聚丙烯釜内合金的相态研究  

Morphology of Polypropylene in-Reactor Alloys

作　　者：郭艳[1] 彭波[2] 张春雨[3] 张学全[3] 

机构地区：[1]南京大学现代工程与应用科学学院,南京210093 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022 [3]中国科学院长春应用化学研究所中国科学院合成橡胶重点实验室,长春130022

出　　处：《化学进展》2015年第12期1815-1821,共7页Progress in Chemistry

基　　金：国家自然科学基金项目(No.51303169;21404106);石油化工联合基金(No.U1462124)资助~~

摘　　要：聚丙烯釜内合金具有良好的刚韧平衡性能,历经30多年的发展,在包装、汽车和建筑等领域已得到广泛的应用。其优异的性能及复杂的多相、多组分结构更是引起了相关领域研究者的高度关注。聚丙烯釜内合金是一种在聚合釜内直接合成的多相、多组分聚合物体系,其初始产品常以粉末或球型颗粒的状态存在,具有非常复杂的相形态,并且在加工成型过程中,由于相形态的演变会形成更加丰富的微结构,从而对聚丙烯釜内合金最终的力学性能产生决定性的影响。目前对于聚丙烯釜内合金体系的分子链结构-聚集态结构-产品性能之间的构效关系仍然有很多问题亟待解决。近期研究表明在某些情况下,聚丙烯釜内合金体系中增韧相形成"核-壳"型结构(或多重"核-壳"型结构)时,可以实现最佳的刚性与韧性的平衡,但对于这些"核-壳"结构形成条件的控制及结构成分的精确测定仍有不足。本文主要总结了近年来聚丙烯釜内合金相态研究的进展,展望了该领域可能的发展方向。Over the past three decades,polypropylene in-reactor alloys have been widely used in various fields such as packaging,automotive and construction due to their excellent mechanical properties and good impact resistance. These excellent properties are derived from their complicated compositions and phase structures,which have attracted significant research interest in recent years. Polypropylene in-reactor alloy is a multicomponent system containing PP homopolymer, ethylene-propylene random copolymer（ EPR） and ethylene-propylene block copolymers with different sequence lengths（ EbP）. These complex components form multiphase in the polypropylene in-reactor products. The original products are in the forms of powers or particles and have complicated morphology. After the processing,polypropylene in-reactor alloys will form abundance microstructures which have crucial influence on the impact strength of the final product. However, the relationship between molecular structures,morphology and properties of the product are still not well understood.For example,it was found that the formation of core-shell structure lead to the best balance of rigidity and toughness. However,studies on the formation condition and the composition of the core-shell structure are still limited. In the present review,we aim to highlight the recent progress in the studies on the morphology of polypropylene in-reactor alloys,and the prospective tendency of this field is proposed.

关 键 词：聚丙烯釜内合金 相形态 结晶 

分 类 号：O631.11[理学—高分子化学] TQ325.1[理学—化学]