Abstract: The chemical reactivity and network and properties after curing of diglycidyl ether of bisphenol A(DGEBA)/amine systems were studied using viscosity analysis,different scanning calorimetry analysis(DSC),thermogravimetric analysis and universal testing machine.using three different diluents,including 1,4-butanediol diglycidyl ether,phenyl glycidyl ether and decylglycide ether.The result showed that the addition of aromatic diluents PGE into DGEBA curing system accelerated the curing reaction to a certain extent,resulted in enhancement of tensile and flexural strength and modulus,but led to a reduction of both elongation and the impact strength.However,the addition of the other two diluents had the contrary effects on these properties and the DGE which had the longest fatty chain segment had the most obvious effects.All tested modified epoxy compositions had lower thermal stability than unmodified epoxy resin.- DOI:10.3969/j.issn.1000-1565.2016.06.007活性稀释剂对环氧树脂结构和性能的影响李山剑¹,邓双辉²,冯云龙²,刘超凡¹,刘坐镇^1,2(1.华东理工大学 材料科学与工程学院,特种功能高分子材料及相关技术教育部重点实验室,上海 200237;2.华东理工大学 华昌聚合物有限公司,上海防腐蚀新材料工程技术研究中心,上海 200237)摘 要:选用3种具有不同分子结构和官能度的缩水甘油醚——1,4-丁二醇二缩水甘油醚(BDDGE)、苯基缩水甘油醚(PGE)和癸基缩水甘油醚(DGE)作为活性稀释剂,通过黏度、DSC、热重分析和万能实验机等方法考察了其对双酚A环氧-胺固化体系的反应活性、交联网络结构和性能的影响.结果表明:芳香类稀释剂的加入,对环氧-胺固化体系的反应活性影响不大甚至有所提升,且固化物的强度和模量提高,韧性降低;而脂肪族稀释剂则明显降低了固化体系的反应活性,随着脂肪链长度的增加,固化物的强度和模量下降,韧性提高;3种稀释剂的加入均降低了环氧体系的耐热性能.关键词:环氧树脂;活性稀释剂;反应活性;交联结构;性能中图分类号:O631 文献标志码:A 文章编号:1000-1565(2016)06-0604-10Effects of reactive diluents type on chemical structure and property of epoxy resin systemLI Shanjian¹,DENG Shuanghui²,FENG Yunlong²,LIU Chaofan¹,LIU Zuozhen^1,2(1.Key Laboratory for Special Functional Polymers and Related Technology of Ministry of Education,School of Materials Science and Engineering,East China University of Science and Technology,Shanghai 200237; 2.Shanghai Engineering Research Center of New Anti-corrosion Materials,Sino Polymer Co Ltd,East ChinaUniversity of Science and Technology,Shanghai 200237,China)Abstract: The chemical reactivity and network and properties after curing of diglycidyl ether of bisphenol A(DGEBA)/amine systems were studied using viscosity analysis,different scanning calorimetry analysis(DSC),thermogravimetric analysis and universal testing machine.using three different diluents,including 1,4-butanediol diglycidyl ether,phenyl glycidyl ether and decylglycide ether.The result showed that the addition of aromatic diluents PGE into DGEBA curing system accelerated the curing reaction to a certain extent,resulted in enhancement of tensile and flexural strength and modulus,but led to a reduction of both elongation and the impact strength.However,the addition of the other two diluents had the contrary effects on these properties and the DGE which had the longest fatty chain segment had the most obvious effects.All tested modified epoxy compositions had lower thermal stability than unmodified epoxy resin.- 收稿日期:2016-07-01 基金项目:上海市重大科技攻关项目(12dz1100401);上海工程技术研究中心能力提升项目(13DZ2280900) 第一作者:李山剑(1992—),男,江苏如皋人,华东理工大学在读硕士研究生.E-mail:lsj262728@126.com 通信作者:刘坐镇(1965—),男,河南新密人,华东理工大学教授,主要从事热固性树脂及其复合材料的研究.E-mail:lzz@hchp.com.cn第6期李山剑等:活性稀释剂对环氧树脂结构和性能的影响

Key words: epoxy resin, diluent, chemical reactivity, network, property