摘要
通过前期制备的乙烯基MQ硅树脂来对环氧树脂E44进行改性。根据对改性后产物的红外光谱分析、相对分子质量及分布的测定、环氧值测定,结果表明,乙烯基MQ硅树脂能与环氧树脂中的羟基发生反应,产物中大部分为环氧树脂的低聚物。通过对改性物的力学性能和耐热性能分析可知,与物理共混改性方法相比,化学共聚改性方法得到的产物具有相对较好的力学性能和较佳的耐热性能。当m(E-44)∶m(MQ)=50∶5时,经化学共聚改性后产物的拉伸强度达60.4 MPa、断裂伸长率达11.9%。当m(E-44)∶m(MQ)=50∶5时,改性后产物的玻璃化温度由改性前的153.0℃增加到168.5℃,玻璃化温度的提高,表明经化学共聚改性的环氧树脂耐热性能提高。
The epoxy resin was modified by MQ vinyl silicone resin which was prepared before. According to infrared spectra,the relative molecular mass and distribution,determination of the epoxy value by the method of hydrochloric acid-acetone,the performances of modified epoxy resin were investigated. The results showed MQ vinyl silicone resin can react with hydroxyl group of epoxy resin,most of the products were the epoxy resin oligomer. By analysis of the physical mechanical properties and heat resistance of the modified epoxy resin,and found the chemical copolymerization modification method was obviously superior to physical blending modification method. When m（ E-44） ∶ m（ MQ） = 50 ∶ 5,the tensile strength of the chemical copolymerization product was 60. 4 MPa,the elongation at break was 11. 9%. When m（ E-44） ∶m（ MQ） = 50∶ 5,the glass transition temperature of the chemical copolymerization product increased from153. 0 ℃ to 168. 5 ℃,while the glass transition temperature increased,which indicated that the heat resistance of epoxy resin modified by chemical copolymerization was improved.
出处
《应用化工》
CAS
CSCD
北大核心
2016年第3期511-514,524,共5页
Applied Chemical Industry
基金
2013年常州市大学生创新创业训练计划立项资助项目
关键词
乙烯基
MQ硅树脂
环氧树脂
改性
vinyl
MQ silicone resin
epoxy resin
modification
