醋酸丙酸纤维素的非均相合成及表征  

Heterogeneous Synthesis and Characterization of Cellulose Acetate Propionate

作　　者：冷一欣[1] 李园园[1] 黄春香[1] 

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《化学世界》2012年第5期274-277,共4页Chemical World

摘　　要：采用非均相催化酯化法合成醋酸丙酸纤维素(CAP),在乙酸/乙酸酐/丙酸酐体系中,以浓硫酸为催化剂合成出一系列不同取代度的CAP,并FT IR分析证实了酯化产物的生成。研究酯化剂组成(不同比例的乙酸酐/丙酸酐)、原料聚合度、催化剂用量和反应时间对CAP粘度及热性能的影响以及产品CAP的酰基含量对溶解性的影响。得到较稳定热性能CAP的反应条件为:采用聚合度DP=1926的木纤维素,催化剂用量10%(wt,相当于纤维素),40℃酯化反应3h。Cellulose acetate propionate（CAP） was synthesized through heterogeneous esterification of cellulose.Cellulose acetate propionate with various degree of substitution was synthesized in acetic acid/acetic anhydride/propionic anhydride system with sulfuric acid as catalyst.The product was identified by means of FT IR.The effect of ratio of acetic anhydride/propionic anhydride,molecular weight of cellulose,amount of catalyst and esterification time on viscosity,thermal properties and dissolubility of CAP was studied.The suitable conditions were obtained as follows： molecular weight of wood cellulose was DP=1926,amount of catalyst was 10%（wt） to cellulose,reaction temperature was 40℃,and reaction time was 3 h.

关 键 词：纤维素 醋酸丙酸纤维素 合成 热性能 

分 类 号：TQ352.6[化学工程]