4-甲基丙烯酸-2,2,6,6-四甲基哌啶醇酯自由基共聚合的研究——Ⅲ.共聚物组成与竞聚率的测定

本文以苯为溶剂,在60±0.1℃下测定了MTMP(4-甲基丙烯酸-2,2,6,6-四甲基哌啶醇酯,M_1)与St(苯乙烯,M_2)、MVK(甲基乙烯酮,M_2)、VAc(醋酸乙烯酯,M_2)、AN(丙烯腈,M_2)的共聚物组成曲线与竞聚率(MTMP-St:r_1=0.30±0.05、r_2=0.63±0.05;MTMP-MVK:r_1=0.53±0.05、r_2=0.41±0.05;MTMP-VAc:r_1=14±0.5、r_2=0.02±0.01;MTMP-AN:r_1=13.7±0.5、r_2=0.20±0.05)。确定了MTMP的Q(0.56)和e(0.49)值。讨论了共聚物结构单元的序列分布。

STUDIES ON THE COPOLYMERIZATION OF 2,2,6,6-TETRAME-THYL-4-PIPERIDINYL-ACRYLATES(III)

The copolymerization of MTMP(2, 2, 6,6-tetramethyl-4-piperidinylmethacrylate, M1) with St(styrene, M2), MVK(Methylvinylketone, M2), AN(acrylonitrile, M2) and VAc (vinyl acetate, M2) was conducted in benzene at 60 ± 0.1℃ by using ABVN (or AIBN) as initiator. The composition curves of the copolymers and the monomer reactivity ratios of four pairs of monomers have been determined (MTMP-St: r1=0.30± 0.05, r2 = 0.63 ± 0.05; MTMP-MVK; r1 = 0.53 ± 0.05, r2 = 0.41 ± 0.05; MTMP-VAc: r1 = 14 ± 0.5, r2 = 0.02 ± 0.01; MTMP-AN: r1 = 13.7 ± 0.5, r2 = 0.20 ± 0.05). The Q(0.56) and e(0.49) values of MTMP have been calculated and the microstructure of the copolymer has been described.