详细信息

聚氨酯改性三官能团环氧树脂的性能    

Properties of Polyurethane Modified Trifunctional Epoxy Resin

文献类型:期刊文献

中文题名:聚氨酯改性三官能团环氧树脂的性能

英文题名:Properties of Polyurethane Modified Trifunctional Epoxy Resin

作者:张鸿飞[1];张德震[1];吕幸辉[1];王申春[1];王懿[1];陆士平[2]

机构:[1]华东理工大学材料科学与工程学院,上海200237;[2]上海富晨化工有限公司,上海200233

年份:2015

卷号:28

期号:2

起止页码:207

中文期刊名:功能高分子学报

外文期刊名:Journal of Functional Polymers

收录:CSTPCD;;北大核心:【北大核心2014】;CSCD:【CSCD2015_2016】;

语种:中文

中文关键词:环氧树脂;聚氨酯预聚体;改性

外文关键词:epoxy resin; polyurethane; modification

摘要:采用4,4'-二苯基甲烷二异氰酸酯(MDI)和聚乙二醇(PEG)为原料,制备端异氰酸酯基聚氨酯(PU)预聚体,用该预聚体对已合成的三官能度环氧树脂(TEP)进行改性。通过红外光谱分析(FT-IR)、扫描电镜(SEM)、热重分析(TG)和动态热力学分析(DMA)表征了交联物(TEP-PU)的基团变化、断面形貌、热性能和动态性能。研究表明:PU链段成功连接到TEP分子链上;当m(PU)∶m(TEP)=5%时,TEP-PU固化物的巴氏硬度为41.4HBa,冲击强度为23.32kJ/m2,玻璃化转变温度有明显提升,改性的TEP断面呈现韧性断裂。
4, 4'-diphenylmethane diisocyanate (MDI) and polyethylene glycol (PEG) were used as raw materials for synthesis of isocyanate terminated polyurethane (PU) pre-polymer. Then, PU pre-polymer was used to graft trifunctional epoxy resin (TEP) which was synthesis in lab to obtain cross-link TEP-PU. Fourier Transform Infrared spectroscopic analysis (FT-IR) , Scanning Electron Microscope (SEM), Thermogravimetric analysis (TG) and Dynamic Analysis of thermodynamics (DMA) were used to study postcured of TEP-PU groups changing, morphology thermal properties and dynamic mechanical properties respectively. Results indicated that PU chain grafted onto the TEP chain successfully. When rn(PU) : m(TEP) was 5%, the Barcol hardness was 41.4 HBa, impact strength was 23.32 kJ/m^2 , glass transition temperature was obviously improved, section of modified TEP presented ductile fracture.

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