【摘要】 以超临界烯烃聚合为背景,在介绍超临界特征的基础上系统阐述了聚烯烃在超临界烷烃流体中的相行为。概括了聚烯烃内部结构包括种类、分子量和支化度,及超临界烷烃流体性质和第三组分的加入等对聚烯烃溶解度的影响。同时,比较了超临界烷烃流体对聚烯烃的溶胀特性及相应的熔点变化。更多还原

【Abstract】 With the background of supercritical olefins polymerization,The phase behavior of polyolefins in supercritical hydrocarbons was systemically introduced based on the characters of supercritical fluids.The effects of different polymer structure such as molecular weight,backbone branching on the phase behavior were generalized.Also,the effects of supercritical solvent quality and third component were introduced.Meantime,the solubility and diffusion of supercritical hydrocarbon in polyolefins were introduced and the impact of supercritical fluids on melting point of polymer was also included.更多还原