一种新型多元醇辅助热稳定剂的合成及性能研究

Synthesis and Performance Investigation of A Novel Polyol Co-stabilizer

以马来酸酐和三羟甲基氨基乙烷(Tris)为原料合成了一种新型多元醇化合物N-(1,1-二羟甲基-羟乙基)马来酰胺酸(MT),并将其用作硬聚氯乙烯(PVC)的辅助热稳定剂。静态老化和脱氯化氢实验研究表明:在延缓聚氯乙烯(PVC)试样初期变色和"锌烧"方面,硬脂酸锌(Zn St2)/MT复合体系较之Zn St_2/季戊四醇(PER)及Zn St_2/Tris复合体系具有明显优势。特别是在高锌比例下,即当Zn St_2/MT=1.2/0.3、0.9/0.6、0.6/0.9时,所制备PVC样品的"锌烧"时间分别达到80、130和240 min,均明显优于相应的Zn St_2/PER和Zn St_2/Tris体系。另外对于Zn St2/硬脂酸钙(Ca St_2)/多元醇体系,在高锌比例下(Zn St_2/Ca St_2=1.2/0、0.9/0.3、0.6/0.6),MT具有较之Tris更好的辅助热稳定效果。

A novel polyol compound, N-（1,1-hydroxymethyl-2-hydroxyethyl） maleamic acid（MT）, was synthesized using maleic anhydride and tris（hydroxymethyl） aminomethane（Tris）, and was investigated as an auxiliary thermal stabilizer for rigid poly（vinyl chloride）（PVC）. The results of static-aging and dehydrochlorination tests show that, MT is more effective a PVC co-stabilizer with long-term thermal stability than the typical polyol co-stabilizers（pentaerythritol（PER） and Tris）. The ＂zinc burning＂ time reach 80, 130 and 240 min with the mass ratios of zinc stearate（Zn St2）/MT ranging from 1.2/0.3 to 0.6/0.9, respectively. Moreover, MT is proved to be a costabilizer of long-term thermal stability for PVC in high Zn St2/calcium stearate（Ca St2） mass ratios（ranging from 1.2/0 to 0.6/0.6）.