文献类型：期刊文献

英文题名：Surface-initiated atom transfer radical polymerization of butyl acrylate on cellulose microfibrils

作者：Xiao, Miaomiao[1];Li, Shuzhao[1,2];Chanklin, Wilailak[1];Zheng, Anna[2];Xiao, Huining[1]

机构：[1]Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada;[2]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2011

卷号：83

期号：2

起止页码：512

外文期刊名：CARBOHYDRATE POLYMERS

收录：;EI(收录号：20104713405123);WOS:【SCI-EXPANDED(收录号:WOS:000285437000027)】；

基金：The NSERC Canada Auto 21 NCE and NSERC Green Wood Fibre Network are gratefully acknowledged for financial support

语种：英文

外文关键词：Cellulose microfibril (CMF); SI ATRP; Macroinitiator; Butyl acrylate; Grafting

摘要：Surface-initiated atom transfer radical polymerization (SI-ATRP) of butyl acrylate (BA) on cellulose microfibrils (CMF) was conducted to create controllable hydrophobic chains on CMF The macroiniator CMF-Br was prepared by the esterification of hydroxyl groups on CMF with 2-bromoisobutyrylbromide (BIBB) followed by the ATRP of BA using two catalyst systems Cu(I)Br/2 2 -bipyridine (BPY) and Cu(I)Br/pentamethyl-diethylenetriamine (PMDETA) The molecular weight (MW) and polydispersity of the grafted PBA cleaved from CMF via hydrolysis was determined using GPC The results indicated that the PMDETA system exhibited relatively poor control over the ATRP whereas the BPY system produced the PBA with tailored chain lengths and relatively narrow polydispersities but experienced a rather slow polymerization process To optimize the polymerization with the CuBr/PMDETA system several influencing factors were investigated including the type of solvents reaction temperature and the use of co-catalyst Cu(II)Br2 The hydrophobic-modified CMF is of great potential as reinforcements biocomposites (C) 2010 Elsevier Ltd All rights reserved