摘要
利用丙烯酸酯橡胶(ACM)提高热固性环氧树脂(EP)的韧性,系统研究共混体系固化条件对材料结构和性能的影响.研究表明,固化前环氧树脂与丙烯酸酯橡胶在整个组成范围内为均相体系,固化过程中两组份分子量不断增大,部分组成环氧树脂/丙烯酸酯橡胶共混体系(80/20及50/50)发生反应诱导相分离现象(RIPS).在发生反应诱导相分离的体系中,分相后的环氧树脂和丙烯酸酯橡胶两相彼此包含对方的组分,是一种不彻底的相分离.同时,固化后材料的结构与性能强烈依赖于所用固化条件(包括固化时间、固化温度及固化剂含量等).因此,可以通过调节体系固化条件实现对环氧树脂/丙烯酸酯橡胶共混体系结构和性能的调控.
An acrylic rubber（ACM） with epoxide groups has been used to improve the toughness of epoxy resins（EP） for the first time.The crosslink condition effects on the morphology and properties of the EP/ACM blends have been investigated systematically.It is found that the EP/ACM blends are miscible before the crosslinking over the whole composition ranges.In contrast,the reaction induced phase separation（RIPS） takes place for the EP/ACM=80/20 and 50/50 systems,while other blend systems maintain the homogeneous structure during the crosslink process.It was further found that the phase separation by the crosslinking led to the EP-rich and ACM-rich phases for the blend,indicating the each other inclusion structures for the RIPS systems.The co-crosslink of EP and ACM was also confirmed by the solvent etching experiments.Moreover,the phase structures and physical properties of the EP/ACM blends are much dependent upon the crosslink condition,which provides feasible access for manipulating the structure and properties of the EP/ACM blends.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2012年第11期1234-1242,共9页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号51173036
21074029)
浙江省创新团队项目(项目号2010R50017)资助
关键词
环氧树脂
丙烯酸酯橡胶
增韧
相结构
力学性能
Epoxy resins, Acrylic rubber, Toughening, Phase behaviors, Mechanical properties
作者简介
通讯联系人:李勇进,E-mail:yongjin-li@hznu.edu.cn
