几种热致液晶性纤维素衍生物的制备及性能的研究  

A STUDY ON PREPARATION AND PROPERTIES OF SEVERAL THERMOTROPIC LIQUID CRYSTAL CELLULOSE DERIVATIVES

作　　者：李白千[1] 沈经炜[1] 

机构地区：[1]四川联合大学材料学院

出　　处：《高分子材料科学与工程》1998年第1期104-106,共3页Polymer Materials Science & Engineering

基　　金：国家自然科学基金

摘　　要：以纤维素或羟乙基纤维素为原料，通过酯化反应制备了乙酰氧乙基纤维素（ＡＥＣ）、苯甲酰氧乙基纤维素（Ｂ２ＥＣ）和苯甲酰氧纤维素（Ｂ２Ｃ）。采用ＦＴ－ＩＲ和元素分析表征了产物结构，通过用ＤＳＣ、ＨＳＰＬＭ和ＷＡＸＤ研究了产物的热致液晶织构和性能。Ｂ２Ｃ的热致液晶性最强，其各向同性液态转变温度（ＴＬＩ＝２８２℃）和转变热焓（ΔＨＬＩ＝１４．８８Ｊ／ｇ）是迄今报导的热致液晶纤维素衍生物中最高的。Acetoxy ethyl cellulose(AEC), benzoxy ethyl cellulose(B2EC) and benzoxy cellulose(B2C) were prepared by ester reaction with cellulose or hydroxyethyl cellulose as raw material. The chemical structure of the products were characterized by FTIR and elementary analysis. The thermotropic liquid crystalline texture and properties of the products were studied by DSC, HSPLM and WAXD. The liquid crystalisotropic transition temperature(TLI) and the enthalpy(ΔHLI) of B2C was the highest in all TLCCD reported till now.

关 键 词：纤维素衍生物 热致液晶 制备 性能 液晶 

分 类 号：O636.11[理学—高分子化学] O8631.22[理学—化学]