Influence of lanthanum stearate as a co-stabilizer on stabilization efficiency of calcium/zinc stabilizers to polyvinyl chloride

被引：134
作者：
Fang, Long [1 ]
Song, Yihu [1 ]
Zhu, Xiaonan [1 ]
Zheng, Qjang [1 ]
机构：
[1] Zhejiang Univ, Dept Polymer Sci & Engn, Key Lab Macromol Synth & Functionalizat, Minist Educ, Hangzhou 310027, Zhejiang, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2009年 / 94卷 / 05期
关键词：
Polyvinyl chloride (PVC); Calcium/zinc stabilizers; Lanthanum stearate; Co-stabilizer; POLY(VINYL CHLORIDE); THERMAL-DEGRADATION; VINYL-CHLORIDE; MECHANISM; POLYVINYL-CHLORIDE); PENTAERYTHRITOL; LIQUID;
D O I：
10.1016/j.polymdegradstab.2009.01.024
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Influence of lanthanum stearate (LaSt(3)) as a co-stabilizer on stabilization efficiency of calcium stearate (Ca)/zinc glutarate (Zn) stabilizers to polyvinyl chloride (PVC) at 180 degrees C in air was investigated. The results showed that combination of LaSt(3) with Ca/Zn stabilizers presented an obvious improvement of stabilization efficiency to PVC compared with the Ca/Zn stabilizers. Moreover, addition of LaSt(3) to the Ca/Zn stabilizers could significantly enhance static stability time of PVC. Incorporation of 2 phr LaSt(3) co-stabilizer to PVC containing 3 phr Ca/Zn stabilizers resulted in marked increase of onset degradation temperature and reductions in average degradation rate as well as the dynamic storage modulus (G') and loss modulus (G '') at 180 degrees C. Influence of Ca/Zn ratio on tensile strength of PVC in the absence or in the presence of LaSt(3) was discussed in detail. At low Ca/Zn ratios LaSt(3) had an obvious improvement in the tensile strength, while at high Ca/Zn ratios this effect became inconspicuous. (C) 2009 Published by Elsevier Ltd.
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页码：845 / 850
页数：6
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