| 纤维素混合醚的合成及液晶性质研究 |
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| 引用本文： | 董炎明,成志锋.纤维素混合醚的合成及液晶性质研究[J].湘潭大学自然科学学报,1994,16(3):40-44. |
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| 作者姓名： | 董炎明 成志锋 |
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| 作者单位： | 湘潭大学化学系 |
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| 基金项目： | 国家教育委员会留学回国人员资助 |
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| 摘 要： | 本文用一种经济简便的均相反应制备纤维素混合醚．乙基纤维素（ＥＣ）在乙醇溶液中和醚化剂反应制取乙基丁基纤维素（ＢＥＣ）、乙基庚基纤维素（ＨＥＣ）、乙基苄基纤维素（ＢＺＥＣ）ＥＣ和这三种混合醚均具有溶致和热致液晶性．ＨＥＣ和ＢＺＥＣ的临界浓度比ＥＣ高，三种混合醚的熔点均比ＥＣ低，而热致液晶形成温区均比ＥＣ宽．
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| 关 键 词： | 纤维素醚 液晶 条带织构 指纹状织构 |
SYNTHESIS AND LIQUID CRYSTALLINE CHARACTERISTICS STUDIES OF CELLULOSE MIXED ETHERS DEEIVED FROM EC |
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| Dong Yanming, Cheng Zhifeng.SYNTHESIS AND LIQUID CRYSTALLINE CHARACTERISTICS STUDIES OF CELLULOSE MIXED ETHERS DEEIVED FROM EC[J].Natural Science Journal of Xiangtan University,1994,16(3):40-44. |
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| Authors: | Dong Yanming Cheng Zhifeng |
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| Abstract: | Cellulose mixed ethers have been prepared using one kind of homogeneous reaction which is economical,simple and convenient. Commercial etheyl cellulose (EC) reacted with etherfication reagents in ethanol solution, so that butyl etheyl cellulose (BEC),ethyl heptyl cellulose (HEC),and benzel ethyl cellulose (BZEC)were prepared.Ethyl cellulose and all three cellulose mixed ethers exhibited both lytropic and thermotropic liquid crystal behaviours. The critical concertrations of HEC and BZEC were determined to be higher than that of EC. The melting points of these there cellulose mixed ethers became lower than that of EC,at the same time,their temprature ranges in which the thermotropic liquid crystal exists were much wider. |
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| Keywords: | cellulose ether liquid crystal banded texture finger-print texture |
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