南京林业大学学报（自然科学版）Issue(3)：113-118,6.DOI:10.3969/j.issn.1000-2006.2015.03.021
钛酸正丁酯催化纤维素纤维接枝聚己内酯
Catalytic grafting of cellulose fibers with polycaprolactone by tetrabutyl titanate
摘要
Abstract
Cellulose polycaprolactone was prepared by grafting of cotton linter pulp with caprolactone ( CL) catalyzed by Ti( O-n-Bu) 4 via ring⁃opening polymerization. Effects of reaction temperature, reaction time, Ti( O-n-Bu) 4 amount, and caprolactone ( CL) on monomer conversion and graft rate were investigated through single factor experiments and or⁃thogonal test. The results showed that the significance sequence of the factors affecting the grafting rate was reaction tem⁃perature, mass ratio of CL to cellulose, and reaction time. The optimal reaction conditions were as follows:the amount of catalyst was 2% ( PCL theory degree of polymerization was 37) , the mass ratio of CL to cellulose was 30, and the graft polymerization was carried out at 130 ℃for 25 h. At aforesaid conditions, conversion of CL reached 97. 46% and graft rate of cellulose was 70.44%. Structure and properties were characterized by FTIR, 1 H-NMR, XRD. The FTIR result confirmed cellulose has been grafted with PCL. The 1 H-NMR analysis showed that most of the CL had transformed into PCL, and the calculated CL conversion according to 1 H-NMR was consistent with the result of weight measurement method. The XRD results showed that cellulose crystalline structure in cellulose⁃PCL has decreased, instead crystalline characteristic peaks of PCL was appeared.关键词
纤维素/己内酯/开环聚合/接枝/钛酸正丁酯Key words
cellulose/caprolactone ( CL)/ring-opening polymerization/graft/Ti( O-n-Bu) 4分类
化学化工引用本文复制引用
李韵卒,杨益琴,杨勤武,顾俐慧,王志国..钛酸正丁酯催化纤维素纤维接枝聚己内酯[J].南京林业大学学报（自然科学版）,2015,(3):113-118,6.基金项目
国家林业公益性行业科研专项项目（201404510）；国家自然科学基金青年科学基金项目 （）
