高熔体强度聚丙烯中长支链结构的分析与表征方法新进展  

New progress in analysis and characterization of long chain branched structure in high melt strength polypropylene

作　　者：崔崑[1] 黄晋[1] 赵巧玲[1] 马志[1] CUI Kun;HUANG Jin;ZHAO Qiaoling;MA Zhi(Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences,Shanghai 200032,China)

机构地区：[1]中国科学院上海有机化学研究所,上海200032

出　　处：《化工进展》2022年第10期5425-5440,共16页Chemical Industry and Engineering Progress

摘　　要：高熔体强度聚丙烯(high melt strength polypropylene,HMSPP)是具有较高熔体强度和弹性、在熔融拉伸时存在应变硬化现象的一种新型聚丙烯材料。近年来,对长支链(LCB)型HMSPP(LCB-HMSPP)的研发引起了学术界和工业界的广泛关注。在利用各种方法和工艺制备LCB-HMSPP之后,所得聚合物是否具有长支链结构,长支链的化学组成、密度及链长度等拓扑结构信息,都需要通过各种仪器分析与表征方法对其进行定性或定量验证。本文着重对傅里叶变换红外光谱(FTIR)法、核磁共振碳谱(C NMR)法、凝胶渗透色谱(GPC)及其联用方法、流变学表征法和结晶行为表征法在LCB-HMSPP中LCB链结构分析与表征中的研究新进展进行总结和评述,介绍了这些方法各自的优缺点和适用性并对这些方法进行了对比,最后对用于LCB-HMSPP中LCB链结构的分析与表征方法研究的未来发展及应用前景进行了展望。High melt strength polypropylene(HMSPP) is a new kind of polypropylene material with high melt strength, elasticity and strain hardening during melt stretching. In recent years, the research and development of long chain branched(LCB) HMSPP(LCB-HMSPP) has attracted extensive attention in both academia and industry. After preparing LCB-HMSPP via various methods and processes, whether the obtained polymer has long chain branched structure, and the topological structure information such as chemical composition, density and chain length of long chain branch need to be qualitatively or quantitatively verified by various instrumental analysis and characterization methods. The new progress in the analysis and characterization of LCB structures in HMSPP by Fourier transform infrared spectroscopy(FTIR), nuclear magnetic resonance spectroscopy(C NMR), gel permeation chromatography(GPC) and its combined methods, rheology and crystallization behavior characterization, were summarized and reviewed. The advantages, shortcomings and applicability of these methods were introduced and compared. Finally, the future development and application of the analysis and characterization methods of LCB chain structure in LCB-HMSPP were prospected.

关 键 词：高熔体强度聚丙烯 长支链 傅里叶变换红外光谱 核磁共振 凝胶渗透色谱 流变学 结晶 

分 类 号：O631.6[理学—高分子化学]