摘要
用红外光谱(FTIR)研究了聚甲基丙烯酸甲酯(PMMA)与聚醋酸乙烯酯(PVAc)共混体系相容性,在160℃以上共混体系发生相分离;分相体系与非分相体系的FTIR谱明显不同;共混体系的FTIR谱不能从两统组分红外光谱简单加和得到;结果表明大分子构象发生了变化,PMMA/PVAc体系相容可能是大分子构象熵变所致。
Miscibility of poly(vinyl acetate) (PVAc)/poly(methyl mcthacrylate)(PMMA)has been studied by using FTIR. PMMA/PVAc reveal an lower critical solution tem-perature character. FTIR spactra of blend showed there are differences in spectra be-tween miscible blends and immiscible ones either preparaed by casting fromtetrahydrofran solution or phase separation. It is suggested that conformation changeswhich resulted from hydrogen bond interaction between two similar polymers and sol-vents in solution are involved in miscible blends.
出处
《功能高分子学报》
CAS
CSCD
1992年第4期287-291,共5页
Journal of Functional Polymers
基金
国家自然科学基金
