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利用静电纺丝技术得到较细的等规聚丙烯(iPP)纤维,然后将电纺纤维引入到处于过冷态的iPP基体中制备了均质复合体系.重点研究了电纺iPP纤维诱导成核能力.由于纤维和基体同质,所以它们具有完美的晶格匹配及良好的表面润湿性,使电纺iPP纤维有很强的诱导成核能力,且在160℃引入纤维时,界面主要形成α横晶.通过将所制得的复合体系在160℃松弛一段的时间,α横晶再次出现,表明横晶的形成与纤维引入时产生的剪切作用无关.将复合体系熔融再结晶时观察到有“记忆效应”产生,即在原生成横晶的部分区域仍生成横晶,其晶型与最初形成的横晶一致.
Electrospinning technology was used to obtain thin iPP fibers, and then the electrospun fibers were introduced into the iPP matrix in the supercooled state to prepare a homogeneous composite system.The emphases were made on the electrospinning iPP fibers induced nucleation Because of the homogeneity of the fibers and matrix, they have perfect lattice matching and good surface wettability, which make the electrospinning iPP fibers have a strong ability of inducing nucleation. When fibers are introduced at 160 ℃, the interface mainly forms α transgranular.After the relaxation of the prepared composite system at 160 ℃ for a period of time, α transgranular reappears, indicating that the transgranular formation has nothing to do with the shearing effect of fiber introduction.When the composite system is melted and recrystallized, To have “memory effect ” is generated, that is, in some areas of the original transgranular transgressions are still generated, the crystal form and the initial formation of Heng Jing consistent.