【作者】 陈凡； 李姜； 万芬； 郭少云；

【Author】 CHEN Fan,LI Jiang,WAN Fen,GUO Shaoyun (The State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu 610065)

【机构】 高分子材料与工程国家重点实验室,四川大学高分子研究所；

【摘要】 <正>在高速发展的纳米科技和微电子技术中,聚合物常被设计和制备成超薄及高度受限的层状结构,这使得对聚合物在变薄过程中结构与性能的研究变得十分重要。一般情况下,聚合物以常规方式进行结晶,分子链折叠后排入晶格形成10-20纳米厚的片晶,片晶堆叠分叉后最终形成球晶。而在二维受限条件下,尤其是当聚合物层厚达到接近片晶厚度的几十纳米时,更多还原

【Abstract】 The polypropylene/polyamide1010 multilayered films with different PP layers in thickness from 10 to 60 nm were prepared by multilayered coextrusion technology.The influence of two-dimensional confinement on the crystallization of PP was studied by DSC.It was indicated that growth of lamellar crystals was hampered by confinement,both melt temperature and crystallinity decreased with the PP layers’ thickness reducing.However,melt temperature and crystalinity unexpectedly increased as the multilayered structure was damaged.更多还原