endowing epoxy resins with good flame retardancy and toughness
topic anhydride
epoxy resin
flame retardancy
oligomers
toughening
url https://doi.org/10.1002/mame.202200550
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