Polymers with rigid molecular chains tend to form liquid crystals. This refers to the method of producing fibers from this liquid crystal state. When a solution or melt of a polymer in a liquid crystal state is made to flow, the molecular chains easily orient in the direction of flow, resulting in high-strength fibers. For example, when poly( p -phenylene terephthalamide) is dissolved in concentrated sulfuric acid, liquid crystals form at a certain solution concentration, and fibers (Kevlar) can be obtained by spinning this solution using a dry-wet method. [See alternative terms] Dry spinning, wet spinning Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition |
分子鎖が剛直な高分子は,液晶を形成しやすくなる.このような液晶状態から繊維を製造する方法をいう.液晶状態にある高分子の溶液または融体を流動させると,流動方向に分子鎖は容易に配向するため,高強度繊維が得られる.たとえば,ポリ(p-フェニレンテレフタルアミド)を濃硫酸に溶かすと,ある溶液濃度で液晶が形成され,この溶液を乾湿式法で紡糸することにより繊維(ケブラー)が得られる.[別用語参照]乾式紡糸,湿式紡糸 出典 森北出版「化学辞典(第2版)」化学辞典 第2版について 情報 |
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