Syntheses and crosslinking reactions of self-curable copolymers containing pendant cyclic iminoethers and carboxylic acid groups
Syntheses and crosslinking reactions of self-curable copolymers containing pendant cyclic iminoethers and carboxylic acid groups
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含环状亚氨基醚和羧酸基团的自固化共聚物的合成和交联反应
DOI：
10.1002/pola.1987.080251101
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
Atushi Tōkairin
中科院分区：
文献类型：
--
作者：
T. Nishikubo;T. Iizawa;Makoto Takahashi;Atushi Tōkairin
通过4，4-二甲基-2-乙烯基-2-恶唑啉、4，4-二甲基-2-异丙烯基-2-恶唑啉或4，4，6-三甲基-2-乙烯基-4H-二氢-1，3-恶嗪与甲基丙烯酸和苯乙烯的自由基共聚，成功地合成了含有侧链环亚胺醚如4，4-二甲基-2-恶唑啉或4，4，6-三甲基-4H-二氢-1，3-恶嗪和羧酸的可溶性共聚物，甲基丙烯酸甲酯或丙烯酸乙酯，使用AIBN作为引发剂，在苯或DMF中，在60或80°C下。通过在70°C下加热，所获得的共聚物的交联反应不发生。然而，这些共聚物通过在130°C下加热定量地产生凝胶产物。共聚物的交联反应速率随着侧链环亚氨基醚和羧酸基团的增加而增加。交联速率也受聚合物链的分子运动的影响。
我们的研究结果表明，更多的空间位阻的2-乙烯基-2-恶唑啉的共聚物是更稳定的，所以他们可以在一个可控的方式和在更高的温度下比以前研究的？
Soluble copolymers containing both pendant cyclic iminoethers such as 4,4-dimethyl-2-oxazoline or 4,4,6-trimethyl-4H-dihydro-1,3-oxazine and carboxylic acid were successfully synthesized by radical copolymerizations of 4,4-dimethyl-2-vinyl-2-oxazoline, 4,4-dimethyl-2-isopropenyl-2-oxazoline, or 4,4,6-trimethyl-2-vinyl-4H-dihydro-1,3-oxazine with methacrylic acid and styrene, methyl methacrylate, or ethyl acrylate using AIBN as an initiator in benzene or DMF at 60 or 80°C. The crosslinking reaction of the copolymers obtained did not occur by heating at 70°C. However, these copolymers quantitatively produced gel products by heating at 130°C. The rate of crosslinking reaction of the copolymer increased with increasing pendant cyclic iminoether and carboxylic acid groups. The rate of crosslinking was also affected by the molecular motion of the polymer chain.
Our results show that the copolymers of more sterically hindered 2-vinyl-2-oxazolines are more stable and so they can be crosslinked in a controlled manner and at higher temperatures than the previously studied polyoxaziline system.