聚环氧乙烷(PE0)与聚双酚A羟基醚(PBHE)共混体系的研究

用偏光显微镜(PLM)、扭辫(TBA)、IR及WAXD对PEO/PBHE共混体系结晶形态进行了研究。结果表明,PEO含量在50％以上的共混体系,几乎完全被PEO球晶充满,非晶态PBHE作为微区分散在大球晶之间或球晶之中。PEO含量为40％和30％的照片上呈现树枝晶。PEO含量为20％以下时照片中不再看到结晶出现,PEO与PBHE形成单一非晶相。PEO/PBHE共混体系的组分之间存在着氢键相互作用,这种作用强于PBHE分子间的氢键作用。共混体系的结晶度及T_g随PBHE组分含量的增加,前者减小后者增加并符合FOX方程揭示的规律。PEO与PBHE具有很好的相容性。

PHASE STRUCTURE AND COMPATIBILITY STUDIES IN POLY (ETHYLENE OXIDE) (PEO)/POLY (HYDROXY ETHER) OF BISPHENOL A(PBHE) BLENDS

WAXD, PLM, IR and TBA have been used to investigate the morphology, crystallinity, Tg and intermolecular interaction of PEO/PBHE blends as a function of composition and temperature. Up to a content of about 50 wt% of PEO the blend films are completely filled with PEO spherulites, no separated domains of PBHE being observed. Blends with 30?40 wt% of PEO show islands of crystalline PEO within a matrix of PBHE. Blends with lower PEO content (20 wt%) show no evidence of crystallinity. A IR study of PEO PBHE blends reveals that intermolecular interaction occuring between these two polymeric components is stronger than that occuring in pure phenoxy. Decrease of crystallinity and increases of Tg in the blend system are accompanied by an increase in the content of PBHE composition, which is in good agreement with FOX equation. These two polymers are compatible in amorphous zone.