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Synthesis and bulk characterization of new P(CB-b-S) diblock copolymers
Stone, V. W.; Jonas, Alain M; Legras, Roger et al.
1999In Journal of Polymer Science. Part A, Polymer Chemistry, 37 (2), p. 233-244
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Keywords :
diblock copolymer
Abstract :
[en] Strongly asymmetric chlorinated polybutadiene-b-polystyrene, [P((CB)x-b-(PS)y)] diblock copolymers with increasing x/(x + y) ratios (up to 5.2 mol %) have been synthesized by the selective chlorination of the polybutadiene (PB) block in solution. Chlorination has been performed in anhydrous dichloromethane added with an antioxidant [2,2-methylenebis-(6-tert-butyl-4-methyl-phenol)], at -50°C, under a continuous Ar flow and in the dark. Under the optimized experimental conditions, the PB chlorination is not complete, but the PS block is left unmodified. Even in the presence of a large chlorine excess (Cl2/butene unit molar ratio of 2.5), the experimental degree of chlorination of homo PB does not exceed 85%. The chlorinated copolymers have been characterized by 1H-NMR, IR spectroscopy, size-exclusion chromatography, and elemental analysis. The chlorinated copolymers have also been studied by DSC and SAXS after annealing at 150°C. Although at this temperature the parent homopolymers are immiscible, no microphase separation has been observed for the block copolymers.
Research center :
Center for Education and Research on Macromolecules (CERM)
Disciplines :
Materials science & engineering
Chemistry
Author, co-author :
Stone, V. W.;  Université catholique de Louvain (UCL) > Unité de Physique et de Chimie des Hauts Polymères
Jonas, Alain M;  Université catholilque de Louvain (UCL) > Unité de Physique et de Chimie des Hauts Polymères
Legras, Roger;  Université catholique de Louvain (UCL) > Unité de Physique et de Chimie des Hauts Polymères
Dubois, Philippe ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Jérôme, Robert ;  Université de Liège - ULiège > Department of Chemistry > Center for Education and Research on Macromolecules (CERM)
Language :
English
Title :
Synthesis and bulk characterization of new P(CB-b-S) diblock copolymers
Publication date :
15 January 1999
Journal title :
Journal of Polymer Science. Part A, Polymer Chemistry
ISSN :
0887-624X
eISSN :
1099-0518
Publisher :
John Wiley & Sons, Hoboken, United States - New Jersey
Volume :
37
Issue :
2
Pages :
233-244
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - SPP Politique scientifique - Service Public Fédéral de Programmation Politique scientifique
Available on ORBi :
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