中国塑料 ›› 2009, Vol. 23 ›› Issue (11): 85-88 .DOI: 10.19491/j.issn.1001-9278.2009.11.017

• 助剂 • 上一篇    下一篇

硬质PVC用新型钙/锌复合热稳定剂的研究

杨云翠 亢小丽 朱小军 袁 荃 武六旺   

  1. 太原市塑料研究所
  • 收稿日期:2009-07-10 修回日期:2009-10-10 出版日期:2009-11-26 发布日期:2009-11-26

Study on a Novel Ca/Zn Compound Thermal Stabilizer for Rigid PVC

  

  • Received:2009-07-10 Revised:2009-10-10 Online:2009-11-26 Published:2009-11-26

摘要: 采用变色法对硬质聚氯乙烯(PVC)用钙/锌复合热稳定剂的主体、有机辅助稳定剂、功能助剂之间的协同作用进行了研究,得到了硬质PVC用新型高效钙/锌复合热稳定剂的实用配方,并与4种市售稳定剂进行了静态、动态热稳定性比较。结果表明,材料的初期色泽和长期热稳定性主要决定于硬脂酸钙与硬脂酸锌的比例,调整比例可以使其性能有一定程度的改善;钙和锌的硬脂酸盐180 ℃一同预热5 min后,协同作用得到增强;该复合热稳定剂塑化流变性理想,可以在不改变加工工艺及配方的条件下等量替代其他几种热稳定剂;动态热稳定时间约30 min,与进口钙锌稳定剂相近。

关键词: 聚氯乙烯, 热稳定剂, 协同作用, 硬脂酸钙, 硬脂酸锌

Abstract: In this paper,the thermal stabilizer of Ca/Zn system for rigid PVC was studied by static and dynamic experiments and compared with four commercial ones. Its synergistic effect with organic auxiliary heat stabilizer and functional assistant was determined. It was found that the initial color and long-term thermal stability depended mainly on the ratio of calcium and zinc stearates. When the two stearates were heated at 180 ℃ for 5 minutes, the synergistic effect was enhanced and a dynamic thermal stabilizing time of 30 min was observed. PVC materials containing such stabilizing system possessed good processablity.

Key words: poly(vinyl chloride), thermal stability, synergistic effect, calcium stearate, zinc stearate