高取代度乙基纤维素的合成研究  

Study on the Preparation of High Substituted Ethyl Cellulose

作　　者：谢传龙[1] 付时雨[1] 邢晓纯[2] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]华南农业大学资源环境学院,广东广州510642

出　　处：《广东化工》2010年第11期3-4,12,共3页Guangdong Chemical Industry

基　　金：国家高技术研究发展计划资助项目(2007AA100704)

摘　　要：采用溴乙烷作醚化剂,四氢呋喃作稀释剂合成乙基纤维素,研究了反应时间和反应温度对产品得率的影响,结果表明反应可从80℃开始,产品得率随反应温度升高而增大,可达89.7%,7～9h反应即可结束。利用红外光谱、核磁共振和凝胶渗透色谱对产品结构进行了表征。计算得出合成的乙基纤维素取代度在2.5左右,分子质量分布窄,在有机溶剂中具有良好的溶解性能。High substituted ethyl cellulose was synthesized by using ethyl bromide as etherification agent and THF as inert solvent in the reaction.The reaction was started from 80 ℃,and the conversion of EC increased with the temperature,as high as 89.7%,even higher.The reaction cost about 7-9 h.The structure of ethyl cellulose was characterized and confirmed by FTIR and 1H-NMR.The molar mass distribution,average molar mass and the polydispersity were measured by GPC.The DS of the EC obtained was around 2.5.And the EC had narrow molecular weight distribution which responses to good solubility.

关 键 词：乙基纤维素 高取代度 合成 溴乙烷 四氢呋喃 

分 类 号：TQ[化学工程]