聚合物限域和预有序熔体的结晶行为及结构调控  

Crystallization Mechanism and Structure Control of Polymers in Confined Space and from Pre-ordered Melt

作　　者：初笑 闫寿科[1,2] 孙晓丽 Xiao Chu;Shou-ke Yan;Xiao-li Sun(College of Materials Science and Engineering,State Key Laboratory of Chemical Resource Engineering,Beijing University of Chemical Technology,Beijing 100029;Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science&Technology,Qingdao 266042)

机构地区：[1]北京化工大学材料科学与工程学院化工资源有效利用国家重点实验室,北京100029 [2]青岛科技大学橡塑材料与工程教育部重点实验室,青岛266042

出　　处：《高分子学报》2021年第6期634-645,I0004,共13页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号22022501)资助项目.

摘　　要：高分子物理领域的挑战性难题之一是调控高分子的结晶行为.高分子结构具有多尺度的特点,且易受到各种本征因素以及加工过程中引入的外场与受限作用的影响.高分子的结晶过程复杂多变,为避免最终产品性能的良莠不齐,促进高分子材料的实际生产和应用,需要建立高分子结构与性能的直接关系并实现对高分子结晶结构的精细化调控.本文以几种典型高分子为例,重点阐述了我们课题组在有关薄膜和纳米孔道构筑的限域空间与分子链预有序熔体对高分子结晶行为的影响、相关结晶结构调控机制以及结构-性能关系等方面的研究工作,阐明了聚合物多层次结构调控领域存在的科学问题,并展望了其未来发展方向.Polymer crystallization still remains one of the most important and challenging issues of polymer physics.As crystallization process of polymers is complex and variable under different conditions,it is necessary to establish the direct structure-property relationship of polymers and realize the purposeful crystalline structure regulation of polymers.Herein,taking several typical polymers as examples,we summarize the research progresses on the crystallization behavior and the multiscale structure control of semi-crystalline polymers.Based on the research work of our group,the emphasis of this feature article is especially focused on the crystallization and structure regulation of polymers in confined spaces,e.g.,in ultrathin film and nanoporous channels,and from preordered melts.The crystallization mechanism is discussed.In addition,challenging and scientific problems existing in the field of polymer crystallization and multiscale structure regulation,which may guide the future development direction of this field,have been described.

关 键 词：聚合物结晶 多层次结构调控 受限作用 熔体预有序 

分 类 号：O631.1[理学—高分子化学]