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首页> 外文期刊>繊維学会誌 >Structural Study on Aromatic Poly(amic n-alkyl ester)s and Their Derivatives by Solid-State Imidization Ⅱ. Effect of Unremoved Alkyl Chains Attached by Ether Linkage
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Structural Study on Aromatic Poly(amic n-alkyl ester)s and Their Derivatives by Solid-State Imidization Ⅱ. Effect of Unremoved Alkyl Chains Attached by Ether Linkage

机译：固态亚胺化的芳族聚酰胺（烷基正烷基酯）及其衍生物的结构研究Ⅱ。醚键连接未除去的烷基链的作用

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摘要

Rodlike aromatic copolyamides (CoPA-8), in which some octyloxycarbonyl [H(CH_2)_8OC(=O)-] side chains of poly(amic octyl ester) (PA-8) were substituted by octyloxy [H(CH_2)_8O-] groups, were prepared. In CoPA-8, the octyl side chains were attached to the main chain by ether or ester linkage. Structure of CoPA-8 before and after thermal and chemical imidization was investigated, and the results were compared with PA-8. Before the imidization, CoPA-8 formed a layered structure with alternating main-chain and side-chain segregated layers. Because the ether linkage was stable against the imidization reaction, formation of imide ring occurred only at the monomer unit having octyloxycarbonyl group. After imidization at 300℃, the octyloxy groups were removed by thermal degradation, however, the layered structure was still maintained as suggested by wide-angle X-ray diffraction pattern. Effectiveness of the octyl chains attached by ether linkage in order to maintain the layered structure has been discussed.
机译：棒状芳族共聚酰胺（CoPA-8），其中聚（酰胺基辛酸酯）（PA-8）的一些辛氧基羰基[H（CH_2）_8OC（= O）-]侧链被辛氧基[H（CH_2）_8O- ]组，准备好了。在CoPA-8中，辛基侧链通过醚或酯键连接至主链。研究了热和化学酰亚胺化前后CoPA-8的结构，并将结果与​​PA-8进行了比较。在酰亚胺化之前，CoPA-8形成了具有交替的主链和侧链隔离层的分层结构。因为醚键对于酰亚胺化反应是稳定的，所以仅在具有辛氧基羰基的单体单元上形成酰亚胺环。在300℃下酰亚胺化后，通过热降解除去了辛氧基，但是，如广角X射线衍射图所示，仍保持了层状结构。为了保持层状结构，已经讨论了通过醚键连接的辛基链的有效性。

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