橡胶和树脂共混物的形态、相分离和动态力学行为
THE PHASE SEPERATION, MORPHOLOGY AND DYNAMICAL MECHANICS BEHAVIOR OF RUBBER AND RESIN BLENDS
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摘要: 无规羧基丁腈橡胶(CBN)和酚醛环氧树脂(F-51)在酸肝固化体系中具有较好的相容性,CBN橡胶从F-51树脂中的相分离析出较为困难;随着CBN含量的增大,橡胶和树脂以双相连续结构存在,这种半相容特征使CBN/F—51共混物的玻璃化转变峰被大大拓宽。实验发现:少量不含羧基官能团的丁腈橡胶(BN-26)添加到CBN/F-51共混体系后,能显著促进CBN橡胶从树脂中的相分离析出。Abstract: It ia difficult to coparate carboxyl-randomized butadiene acrylonitrile copolymer(CBN) from phenolic epoxy resin(F-51)in au anhydride curing system because of the food compatibility of CBN/F-51.With the increasing of the amount of CBN in the resin,the glass transition peak of the blend is widened greatly for the semi-compatible microstructure of the dual phase continuity.It is found that the phase separation of CBN from the resin is promoted evidently by adding small amount of butadiene acrylonitrile copolymer (BN-26) into the CBN/F-51 blend system.
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Key words:
- rubber/resin blend /
- phase separation /
- morphology /
- dynamic mechanical behavior
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