纤维素高级脂肪酸酯梳状聚合物的制备与微观结构  

Preparation and Microstructure of Cellulose Fatty Acid Ester Comblike Polymers

作　　者：陈曦 孔祥云 张严双 刘凌志[2] 刘永鑫 Xi Chen;Xiangyun Kong;Yanshuang Zhang;Lingzhi Liu;Yongxin Liu(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China;State Key Laboratory of Polymrr Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]华东交通大学材料科学与工程学院,江西南昌330013 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,吉林长春130022

出　　处：《高分子材料科学与工程》2021年第3期32-39,共8页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21865010);江西省教育厅青年基金(GJJ180346);江西省科技厅青年基金(20192BAB216014)。

摘　　要：设计合成了一系列不同侧链长度及不同取代度的纤维素高级脂肪酸酯,并对其微观结构进行了系统的研究。结果表明,当纤维素酯梳状聚合物侧链的碳原子个数超过11的时候,可以表现出较明显的熔融/结晶转变,其熔融/结晶温度、热焓值以及分子间距随着侧链长度的变化而变化。取代度的变化对纤维素酯的熔融/结晶温度、热焓值也有一定影响,但却不会改变侧链分子间距离。纤维素酯梳状聚合物始终以层状结构排列,侧链完全伸展开并与主链相互垂直,且在温度改变时侧链会由规整的六方相排列向无定形排列转化。A series of cellulose fatty acid esters with different side chain lengths and different degrees of substitution were designed and synthesized.The results show that when the carbon number of side chain of cellulose ester comb polymers is more than 11,the melt/crystallization transition is obvious,and the melting/crystallization temperature,enthalpy and molecular spacing vary with the change of side chain length.The change of substitution degree also has some influence on the melting/crystallization temperature and enthalpy of cellulose esters,but it could not change the intermolecular distance of side chains.Cellulose ester comb polymer is always arranged in a layered structure,the side chains are completely extended and perpendicular to the main chains,and under the change of temperature,the side chains will be transformed from a regular hexagonal phase to an amorphous arrangement.

关 键 词：梳状聚合物 纤维素酯 侧链 

分 类 号：TQ352.71[化学工程]