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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。
1-propoxy-2,2,6,6-tetramethylpiperidinol and acryloyl chloride were used as raw materials to synthesize a polymerizable alkoxy-hindered amine 1-propoxy-4-acryloyloxy -2,2,6,6-tetramethylpiperidine (PNOR). PNOR and styrene were synthesized into high molecular weight alkoxy-hindered amines (PSNOR) by solution polymerization. Their structures were characterized by FTIR and 1H-NMR. The synthesized PSNOR and acrylonitrile - butadiene - styrene copolymer (ABS) blending, sample preparation, and accelerated aging experiments. The properties of spline before and after aging were analyzed by metallographic microscope and mechanical property tester. The results showed that the surface porosity of ABS / PSNOR was less than that of pure ABS after aging for 800 h, and the retention of tensile strength of ABS / PSNOR was 54.6%, higher than that of pure ABS by 28.6%. Therefore, PSNOR can effectively improve the light stability of ABS for a long time.