二烷基锡聚合物的研究——Ⅲ.顺丁烯二酸二丁基锡酯与丙烯酸甲酯、丙烯酸丁酯的共聚合

STUDIES ON THE DIALKYLTIN POLYMERS III. COPOLYMERIZATION OF DIBUTYLTIN MALEATE WITH METHYL ACRYLATE AND BUTYL ACRYLATE

近年来,新的有机锡聚合物的合成及其在许多领域内的应用研究取得很大的进展,然而,侧链上带有有机锡基团的二烷(芳)基锡聚合物的研究报道较少。众所周知,二烷基锡化合物是一类重要的聚氯乙烯热稳定剂。制备对聚氯乙烯具有改性作用的有机锡共聚合型热稳定剂,以实现聚氯乙烯热稳定剂的高分子化和多功能化,是未来热稳定剂的发展方向之一。我们已研究了顺丁烯二酸二丁基锡酯分别与苯乙烯、甲基丙烯酸甲酯的共聚反应及其共聚物对聚氯乙烯热稳定性的影响。本文报道顺丁烯二酸二丁基锡酯分别与丙烯酸甲酯、丙烯酸丁酯的共聚反应。

Benzoyl peroxide (BPO) was used for initiator in copolymerization of dibutyltin maleate (DBTM, M2) with methyl acrylate (MA, M1) in benzene and the reactivity ratios of copolymerization r1 and r2 were found to be 12.67 and 0.03, respectively. But in copolymerization of DBTM (M2) with butyl acrylate (BA, M1) r1 and r2 were 11.1 and 0> respectively. The cc-polymerization conditions, such as amount of initiator, ratios of monomers and addition method of initiator were examined. Copolymers were characterized by 1H-NMR, IR, elemental and TG analyses. MA-DBTM copolymer is a white and brittle solid, while BA-DBTM copolymer is a transparent elastomer at room temperature.