聚丙烯增韧改性的研究进展

Research progress on toughening modification of polypropylene

聚丙烯(PP)具有优异的机械、加工成型以及耐化学药品等性能,但它的冲击韧性较差,尤其在低温条件下脆性大,限制了它在某些对冲击韧性要求较高领域的进一步应用。综述了当前PP增韧改性方法的研究现状,包括化学改性和物理改性,并重点阐述通过结晶诱导PP生成β晶型增韧改性PP的方法。此外,针对PP增韧改性过程中存在的问题提出了意见和建议。

Polypropylene(PP) has excellent mechanical property,processing property,chemical resistance and so on. However,the poor impact toughness of PP,especially high fragility under low temperature conditions,limits further applications of PP in some areas where high impact toughness is required. The paper summarizes the current research status of toughening modification methods of PP from the aspects of chemical modification and physical modification,and emphasizes the current toughening modification method of PP by inducing PP to form β-crystal form. In addition,opinions and suggestions for solving problems of PP toughening modification are put forward.