中国塑料 ›› 2012, Vol. 26 ›› Issue (09): 88-92 .DOI: 10.19491/j.issn.1001-9278.2012.09.019

• 加工与应用 • 上一篇    下一篇

硬脂酸镧/己二酸钙/己二酸锌复合热稳定剂对聚氯乙烯性能的影响

刘孝谦 高俊刚 杨建波 张保发   

  1. 河北大学化学与环境科学学院 河北大学 河北大学化学与环境科学学院 河北精信化工集团有限公司
  • 收稿日期:2012-04-05 修回日期:1900-01-01 出版日期:2012-09-26 发布日期:2012-09-26

Influences of Lanthanum Stearate/Calcium Adipate/Zinc Adipate Costabilizer on Thermal Stability of PVC

Xiaoqian Liu GAO Jun-Gang Jianbo Yang Baofa Zang   

  • Received:2012-04-05 Revised:1900-01-01 Online:2012-09-26 Published:2012-09-26
  • Contact: GAO Jun-Gang

摘要: 为提高聚氯乙烯加工热稳定剂的功能,合成并复配制成一种新型硬脂酸镧/己二酸钙/己二酸锌复合热稳定剂。利用热重分析仪、平板流变仪、动态力学谱仪等对聚氯乙烯热稳定性(刚果红法)、力学性能、流变性能、动态力学性能等进行了研究。结果表明,当己二酸钙与己二酸锌的质量比为1∶4 时,聚氯乙烯的热稳定时间最长;当加入硬脂酸镧且己二酸钙与己二酸锌的质量比为2∶3时,聚氯乙烯的热稳定时间由原来的86 min提高到135 min,冲击强度提高了30 %;加入硬脂酸镧降低了聚氯乙烯的储能模量、损耗模量和损耗因子。

关键词: 聚氯乙烯, 复合热稳定剂, 己二酸钙, 己二酸锌, 硬脂酸镧, 刚果红法

Abstract: In order to improve the thermal stability of PVC, a novel organic calcium/zinc stabilizer was prepared from calcium adipate and zinc adipate and use lanthanum stearate as a costabilizer. Influences of Ca/Zn ratios and lanthanum stearate on the thermal stability of PVC were studied. Congo red testing method, thermogravimetric analysis, dynamic rheology, dynamic mechanical analysis, and mechanical property were determined. When Ca/Zn mass ratio was 1/4, the Congo red time reached the maximum time of 86 min. When lanthanum stearate was added and the mass ratio of Ca/Zn was 2/3, the Congo red time reached the maximum of 135 min, and the impact strength of the sample was increased by 30 %. However, the introduction of lanthanum stearate decreased the storage modulus, loss modulus, and tanδ of PVC.

Key words: Polyvinyl chloride, co-stabilizer, Calcium adipate, Zinc adipate, Lanthanum stearate, congo red method

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