反式-／顺式-1，4-聚异戊二烯共混体系的结晶动力学

摘要

Isothermal and non⁃isothermal crystallization kinetics of cis⁃1,4⁃polyisoprene( CPI)/trans⁃1,4⁃pol⁃yisoprene( TPI) binary blends were investigated by differential scanning calorimetry method. The results were analyzed by Avrami equation and MO theory. It was found that the presence of CPI suppressed the crystalliza⁃tion rate of TPI component during both isothermal and non⁃isothermal crystallization. The crystallinity of TPI component was enhanced by CPI during the isothermal crystallization. For non⁃isothermal crystallization, the relative content ofβcrystal form increased, while the crystallinity of TPI component changed little with the in⁃corporation of CPI component.%采用差示扫描量热（ DSC）法对反式⁃／顺式⁃1，4⁃聚异戊二烯共混体系的等温及非等温结晶动力学进行了研究，分别采用Avrami方程和莫志深法对其动力学参数进行了解析。研究结果表明，在反式⁃／顺式⁃1，4⁃聚异戊二烯共混体系的等温及非等温结晶过程中，顺式⁃1，4⁃聚异戊二烯（ CPI）组分的存在会降低反式⁃1，4⁃聚异戊二烯（ TPI）组分的结晶速率；在等温结晶过程中， CPI组分会提高TPI组分自身的结晶度；而非等温结晶过程中， CPI则提高了共混物中β晶型的相对含量。