Polymerization of Tetrahydrofuran with New Transition Metal Catalyst and Its Mechanism: (p- Methylbenzyl)- o -cyanopyridinium Hexafluoroantimonate
Polymerization of Tetrahydrofuran with New Transition Metal Catalyst and Its Mechanism: (p- Methylbenzyl)- o -cyanopyridinium Hexafluoroantimonate
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发表时间：
1997
影响因子：
1.7
通讯作者：
Jun Kang;Yang-Kyoo Han
中科院分区：
文献类型：
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作者：
Jun Kang;Yang-Kyoo Han
θ。考察了催化剂对四氢呋喃本体聚合的影响。当助催化剂环氧氯丙烷与催化剂浓度比为1：1时，催化活性最好。所得聚合物具有1.0- 40%的相对低的转化率。它们的数均分子量在800至5300范围内。增长率随着温度的升高而增加，根据Arrhenius表达式给出的活化能为62 KJ/mol。我们还发现催化剂通过阳离子机理进行。THF与新的
θ. We examined the effect of the catalyst on the bulk polymerization of tetrahydrofuran under various conditions. The catalytic activity was best in the presence of 1 : 1 of epichlorohydrin used as cocatalyst versus catalyst concentration. The resulting polymers had relatively low conversions in 1.0-40%. Their number average molecular weights were in the range of 800 to 5300. Propagation rate increased with increase in temperature according to an Arrhenius expression giving an activation energy of 62 KJ/mol. We also found catalyst proceeds via a cationic mechanism. that the polymerization of THF with new