Comb copolymers with polystyrene and polyisoprene branches: Effect of block topology on film morphology
BORSALI, Redouane
Centre de Recherches sur les Macromolécules Végétales [CERMAV]
Laboratoire de Chimie des Polymères Organiques [LCPO]
Centre de Recherches sur les Macromolécules Végétales [CERMAV]
Laboratoire de Chimie des Polymères Organiques [LCPO]
DEFFIEUX, Alain
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
< Reduce
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering
Language
en
Article de revue
This item was published in
International Journal of Biological Macromolecules. 2009, vol. 42, n° 12, p. 3942-3950
Elsevier
English Abstract
Comblike copolymers with randomly distributed polystyrene (PS) and polyisoprene (PI) branches, i.e., PCEVE-g-(PS, PI), were synthesized by the "grafting onto" technique. The comblike copolymers exhibit a low dispersity, ...Read more >
Comblike copolymers with randomly distributed polystyrene (PS) and polyisoprene (PI) branches, i.e., PCEVE-g-(PS, PI), were synthesized by the "grafting onto" technique. The comblike copolymers exhibit a low dispersity, high molar masses, and controlled number of branches. Their characteristics and behavior as isolated objects were investigated as solid molecular deposits, using atomic force microscopy (AFM), and in solution, in a good solvent of the polystyrene and polyisoprene branches, using dynamic light scattering (DLS). AFM experiments show isolated uniform molecules that adopt an ovo'idal conformation whose dimensions are found in good agreement with DLS data. The self-organization of the PS, PI comb copolymers was further studied in the solid state as thin films, using SAXS. The results show that PCEVE- g-(PS, PI) combs yield lamellar biphasic morphologies that were compared to those observed for PCEVE-g-(PS-b-PI) combs with PS-b-PI diblock branches and those known for linear PS-b-PI of similar weight compositions.Read less <
English Keywords
Biphasic
AFM
Comblike copolymers
Comb copolymers
Block topology
Grafting onto
Film morphology
Dispersity
Diblock
Randomly distributed
Self-organization
Origin
Hal imported