Molecular design and synthesis of crosslinked polyimides using radical isomerization of vinylcyclopropane with thiols
Molecular design and synthesis of crosslinked polyimides using radical isomerization of vinylcyclopropane with thiols
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乙烯基环丙烷与硫醇自由基异构化交联聚酰亚胺的分子设计与合成
DOI:
10.1002/app.50529
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发表时间:
2021
影响因子:
3
通讯作者:
Endo Takeshi
中科院分区:
文献类型:
--
作者:
Okamoto Shusuke;Sudo Atsushi;Endo Takeshi
Reactive polyimides bearing a vinylcyclopropane (VCP) moiety in the main chain were successfully synthesized from the corresponding diamine with the VCP moiety. Their radical crosslinking using a dithiol proceeded with the radical ring‐opening reaction (RROR) of the VCP moiety to afford the corresponding crosslinked polyimides with the CC bonds in crosslinking moieties. Thermal properties of those crosslinked polyimides were evaluated by thermal gravimetry and differential scanning calorimetry. As a result, the increase of the crosslinking degree in the crosslinked polymer exhibited great residual weight at 600°C. In contrast, the tendency of the glass transition temperature was inverse because the increase in the amount of dithiol unit as a crosslinker would enhance the mitigation of the polymer packing structure and activates the mobility of polymer chains.
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Endo Takeshi