中国塑料2025，Vol.39Issue(2)：77-81,5.DOI:10.19491/j.issn.1001-9278.2025.02.014
钠-A型分子筛对PVC热稳定性能影响研究
Effect of sodium-A molecular sieve on heat stability of PVC
摘要
Abstract
The thermal stability of poly(vinyl chloride)(PVC)could be improved by a sodium-A molecular sieve accord-ing to the Congo red experiment.The static thermal stability time of the modified PVC was increased up to 72 min,which was better than that of pure PVC(7 min).The sodium-A molecular sieve was compounded with β-diketone,pen-taerythritol,phenyl diisooctyl phosphate and epoxidized soybean oil to obtain a compounding heat stabilizer.The static and dynamic thermal stability of the PVC stabilized with this compounding heat stabilizer was measured by using Congo red test paper,thermal aging oven,and torque rheometry methods,and its thermal weight loss was analyzed by thermo-gravimetry.The results indicated that the heat-stabilized PVC achieved the best thermal stabilization effect at a mass ratio of sodium-A molecular sieve to β-diketone of 1/1,exhibiting a static thermal stabilization time of 84 min,a dynamic ther-mal stabilization time of 1 137 s,a shortest plasticization time of 104 s,and a minimum equilibrium torque of 37.94 N·m.关键词
聚氯乙烯/钠-A型分子筛/热稳定剂Key words
poly(vinyl chloride)/sodium-A molecular sieve/heat stabilizer分类
化学化工引用本文复制引用
杨笑春,刘会媛,张青,于静..钠-A型分子筛对PVC热稳定性能影响研究[J].中国塑料,2025,39(2):77-81,5.基金项目
唐山师范学院基金项目(2022C43) （2022C43）
