期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 39, 期 19, 页码 3227-3238出版社
JOHN WILEY & SONS INC
DOI: 10.1002/pola.1305
关键词
free-radical polymerization; functionalized dienes; copolymerization; microstructure; polybutadiene derivative
2-[(N-Benzyl-N-methylamino)methyl]-1,3-butadiene (BMAMBD), the first asymmetric tertiary amino-containing diene-based monomer, was synthesized by sulfone chemistry and a nickel-catalyzed Grignard coupling reaction in high purity and good yield. The bulk and solution free-radical polymerizations of this monomer were studied. Traditional bulk free-radical polymerization kinetics were observed, giving polymers with values of 21 x 10(3) to 48 x 10(3) g/mol (where M-n is the number average molecular weight) and polydispersity indices near 1.5. In solution polymerization, polymers with higher molecular weights were obtained in cyclohexane than in tetrahydrofuran (THF) because of the higher chain transfer to the solvent. The chain transfer constants calculated for cyclohexane and THF were 1.97 X 10(-3) and 5.77 X 10(-3), respectively. To further tailor polymer properties, we also completed copolymerization studies with styrene. Kinetic studies showed that BMAMBD incorporated into the polymer chain at a faster rate than styrene. With the Mayo-Lewis equation, the monomer reactivity ratios of BMAMBD and styrene at 75 degreesC were determined to be 2.6 +/- 0.3 and 0.28 +/- 0.02, respectively. Altering the composition of BMAMBD in the copolymer from 17 to 93% caused the glass-transition temperature of the resulting copolymer to decrease from 64 to -7 degreesC. (C) 2001 John Wiley & Sons, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据