熔体温度对聚丙烯注塑制品结晶和力学性能的影响  

Effect of Melt Temperature on the Crystallization and Mechanical Properties of Polypropylene Injection Product

作　　者：宋本生 辛勇[1] 

机构地区：[1]南昌大学机电工程学院,江西南昌330031

出　　处：《塑料工业》2016年第3期59-62,共4页China Plastics Industry

基　　金：国家自然科学基金资助项目(51365038);江西省科技支撑计划项目(20122BBE500044);江西省高校科技落地计划项目(KJLD12058);江西省研究生创新专项资金(YC2015-S058)

摘　　要：以聚丙烯平板注塑件为例,通过成型制样、X射线衍射试验、拉伸试验等方法研究熔体温度对制品的结晶和力学性能的影响规律,并分析其产生原因。X射线衍射试验结果表明,在熔体温度升高时,制品的结晶度呈现降低趋势,在温度达到210℃后该趋势变缓;晶粒尺寸则随着熔体温度的升高而增大。成型制品的拉伸试验结果表明,随着熔体温度的升高,屈服强度降低,断裂伸长率升高。With a polypropylene fiat injection part as an example, the effect of melt temperature on the crystallization and mechanical properties of polypropylene injection product was studied and the causes were analyzed by integrating practical experiments, X-ray diffraction analysis and tensile test. The X-ray diffraction test results show that the crystallinity of the product decreases with the increase in melt temperature, and the decreasing trend becomes slow at 210℃. On the other hand, the crystallite dimension increases with the increase of melt temperature. The tensile test results show that with the increase of melt temperature, the yield strength decreases, and the elongation at break increases.

关 键 词：聚丙烯 熔体温度 结晶度 晶粒尺寸 屈服强度 断裂伸长率 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]