唑烷酮改性环氧树脂的性能

化工进展

唑烷酮改性环氧树脂的性能

黄丽1，2，石萌萌1，王成忠1，2

1北京化工大学材料科学与工程学院，北京 100029；2北京化工大学北京市水性聚合物合成与应用工程技术研究中心，北京 100029

出版日期:2013-10-05 发布日期:2013-10-14

Mechanical and thermal properties of oxazolidone modified epoxy resin

HUANG Li 1，2，SHI Mengmeng1，WANG Chengzhong 1，2

1School of Materials Sciences and Engineering，Beijing University of Chemical Technology，Beijing 100029，China; 2Beijing Engineering Research Center of Syntheses and Applications of Waterborne Polymers，Beijing University of Chemical Technology，Beijing 100029，China

Online:2013-10-05 Published:2013-10-14

摘要/Abstract

摘要： 采用4,4-二苯基甲烷二异氰酸酯（MDI）对双酚A环氧树脂和脂肪族环氧树脂进行唑烷酮化共改性，研究了MDI及作为活性稀释剂的脂肪族环氧用量对改性产物黏度及树脂固化物力学性能、耐热性的影响。结果表明，低改性比和稀释剂可以有效降低唑烷酮改性环氧树脂黏度，当改性比为4∶1时，树脂固化物拉伸强度、弯曲强度达到75.4 MPa和158.2 MPa，分别比环氧树脂固化物提高了64%和57%，断裂延伸率和冲击强度有较大提高，具有高强高韧的特点。稀释剂含量对Tg影响较小，各改性树脂Tg在108～118 ℃之间，与纯环氧树脂的耐热性相当。

关键词: 唑烷酮, 环氧树脂, 高强高韧

Abstract: Oxazolidone ring was introduced into epoxy resin by reacting 4,4’-diphenylmethane diisocyanate (MDI) with epoxy resin composed of bisphenol A epoxy resin and aliphatic epoxy resin. The viscosity of modified epoxy resin，mechanical and thermal properties of cured resin were studied by changing the content of aliphatic epoxy resin which was used as reactive diluent and MDI. The viscosity of oxazolidone modified epoxy resin could be reduced effectively when modification ratio was decreased and content of diluent was increased. When modification ratio was 4∶1，tensile strength and bending strength of cured resin reached 75.4 MPa and 158.2 MPa. The values were increased by 64% and 57% respectively compared with those of bisphenol A epoxy resin cured samples. Elongation and impact strength were also greatly improved. Oxazolidone modified epoxy resin exhibited high strength and toughness. Diluent content indicated a small influence on glass transition temperature (Tg). The Tg of oxazolidone modified epoxy resin was between 108 ℃ and 118 ℃. Oxazolidone modified epoxy resin possessed thermal resistance as bisphenol A epoxy resin.

Key words: oxazolidone, epoxy resin, high strength and toughness

黄丽1，2，石萌萌1，王成忠1，2. 唑烷酮改性环氧树脂的性能[J]. 化工进展.

HUANG Li 1，2，SHI Mengmeng1，WANG Chengzhong 1，2. Mechanical and thermal properties of oxazolidone modified epoxy resin[J]. Chemical Industry and Engineering Progree.

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