Cellulose-g-PDMAam copolymers by controlled radical polymerization in homogeneous medium and their aqueous solution properties

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• 作者：Miia Hiltunen ; ^{miia.hiltunen@helsinki.fi} ; Joonas Siiril&#228 ; Vladimir Aseyev ; Sirkka Liisa Maunu
• 关键词：Cellulose-graft-copolymer ; Water-soluble ; SET-LRP ; Solution properties
• 刊名：European Polymer Journal
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：48
• 期：1
• 页码：136-145
• 全文大小：742 K

文摘

Water-soluble cellulose-graft-PDMAam copolymers were prepared by single-electron-transfer living radical polymerization (SET-LRP). Cellulose based macroinitiator for SET-LRP with a degree of substitution DS ?#xA0;2 was synthesized from softwood dissolving pulp in a homogeneous LiCl/DMAc solution. The macroinitiator was then grafted using N,N-dimethyl acrylamide (DMAam) in DMSO. Formation of cellulose-g-DMAam copolymers were confirmed by ATR-FTIR, ¹H and ¹³C NMR spectroscopy and SEC analyses. Light scattering and steady-shear viscosity measurements revealed that the studied chain length of grafts (DP_graft) had only minor effects on the solution properties of cellulose-g-PDMAam copolymers. SLS studies suggested a loose, solvent-draining architecture of the cellulose-g-PDMAam copolymer particles in H₂O.