摘要
利用差示扫描量热仪(DSC)和光学显微镜(OM)研究了苯乙烯-丙烯腈共聚物(SAN)用量以及反应温度对环氧树脂(EP)/SAN共混物反应诱导相分离的影响。同时,详细介绍了一种计算浊点转化率的方法。结果发现:不同SAN用量的EP/SAN体系最终形成了不同的相结构,而适量SAN的添加可使体系发生黏弹相分离,且反应温度越高,体系固化前相分离的程度越高。通过计算浊点转化率,可确定该EP/SAN体系为上临界会溶温度(UCST)体系。此外,体系反应诱导相分离时间与温度的依赖关系遵循Arrhenius方程,由该方程得到的体系分相活化能(Ea,ps)与SAN用量无关。
By using of differential scanning calorimetry（DSC） and optical microscope（OM） analysis, the effects of styrene-acrylonitrile copolymer（SAN） content and curing temperature on reactioninduced phase separation of epoxy resin（EP）/SAN blends were studied. Meanwhile, a method to calculate conversion of cloud point was introduced. The results show that： the EP/SAN blends with different SAN content build various kinds of phase structures and viscoelastic phase separation may occur in a proper range of SAN content, and higher temperature would be beneficial to the phase separation before curing of the EP/SAN blends. The EP/SAN blending system is confirmed as upper critical solution temperature（UCST） system by calculating the conversion of cloud point. In addition, the dependence between the induced phase separation time and temperature of the system follows Arrhenius equation, and the phase separation activation energy（Ea,ps）, which obtained by this equation, shows no relationship with SAN content.
出处
《塑料科技》
CAS
北大核心
2015年第7期45-51,共7页
Plastics Science and Technology
