Anionic Copolymerization of Butadiene and 1,1-Diphenylethylene
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概要
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The anionic copolymerization of butadiene (M<SUB>1</SUB>) and 1,1-diphenylethylene was investigated in tetrahydrofuran (THF) and benzene, using <I>n</I>-butyllithium (<I>n</I>-BuLi), Na-naphthalene, and Na-and K-dispersions as initiators. An alternating copolymer was formed in THF, where the reaction proceeded without termination and chain-transfer reactions. The monomer reactivity ratios, <I>r</I><SUB>1</SUB> were 0.13 (Li<SUP>+</SUP>), 0.09 (Na<SUP>+</SUP>), and 0.09 (K<SUP>+</SUP>) in THF at 0°C. The <I>r</I><SUB>1</SUB> values in benzene at 40°C were 54 (Li<SUP>+</SUP>), 0.71 (Na<SUP>+</SUP>), and 0.10 (K<SUP>+</SUP>). The order of rate constants in THF was <I>k</I><SUB>12</SUB>><I>k</I><SUB>11</SUB>><I>k</I><SUB>21</SUB>; the last of these was 0.27M<SUP>−1</SUP> sec<SUP>−1</SUP>, with <I>n</I>-BuLi at 0°C.
- 公益社団法人 日本化学会の論文
著者
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Okamoto Yoshio
Department Of Applied Chemistry Faculty Of Engineering Nagoya University
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Yuki Heimei
Department of Applied Chemistry, Faculty of Engineering, Osaka University
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