W U Maoying, HU Shuo, W A N G Lijun
(School of Chemical Engineering and Light Industry， Guangdong University of T echnology， Guangzhou 510006，China)
Abstract：Lubrication characteristics of polyethylene wax and calcium stearate ( CaSt2) for poly (vinyl chloride) (P V C ) were investigated by measuring plasticizing time with a torque rheometer. The results indicated that polyethylene wax acted an effective primary resin external lubricant for PV C , and CaSt2 acted as an effective secondary resin external lubricant. There was a significant synergistic effect when these two lubricants were combined. The external lubricating performance of polyethylene wax and its combination with CaSt2 was enhanced with an increase of total amount of two lubricants, in which the fraction of polyethylene wax was fixed as 1 phr. The lubrication mechanisms can be deduced as follow s：when the lubricant is used alone, polyethylene wax can spread over and wet the PVC particles to prevent them from contacting directly and friction with each other, but CaSt2 cannot wet PVC particles due to the formation of agglomerations and reverse micelles. On the other hand, the combination of these two lubricants can make CaSt2 dissolved slightly in polyethylene wax and then absorbed on the interface between PVC particles and polyethylene wax. A s a result, the direct contact and friction between the PVC particles can be prevented effectively. Key words ：poly (vinyl chloride) ；lubricant；polyethylene w ax；calcium steatate；resin lubrication； mechanism
〇 刖g p v c 是 重 要 的 通 用 塑 料 ，其 制 品 具 有 广 泛 的 用
收 稿 日 期 =2017-09-27 联 系 人 ，wum y@ gdut. edu. cn
用 量 约 1 份 ( 质 量 份 数 ，下 同 ）时发生走强转折; 推 测 A-C 6 1 7 A 和 CaSt2 对 P V C 的树脂外润滑作用机理为:单独使用
时 , A -C 6 1 7 A 可 铺 展 润 湿 P V C 粒子阻碍其直接相互接触和摩擦，而 CaSt2 形成团块或反胶束，不 能 润 湿 P V C 粒子;合
并使用时, 〇&312 可少量溶解于八- 0 617八并吸附于八- 0 617八- ? ¥ 0 粒子界面使其稳定性增强, 与八- 0 617八单独使用
相比,阻碍了 P V C 粒子直接相互接触和摩擦的效能提高。
关 键 词 ：聚氯乙烯; 润 滑 剂 ; 聚乙烯蜡; 硬 脂 酸 钙 ;树脂润滑作用;机理
中图分类号：T Q 325.3
文 献 标 识 码 ：B
文 章 编 号 =1001-9278(2018)01-0114-06
D O I：10. 19491/j. issn. 1001-9278. 2018. 01. 019
Lubrication Characteristics and Mechanism of Polyethylene Waw and Calcium Stearate for Poly (vinyl chloride)
摘 要 ：通过用转矩流变仪测试塑化时间研究了聚乙烯蜡八-C 617八、硬脂酸钙(CaSt2) 对 聚 氯 乙 烯 (P V C ) 的树脂润滑
特 性 ，结果表明, A -C 6 1 7 A 是一种有效的主效树脂外润滑剂而CaSt2 是一种有效的辅助树脂外润滑剂,两者并用具有
明显的协同效应, A-C 6 1 7 A 及 其 与 CaSt2 的并用体系的树脂外润滑性能随总用量的增大而增大的趋势均在A -C 617八
第 32卷 第 1 期 2018年 1 月
中国塑料
CHINA PLASTICS
Vol. 3 2 ，No. 1 J a n .,2018
聚 乙 烯 蜡 和 硬 脂 酸 钙 对 聚 氯 乙 ，汪立君
( 广东工业大学轻工化工学院，广 州 510006)