含奈聚酯液晶彈性體之合成與研究

• Main Author: 陳慧玲
• Other Authors: 蔡三元
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/94811897964550563509

碩士 === 國立成功大學 === 化學工程學系 === 89 === After the discovery of Kevlar by Du Pont Co., let the great progress of liquid crystalline polymer. The successful example is Vectra that exhibits chemical resistance, high heat resistance, etc. So we added the soft segment into the main chain of Vectra to form the liquid crystalline elastomers (LCE) by the melt polycondensation reactions. According to the technology of Vectra’s polymerization and the industrial processes of PET, the LCEs that based on 6-hydroxy- 2-naphthoic acid (HNA), 4-hydroxybenzoic acid (HBA), terephthalic acid (TPA) and polytetramethylene ether glycol (PTMEG) have been synthesized by two stages. The initial stage inclued that ANA and ABA were prepared differently by the esterification of HNA and HBA and the soft segments were prepared from TPA and PTMEG. The second stage, the LCEs with ABA, ANA and different amount or molecule weights of the soft segments were prepared by melt polycondensation reactions. The LCEs were characterized by IR, NMR, EA, TGA, DSC, XRD, DMA and POM. The results of the research demonstrate that the characteristics of the products include good anti-solvent and over 400℃ of the decomposition temperature. Increasing the amount and the molecule weights of the soft segment PTMET reduce the melting point, the glass transition point, the crystalline. And the mesophase can be observed by POM. 英文摘要……………………………………………………………………Ⅱ 誌謝…………………………………………………………………………Ⅲ 總目錄………………………………………………………………………Ⅳ 表目錄………………………………………………………………………Ⅴ 圖目錄………………………………………………………………………Ⅶ 主文 第一章 前言…………………………………………………………….1 第二章 文獻回顧與原理……………………………………………….3 2.1 液晶概要…………………………………………………..........3 2.2 液晶高分子………………………………………………..........5 2.3 熱塑性彈性體……………………………………………..........11 2.4 彈性體所使用之硬鏈段與軟鏈段………………………..........16 2.5 聚酯液晶之合成方法……………………………………..........18 2.6 Vectra液晶彈性體的合成方法…………………………..........20 第三章 實驗部分………………………………………………………….23 3.1 藥品……………………………………………………….23 3.2 實驗設備及儀器………………………………………….24 3.3 合成步驟………………………………………………….26 3.4 儀器分析方法…………………………………………….29 第四章 結果與討論……………………………………………………….34 4.1 製程之探討……………………………………………….34 4.2 酯化物之結構分析……………………………………….36 4.3 液晶彈性體之成分分析及性質測試…………………….38 第五章 總結……………………………………………………………….71 第六章 參考文獻………………………………………………………….72 自述………………………………………………………………………..77