摘要
用差示扫描量热法和光学解偏振法研究了热致液晶性芳香共聚酯与聚丙烯共混物的等温和非多温结晶行为.结果表明,这一热致液晶聚合物对聚丙烯结晶有诱导成核和加速作用.当共聚酯含量在2-5％之间时,聚丙烯的结晶速率最快.偏光显微镜的观察揭示出在聚丙烯熔体中原位形成的液晶聚合物微纤诱导了聚丙烯横穿晶的形成.
By means of differential scanning calorimetry(DSC) and depolarized light intensity me-thod(DLI), isothermal and non-isothermal crystallization of polyblends containing a thermo-tropic liquid crystalline copolyester and polypropylene has been investigated. It is shown that the crystallization of polypropylene is induced, nucleated and accelerated by this copolyester. The fastest crystallization rate is reached in the range of copolyester concentration between 2% and 5%. Polypropylene transcrystallines nucleate at the surface of liquid crystalline fibrils formed in-situ in polypropylene melt.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1992年第5期598-605,共8页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
热致液晶
聚合物
结晶
聚丙烯
Thermotropic liquid crystalline polymer, Polymer blends, Crystallization kinetics, Transcrystallization
