鄒華維 徐 聞 馮慶芬
（高分子材料工程國(guó)家重點(diǎn)實(shí)驗(yàn)室，四川大學(xué)高分子研究所，四川，成都610065）
摘 要
本文旨在通過(guò)應(yīng)力引發(fā)反應(yīng)獲得一種清潔、高效、操作簡(jiǎn)便的改善PVC加工性能的處理方法。采用SEM, FTIR, 粒度分析儀, GPC和力學(xué)性能測(cè)試等方法研究了磨盤(pán)碾磨對(duì)PVC的形態(tài)結(jié)構(gòu)、塑化及力學(xué)性能的影響。實(shí)驗(yàn)結(jié)果表明，通過(guò)2-3分鐘的碾磨處理，原始PVC樹(shù)脂的形態(tài)被破壞，PVC粒子尺寸從130-160μm降低到1-50μm，分子量略有降低，分子量分布略為變窄；塑化時(shí)間從71-132 降到 31-3 秒，平衡扭矩從18.24-22.13降到14.67-18.28 Nm，PVC的加工性能得到明顯改善，力學(xué)性能也有一定程度提高。
關(guān)鍵詞：聚氯乙烯 應(yīng)力引發(fā)反應(yīng) 形態(tài)結(jié)構(gòu) 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
