一种氮烷氧基受阻胺的合成及其在ABS中的应用

Synthesis of N-Alkoxyoxy Hindered Amine and Its Application in ABS

以1-丙氧基-2,2,6,6-四甲基哌啶醇与丙烯酰氯为原料合成了可聚合型氮烷氧基受阻胺—1-丙氧基-4-丙烯酰氧基-2,2,6,6-四甲基哌啶(PNOR)。采用溶液聚合法将PNOR和苯乙烯合成为高分子量氮烷氧基受阻胺(PSNOR),并用红外光谱(FTIR)、核磁共振氢谱(1H-NMR)对其结构进行了表征。将所合成的PSNOR与丙烯腈-丁二烯-苯乙烯共聚物(ABS)共混、制样,并进行加速老化实验。采用金相显微镜、力学性能测试仪对样条老化前后的性能进行了分析。结果表明:老化800 h后,ABS/PSNOR表面孔洞比纯ABS少,且ABS/PSNOR的拉伸强度保留率为54.6%,高于纯ABS的28.6%。因此,PSNOR能长期有效地提高ABS的光稳定性。

A polymerizable N-alkoxyoxy hindered amine light stabilizer 1-propoxy-2,2,6,6- tetramethylpiperidine-4-yl acrylate （PNOR）was synthesized through transesterification of 1-propoxy-2,2,6,6-tetramethylpiperidine-4-ol with acryloyl chloride. A high molecular weight N-alkoxyoxy hindered amine （PSNOR） was prepared by solution polymerization from styrene and PNOR. The analysis of FTIR and ^1H-NMR shows that PNOR monomer and PSNOR were successfully prepared. Furthermore, the obtained PSNOR was melt-blended with ABS. Metallographic microscopy and mechanical properties were employed to characterize ABS blends before and after UV irradiation. The results show that the number of surface cracks for ABS/ PSNOR is less than that of ABS, the percentage retention of tensile strength of ABS/PSNOR is 54.6%, which is higher than that of ABS（28.6%）. Therefore, it could conclude that PSNOR can significantly improve the long-term UV stability of ABS.