β成核剂对PPR结晶行为的影响  

Effect of β Nucleating Agent on Crystallization Behavior of PPR

作　　者：张宝强 田瑶珠[2] Zhang Baoqiang;Tian Yaozhu(SINOPEC Great Wall Energy and Chemical(Guizhou)Co.,Ltd.,Guiyang,Guizhou,550008;School of Materials and Metallurgy,Guizhou University,Guiyang,Guizhou,550003)

机构地区：[1]中国石化长城能源化工(贵州)有限公司,贵州贵阳550008 [2]贵州大学材料与冶金学院,贵州贵阳550003

出　　处：《现代塑料加工应用》2021年第1期29-32,共4页Modern Plastics Processing and Applications

摘　　要：采用差示扫描量热仪(DSC)、X射线衍射仪(XRD)、偏光显微镜(PLM)研究了β成核剂对无规共聚聚丙烯(PPR)结晶行为及晶体结构的影响。结果表明:PPR中加入β成核剂后,PPR的晶体形态由α晶型向β晶型转变;当加入质量分数0.05%β成核剂时,β晶相对含量在60%以上,和纯PPR相比,PPR中β晶相对含量显著增加,且出现了双重熔融峰;加入β成核剂后,球晶尺寸变小,晶体形状改变;β成核剂加入量有适宜的范围,加入量过多反而降低β晶的成核能力。The crystallization behavior and crystal structure of β nucleating agent on random copolymer polypropylene(PPR) were studied by differential scanning calorimetry(DSC), X-ray diffraction(XRD) and polarizing microscope(PLM). The results show that the crystal form of PPR changes from α crystal to β crystal when β nucleating agent is added into PPR.The relative content of β crystal can reach more than 60% when the mass fraction of β nucleating agent is 0.05%,and compared with pure PPR, the relative content of β crystal in PPR increases significantly, and double melting peaks appear.The spherulite size becomes smaller and the crystal shape changes after β nucleating agent is added into PPR. The amount of β nucleating agent has a suitable range, and too much will reduce the nucleation ability of β crystal.

关 键 词：无规共聚聚丙烯 Β成核剂 结晶行为 Β晶型 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]