<b>Polycarbonate Bearing Five-Membered Cyclic Carbonate Structurein the Side Chain: Reaction with Monoamines, Crosslinking by </b><b>Diamine and Decrosslinking of the Networked Polymer </b>

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  • <b>5 員環カーボナート構造を側鎖に有するポリカーボナートとモノアミン類の反応およびジアミンによる </b><b>架橋－解重合挙動 </b>
  • 5員環カーボナート構造を側鎖に有するポリカーボナートとモノアミン類の反応およびジアミンによる架橋 : 解重合挙動
  • 5インカン カーボナート コウゾウ オ ソクサ ニ ユウスル ポリカーボナート ト モノアミンルイ ノ ハンノウ オヨビ ジアミン ニ ヨル カケハシ : カイジュウゴウ キョドウ

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Abstract

Selective anionic ring-opening of carbonate monomer (65CC) containing five- and six-membered cyclic carbonate moieties was carried out to obtain a polycarbonate carrying five-membered carbonate structure in the side chain (poly65CC). The reaction of the obtained polymer with monoamines was examined to give predominantly polycarbonate bearing hydroxyurethane moiety in the side chain through the addition of five-membered carbonate with amines. Based on these model reactions, selective reaction of five-membered carbonate in the side chain of poly65CC and hexamethylenediamine was carried out to form a network polymer through hydroxyurethane linkages. In the presence of 1,8-diazabicyclo[5.4.0]-7- undecene (DBU), under a dilute condition, depolymerization of the main chain of the networked polycarbonate proceeded to regenerate the original monomer 65CC with five- and six-membered carbonate structures.

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