邹华维 徐 闻 冯庆芬
（高分子材料工程国家重点实验室，四川大学高分子研究所，四川，成都610065）
摘 要
本文旨在通过应力引发反应获得一种清洁、高效、操作简便的改善PVC加工性能的处理方法。采用SEM, FTIR, 粒度分析仪, GPC和力学性能测试等方法研究了磨盘碾磨对PVC的形态结构、塑化及力学性能的影响。实验结果表明，通过2-3分钟的碾磨处理，原始PVC树脂的形态被破坏，PVC粒子尺寸从130-160μm降低到1-50μm，分子量略有降低，分子量分布略为变窄；塑化时间从71-132 降到 31-3 秒，平衡扭矩从18.24-22.13降到14.67-18.28 Nm，PVC的加工性能得到明显改善，力学性能也有一定程度提高。
关键词：聚氯乙烯 应力引发反应 形态结构 加工性
Effect of Stress-Induced Reactions on Morphological Structure and Processability of PVC during Pan-Milling
HUAWEI ZOU, WEN XU, QINGFEN FENG
The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, Sichuan 610065, China
ABSTRACT
The effect of pan-milling on morphological structure, processability and properties of PVC was studied through SEM, FTIR, granulometer, GPC and mechanical properties test etc. in hopes of gaining an easy in operation, clean and efficient route for improving the processability of PVC through stress-induced reactions. The experimental results show that during pan-milling, within 2-3 minutes, the microcrystalline structure of PVC is disappeared, the grain size of PVC is reduced from 130-160μm to 1-50μm; the molecular weight of PVC is slightly decreased, its distribution however is narrowed; the plasticizing time and torque at balance drop down a great deal from 71-132 to 31-33 seconds and from 18.24-22.13 to 14.67-18.28 Nm respectively; the processability of PVC is markedly improved, the mechanical properties get enhanced also.
Key words: poly(vinyl chloride); stress-induced reaction; morphological structure; processability
