Synthesis and Characterization of Thermally Stable Polymers through Anionic Polymerization of tert-Alkyl Crotonates
Synthesis and Characterization of Thermally Stable Polymers through Anionic Polymerization of tert-Alkyl Crotonates
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巴豆酸叔烷基酯阴离子聚合热稳定聚合物的合成与表征
DOI：
10.1295/polymj.23.211
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发表时间：
1991
期刊：
影响因子：
2.8
通讯作者：
T. Otsu
中科院分区：
文献类型：
--
作者：
A. Matsumoto;Atsushi Horie;T. Otsu
以叔丁基锂为阴离子催化剂，在甲苯或四氢呋喃中聚合制备了含有叔烷基的烷基丁基、叔戊基、1-金刚烷基和3,5-二甲基-1-金刚烷基丁烷酸酯。通过红外光谱和核磁共振光谱分析，证实聚合物为聚取代亚甲基结构。含有金刚烷基的聚合物具有更强的抗水解性，而叔丁基和戊酯则容易被水解。金刚烷基的引入也提高了聚合物的玻璃化转变温度和分解温度。结果表明，含叔丁基酯和戊基酯的聚合物通过两步法分解，生成聚丁酸并消除酯基上相应的烯烃，但含adamantyl的聚合物表现出优异的热稳定性。
Some alkyl crotonates bearing tert-alkyl groups, i.e., tert-butyl, tert-amyl, 1-adamantyl and 3,5-dimethyl-1-adamantyl crotonates were prepared and polymerized with sec-butyllithium as an anionic catalyst in toluene or THF. The resulting polymers were confirmed to consist of poly(substituted methylene) structure by IR and NMR spectroscopies. The polymers bearing adamantyl groups had more resistance to hydrolysis, whereas the tert-butyl and amyl esters were readily hydrolyzed. The introduction of the adamantyl groups also increased glass transition temperature and decomposition temperature of the polymer. It was revealed that the polymers bearing the tert-butyl and amyl esters decomposed via a two-step mechanism, resulting in the formation of poly(crotonic acid) accompanied with elimination of corresponding olefins from the ester groups, but the polymers containing adamantyl groups showed excellent thermal stability.
聚富马酸二异丙酯的稀溶液性质
DOI：
--
发表时间：
2005
期刊：
影响因子：
--
作者：
M.;Nakatsuji;M.;Hyakutake;M.;Sato;T.;Yoshizaki
通讯作者：
Yoshizaki