连续有序PP横晶在微纳层状受限空间里的构筑及其性能研究

项目名称： 连续有序PP横晶在微纳层状受限空间里的构筑及其性能研究

项目编号： No.51473103

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 李姜

作者单位： 四川大学

项目金额： 82万元

中文摘要： 在层状受限空间里构筑连续有序横晶是实现PP基微纳材料高性能和功能化的有效途径。本项目首次利用微纳层共挤出的限位效应将α或β成核剂定向分布在PP膜的特定区域，形成PP层和PP/成核剂层交替排列的连续层状结构，在层状受限空间里构筑连续有序的α或β横晶。深入研究α和β横晶在不同尺度层状受限空间（微米级到纳米级）里的结晶行为，实现PP横晶结构和形态的可调控。在此基础上，进一步研究α和β横晶的增强增韧机制，以及α和β横晶的气体阻隔性能和拉伸成孔性，制备高性能和功能化的PP基微纳材料。本申请项目针对PP横晶的研究的现状和发展趋势，围绕基本科学问题开展微纳层共挤出PP膜加工-结构-性能之间相互关系的研究，将为构筑连续有序PP横晶提供新思路和新方法、加深对PP横晶基本性质的理解、为实现PP基微纳材料的高性能和功能化提供新理论，具有重大的理论和现实意义。

中文关键词： 微纳层共挤出；成核剂；横晶；聚丙烯；受限空间

英文摘要： It has been well established that fabricating the successional and orderly transcrystallization in the confined layered space is one of simple and efficient approaches to achieve the high performance and multi-functional micro- and nano-materials based on polypropylene matrix. We firstly take advantage of the confinement effect of layer-multiplying coextrusion to compel α or β nucleating agent to be selectively distributed in the particular layer. In this multiplied composites, the alternating multilayer composites consist of polypropylene layer and nucleating agent filled-polypropylene layer, and numerous α or β-transcrystallization are generated in this particular confined layer. We aim to gain the tunable structure and morphology of PP- transcrystallization through deeply investigating the crystallization behavior of α or β-transcrystallization in different confined scale gap (micro-scale or nano-scale). Based on the above research, the reinforcement and toughening mechanism of α and β-transcrystallization and will be further probed. Also the behavior of gas barrier and microporous membrane by stretching will be investigated in order to attain the high performance and multi-functional micro- and nano-materials based on PP matrix. The project has been based on the current research and future development trend of PP transcrystallization. The fundamental investigation about the relationship among processing-structure-performance of PP films prepared by layer-multiplying coextrusion will be focused on the basic and key scientific issues. This research will offer a new meaningful idea and method to fabricate continues and orderly PP-transcrystallization, to deepen the fundamental understanding of the behavior of PP-transcrystallization, and to provide the novel theory in terms of high performance and multi-functional micro- and nano-materials based on PP matrix. We truly believe this research will be of great theoretical and practical significance.

英文关键词： micro- and nano-layer coextrusion;nucleating agent;transcrystalline;polypropylene;confined space