论文部分内容阅读
以马来酸酐,2,4-二羟基二苯甲酮(UV-0),2,2,6,6-四甲基哌啶醇(TMP)为原料,合成了中间体2,2,6,6-四甲基哌啶-2-羟基-二苯甲酮富马酸双酯(TMP-MF-UV-0)。在N_2保护下,以TMP-MF-UV-0,苯乙烯为原料,甲苯为溶剂,过氧化二苯甲酰为引发剂,通过溶液共聚法合成了一种复合型高分子光稳定剂哌啶醇-2-羟基-二苯甲酮富马酸双酯-苯乙烯共聚物P(TMP-MF-UV-0-co-St)。采用红外光谱(IR),紫外光谱(UV)对P(TMPMF-UV-0-co-St)进行了结构表征。将产物应用到聚氯乙烯(PVC)中,采用模压成型制成PVC片材,然后对其进行人工紫外加速老化试验。测试了添加该高分子光稳定剂的PVC片材老化前后的羧基指数与乙烯基指数,通过外观形貌观察研究了该光稳定剂的稳定化效果,并与UV-0和UV-531在PVC中的应用情况进行了对比,结果表明,P(TMP-MF-UV-0-co-St)具有优于低分子紫外光吸收剂UV-0与UV-531的综合效果。
The intermediates 2, 2, 6 were synthesized from maleic anhydride, 2,4-dihydroxybenzophenone (UV-0) and 2,2,6,6-tetramethylpiperidinol (TMP) , 6-tetramethylpiperidine-2-hydroxy-benzophenone fumarate (TMP-MF-UV-0). Under the protection of N 2, a complex polymeric light stabilizer, piperidine, was synthesized by solution copolymerization using TMP-MF-UV-0, styrene as raw material, toluene as solvent and dibenzoyl peroxide as initiator Hydroxy-benzophenone fumarate diester-styrene copolymer P (TMP-MF-UV-0-co-St). The structure of P (TMPMF-UV-0-co-St) was characterized by infrared spectroscopy (IR) and UV spectroscopy. The product is applied to polyvinyl chloride (PVC), the use of molded PVC sheet, and then artificial UV accelerated aging test. The carboxylate index and vinyl index of the PVC sheet before and after aging were tested. The stabilization effect of the photostabilizer was observed by appearance appearance. The effects of UV-0 and UV-531 on the PVC The results show that P (TMP-MF-UV-0-co-St) is better than the UV-0 and UV-531 low molecular weight UV absorbers.