复合改性Mg-Al水滑石对PVC热稳定性的影响  

Effect of Composite Modified Mg-Al Hydrotalcite on the Thermal Stability of PVC

作　　者：周喜 袁浩坤 何鹏 向维望 蒋邵武 

机构地区：[1]邵阳学院食品与化学工程学院,湖南邵阳422000 [2]邵阳天堂助剂化工有限公司,湖南邵阳422002

出　　处：《邵阳学院学报（自然科学版）》2017年第5期50-56,共7页Journal of Shaoyang University：Natural Science Edition

基　　金：湖南省2017年度"百项专利转化推进计划"重点专利技术转化项目(201713)

摘　　要：采用共沉淀法制备改性Mg-Al水滑石,考察了单一表面改性剂对Mg-Al水滑石作为PVC热稳定剂的性能影响。在考察的表面改性剂中,聚乙二醇的改性效果较好,制备的改性Mg-Al水滑石具有较好的热稳定性能。在此基础上,采用转矩流变及静态热老化实验,考察了复合改性Mg-Al水滑石对PVC热稳定的性能。结果表明,以聚乙二醇与硬脂酸锌为复合改性剂,制备的复合改性Mg-Al水滑石既能较好的抑制PVC的初期着色,也具有优异的长期热稳定性能,可使PVC配混料的动态热稳定时间达到29min,静态热稳定时间约为70min。Mg-Al hydrotalcite was prepared by coprecipitation.Effect of single surface modifier on the dynamic thermal stability of Mg-Al hydrotalcite was also investigated.Among the investigated surface modifier, polyethylene glycol performed well property.And the corresponding modified Mg-Al hydrotalcite showed relatively better thermal stability.Furthermore,effect of composite modified Mg-Al hydrotalcite on the thermal stability of PVC was studied through torque rheology and static heat deterioration. As shown by the results, Mg-Al hydrotalcite modified by polyethylene glycol and zinc stearate Mg-Al hydrotalcite performed excellent property for the inhabitation of PVC initial coloration and long-term thermal stability.The dynamic thermal stability time of PVC reached 29 min,and the static thermal stability time was up to 70 min.

关 键 词：水滑石 复合改性 聚乙二醇 硬脂酸锌 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]