【作者】 亢健； 杨锋； 李惠林； 曹亚； 向明；

【Author】 Jian Kang,Feng Yang,Huilin Li,Ya Cao~*,Ming Xiang~* (The State Key Laboratory of Polymer Materials Engineering,Polymer Research Institute of Sichuan University,Chengdu 610065)

【机构】 高分子材料工程国家重点实验室四川大学高分子研究所；

【摘要】 <正>等规聚丙烯（iPP）的平均等规度高低和等规度分布情况是决定iPP的加工性能和使用性能的重要参数。目前表征iPP等规度分布情况的常规方法有溶液分级法、TREF、CRYSTAF以及高分辨率¹³C NMR,然而,它们的测试时间长、需要耗费大量溶剂,而且需要专门的设备,测试成本高,实用性较差。工业上急需快速、高效的表征方法为生产调控提供准确的分子结构信息。更多还原

【Abstract】 This study is devoted to investigate the tacticity distribution of isotactic polypropylene （iPP） using successive self-nucleation and annealing（SSA） to provide quick and detailed analysis for the manufacturing process.Samples studied were polymerized with the same Ziegler-Natta catalyst but varying TEAL/DONOR ratios.Conventional measurements,high resolution ¹³C NMR and temperature rising elution fractionation（TREF） were performed and information about the degree and distribution of tacticity was obtained.However,these measurements are not practical in industrial manufacturing due to their disadvantages.Here,detailed and additional structural information of iPP was obtained by the use of SSA fractionation,which was in agreement with the conventional measurements.Moreover,SSA is more time-saving and practical,which is an effective method in characterizing the tacticity distribution of iPP and enables quick analysis for industrial applications.更多还原