CPE专用高密度聚乙烯树脂的开发

摘要

Special high density polyethylene (HDPE) resin for producing chlorinated polyethylene (CPE) was developed by optimizing polymerization parameters and selecting proper catalyst in a slurry polyethylene plant. The resin had similar relative molecular mass and its distribution to those products of the same kind. And the density of the resin was between those of the domestic resin A and imported resin B. The resin's crystallization temperature was close to that of the imported resin A, while its melt temperature and enthalpy were slightly higher than those of the imported resin A. The melt flow rate and bulk density of the resin were similar to those of the imported resin A. The resin's quantity of large particles and fine powder were less than those of the imported resins, and its particle diameter distribution was narrower than those of the imported resins. The pore diameter, pore volume and the specific surface area of the resin were close to those of the imported resin A. The properties of CPE articles produced from the special HDPE resin met the target requirements.%通过工艺条件的优化和催化剂的选型，在淤浆法聚乙烯装置上开发了氯化聚乙烯（CPE）专用高密度聚乙烯（HDPE）树脂。该CPE专用HDPE树脂与同类树脂的相对分子质量及其分布相当，密度介于国产树脂A和进口树脂B之间；结晶温度接近进口树脂A，但熔融温度及热焓较进口树脂A略高；熔体流动速率和堆密度与进口树脂A相差不大；大颗粒及细粉含量都少于进口树脂，且粒径分布更集中；孔径、孔容以及比表面积与进口树脂A接近。采用该CPE专用HDPE树脂生产的制品各项性能均达到了指标要求。