64加工与应用NO.022023塑料科技PlasticsScienceandTechnology高流动高刚抗冲共聚聚丙烯聚合工艺与结构和性能关系研究李丽,张鹏,唐婧,段宏义,邓守军（中国石油石油化工研究院兰州化工研究中心，甘肃兰州730060）摘要：采用两步法在Spheripol聚丙烯中试装置进行高流动高刚抗冲共聚聚丙烯中试开发，获得三种刚韧平衡的中试产品。对产品进行力学性能、乙烯含量、橡胶相含量、DSC测试，采用偏光显微镜（POM）、扫描电子显微镜（SEM）对结晶及脆断面形貌进行观察。结果表明：提高产品中乙烯含量、降低气相反应器中气相比和氢气/乙烯比、提高橡胶相的分子量、细化橡胶相尺寸、改善橡胶相的分散性，均有利于提高产品的冲击强度。降低橡胶相含量、细化球晶尺寸、提高产品结晶度，尤其是均聚部分的结晶度有利于提高产品刚性。降低中试气相比，将产品的乙烯含量控制在4.5%左右，橡胶相含量为9.5%左右，橡胶相尺寸为0.5μm左右，可获得刚韧平衡的高流动高刚抗冲共聚聚丙烯产品。关键词：高流动高刚抗冲共聚聚丙烯；乙烯含量；气相比；分子量；结晶度中图分类号：TQ325.1+4文献标识码：A文章编号：1005-3360（2023）02-0064-05DOI：10.15925/j.cnki.issn1005-3360.2023.02.013StudyonRelationshipbetweenPolymerizationProcessandStructureandPropertiesofPolypropyleneCopolymerwithHighFlow,HighRigidityandImpactResistanceLILi,ZHANGPeng,TANGJing,DUANHong-yi,DENGShou-jun(LanzhouPetrochemicalResearchCenter,PetrochemicalResearchInstitute,PetroChina,Lanzhou730060,China)Abstract:Thetwo-stepmethodwasusedintheSpheripolpolypropylenepilotplanttocarryoutthepilotdevelopmentofhigh-flowhigh-rigidityimpactpolypropylenecopolymer,andthreepilotproductswithrigid-toughbalancewereobtained.Themechanicalproperties,ethylenecontent,rubberphasecontentandDSCoftheproductweretested.Themorphologyofcrystallizationandbrittlefracturesurfacewasobservedbypolarizingmicroscope(POM)andscanningelectronmicroscope(SEM).Theresultsshowthatincreasingtheethylenecontentintheproduct,reducingthegasphaseratioandhydrogen/ethyleneratiointhegasphasereactor,increasingthemolecularweightoftherubberphase,refiningthesizeoftherubberphase,andimprovingthedispersionoftherubberphaseareallbeneficialtoimprovetheimpactstrengthoftheproduct...
