Cellulose-based graft copolymers with controlled architecture prepared in a homogeneous phase

0364282 - ÚMCH 2012 RIV US eng J - Journal Article
Raus, Vladimír - Štěpánek, M. - Uchman, M. - Šlouf, Miroslav - Látalová, Petra - Čadová, Eva - Netopilík, Miloš - Kříž, Jaroslav - Dybal, Jiří - Vlček, Petr
Cellulose-based graft copolymers with controlled architecture prepared in a homogeneous phase.
Journal of Polymer Science. Part A - Polymer Chemistry. Roč. 49, č. 20 (2011), s. 4353-4367. ISSN 0887-624X. E-ISSN 1099-0518
R&D Projects: GA ČR GA106/09/1348; GA ČR GAP208/10/0353
Institutional research plan: CEZ:AV0Z40500505
Keywords : atom transfer radical polymerization (ATRP) * cellulose * graft copolymers
Subject RIV: JI - Composite Materials
Impact factor: 3.919, year: 2011

Cellulose-based macroinitiators with predetermined number of initiation sites were synthesized by acylation of microcrystalline cellulose AVICEL PH-101 with 2-bromoisobutyryl bromide under homogeneous reaction conditions in the DMAc/LiCl solvent system. The influence of different methods of cellulose activation on the acylation efficiency and reproducibility was investigated. A new activation protocol, based on solvent exchange to 1,4-dioxane, was introduced. Prepared macroinitiators were used for grafting with styrene and MMA using optimized ATRP reaction conditions to achieve well-controlled polymerizations with high initiation efficiency. In addition, SET LRP technique employing Cu(0) as the catalyst was used for the first time to prepare cellulose-graft-polystyrene and cellulose-graft-poly(MMA) copolymers in a homogeneous phase. Moreover, some of the prepared copolymers were characterized by static and dynamic light scattering, and microscopic techniques.
Permanent Link: http://hdl.handle.net/11104/0006546