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;硬脂酸钙和硬脂酸锌在180℃一起预热5 min后,协同作用得到增强,其动态热稳定时间约30 min,与进口钙/锌稳定剂相近;添加该复合热稳定剂的试样塑化流变性理想,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。
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 thermal stabilizer and functional assistant were 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 processability.
出处
《中国塑料》
CAS
CSCD
北大核心
2009年第11期85-88,共4页
China Plastics
关键词
聚氯乙烯
热稳定剂
协同作用
硬脂酸钙
硬脂酸锌
poly （vinyl chloride）
thermal stabilizer
synergistic effect
calcium stearate
zinc stearate
