抗氧剂在PVA熔融加工过程中的作用

摘要

选用了一种芳香胺类抗氧剂,并研究了此抗氧剂对聚乙烯醇(PVA)热稳定性的影响.通过用哈克密炼机、熔体流动速率仪、热重分析仪和双光束紫外可见光分光光度计对PVA的加工扭矩、熔体质量流动速率、热失重率以及PVA薄膜的透光率进行测试表征,证明了此抗氧剂对提高PVA的热稳定性效果明显.%In this paper, an arylamine antioxidant was chosen to improve thermo stability of PVA. The processing torque, melt index, thermal properties of PVA and the transmittance of PVA film were tested by torque rheometer, melt flow indexer and spectrophotometer. The results showed that the antioxidant was positive on improving the thermostability of PVA.