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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >Novel Copolymers of Trisubstituted Ethylenes and Styrene. 3. Alkyl and Alkoxy Ring-Substituted Ethyl 2-Cyano-1-oxo-3-phenyl-2-propenylcarbamates
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Novel Copolymers of Trisubstituted Ethylenes and Styrene. 3. Alkyl and Alkoxy Ring-Substituted Ethyl 2-Cyano-1-oxo-3-phenyl-2-propenylcarbamates

机译：三取代乙烯和苯乙烯的新型共聚物。 3.烷基和烷氧基取代的2-氰基-1-氧代-3-氧苯基-丙烯基氨基甲酸乙酯

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摘要

Electrophilic trisubstituted ethylenes, alkyl and alkoxy ring-substituted ethyl 2-cyano-1-oxo-3-phenyl-2-propenylcarbamates, RC6H4CHC(CN)CONHCO2C2H5 (where R is 4-CH3CH2, 4-(CH3)2CH, 4-CH3(CH2)3, 2,4-(CH3)2, 2,5-(CH3)2, 2-C2H5O, 3-C2H5O, 4-CH3(CH2)2O, 4-CH3(CH2)3O, 4-CH3(CH2)5O), were prepared and copolymerized with styrene. The monomers were synthesized by the piperidine catalyzed Knoevenagel condensation of ring-substituted benzaldehydes and N-cyanoacetylurethane, and characterized by CHN analysis, IR, 1H- and 13C-NMR. All the ethylenes were copolymerized with styrene (M1) in solution with radical initiation (ABCN) at 70C. The compositions of the copolymers were calculated from nitrogen analysis and the structures were analyzed by IR, 1H- and 13C-NMR. The order of relative reactivity (1/r1) for the monomers is 3-C2H5O (2.1) 4-CH3(CH2)3 (1.7) 2-C2H5O (1.5) 4-CH3CH2 (1.5) 4-CH3(CH2)2O (0.9) 2,5-(CH3)2 (0.5) 4-CH3(CH2)3O (0.5) 2,4-(CH3)2 (0.4) 4-CH3(CH2)4O (0.3) 4-(CH3)2CH (0.3). High Tg of the copolymers, in comparison with that of polystyrene, indicates decrease in chain mobility of the copolymer due to the high dipolar character of the trisubstituted ethylene structural unit. Decomposition of the copolymers in nitrogen occurred in two steps, first in 270-420C with a residue (3-10% wt), which then decomposed in the 550-700C range.
机译：亲电子三取代的乙烯，烷基和烷氧基环取代的2-氰基-1-氧-3--3-苯基-2-丙烯基氨基甲酸酯，RC6H4CHC（CN）CONHCO2C2H5（其中R为4-CH3CH2、4-（CH3）2CH，4-CH3 （CH2）3、2,4-（CH3）2、2,5-（CH3）2、2-C2H5O，3-C2H5O，4-CH3（CH2）2O，4-CH3（CH2）3O，4-CH3制备（CH 2）5 O）并与苯乙烯共聚。通过哌啶催化环取代的苯甲醛和N-氰基乙酰基氨基甲酸酯的Knoevenagel缩合反应合成单体，并通过CHN分析，IR，1H-和13C-NMR进行表征。将所有乙烯与苯乙烯（M1）在溶液中于70℃自由基引发（ABCN）共聚。由氮分析计算共聚物的组成，并通过IR，1 H-和13 C-NMR分析结构。单体的相对反应性（1 / r1）的顺序为3-C2H5O（2.1）4-CH3（CH2）3（1.7）2-C2H5O（1.5）4-CH3CH2（1.5）4-CH3（CH2）2O（ 0.9）2,5-（CH3）2（0.5）4-CH3（CH2）3O（0.5）2,4-（CH3）2（0.4）4-CH3（CH2）4O（0.3）4-（CH3）2CH （0.3）。与聚苯乙烯相比，共聚物的高Tg表明由于三取代的乙烯结构单元的高偶极特性，共聚物的链迁移率降低。共聚物在氮气中的分解分两个步骤进行，首先是在270-420℃下有残留物（3-10％wt），然后在550-700℃范围内分解。

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