透明聚丙烯的结构及结晶行为  

Structures and Crystallization Behaviors of Transparent Polypropylene

作　　者：丁其维 韩晓倩 李海艳 袁文博 王倩 刘永欣 赵治明 DING Qiwei;HAN Xiaoqian;LI Haiyan;YUAN Wenbo;WANG Qian;LIU Yongxin;ZHAO Zhiming(Shandong Chambroad Polyolefin Performance Material Co.,Ltd.,Binzhou 256500,China;Shandong Chambroad Petrochemicals Co.,Ltd.,Binzhou 256500,China)

机构地区：[1]山东京博聚烯烃新材料有限公司,山东滨州256500 [2]山东京博石油化工有限公司,山东滨州256500

出　　处：《塑料工业》2024年第7期126-130,共5页China Plastics Industry

摘　　要：采用凝胶渗透色谱仪(GPC)、核磁共振波谱仪(NMR)、X射线衍射仪(XRD)、偏光显微镜(PLM)和差示扫描量热仪(DSC)等分析手段,研究了京博聚烯烃公司生产的透明聚丙烯产品RP340R及市场上进口的同类产品RP344RK的结构、结晶形态和结晶行为。结果表明,RP340R和RP344RK的序列结构接近,均为共聚单体为少量乙烯的无规共聚聚丙烯;晶型均为α晶型,球晶尺寸细化程度明显;随着冷却速率的升高,起始结晶温度、峰值结晶温度均降低,而结晶速率加快。与RP340R相比,RP344RK的相对分子质量分布较宽,非等温冷结晶活化能较小。The structures,crystallization morphologies and crystallization behaviors of the transparent polypropylene product RP340R produced by the chambroad polyolefin company and the imported similar product RP344RK were studied by the gel permeation chromatography(GPC),nuclear magnetic resonance(NMR),X-ray diffraction(XRD),polarized light microscope(PLM)and differential scanning calorimeter(DSC).The results indicate that the sequence structures of RP340R and RP344RK are similar.Both of them are random polypropylene copolymers containing a small amount of ethylene comonomer.Their crystal forms areαform and the spherulite sizes are obviously refined.With the increase of cooling rate,the initial crystallization temperature and the peak crystallization temperature decrease,but the crystallization rate increases.Compared with RP340R,RP344RK has a wider relative molecular mass distribution and a smaller activation energy of non-isothermal cold crystallization.

关 键 词：透明聚丙烯 结构 结晶形态 结晶行为 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]