不同厂家PVC树脂的性能对比

Properties comparison of PVC resins from different enterprises

对比了国内外3种优等品SG5型PVC树脂的白度、诱导时间、静态热老化性能、初期着色性、晶杂点(包括“鱼眼”)等性能。结果表明:①各项性能均为进口树脂C>国产树脂A>国产树脂B;②采用刚果红法测定PVC树脂的热稳定时间时,建议先用有机溶剂洗涤;③PVC树脂企业应制定更为贴近下游应用的性能评价方法。

The whiteness, induction time, static thermal aging property, initial dyeing property and crystal impurities ( including " fisheye") of three premium grade PVC-SG5 resins at home and abroad were compared. The results showed that all properties of the resins ranked in descending order were as follows: imported resin C , domestic resin A, domestic resin B. When the thermal stability time of PVC resins was determined by Congo red method, it was suggested that the resins should be washed by organic solvent first. PVC resin enterprises should formulate property evaluation methods closer to downstream application.