10.1021/ma9003715.s001
David Lanson
David
Lanson
Fumi Ariura
Fumi
Ariura
Michel Schappacher
Michel
Schappacher
Redouane Borsali
Redouane
Borsali
Alain Deffieux
Alain
Deffieux
Comb Copolymers with Polystyrene and Polyisoprene Branches: Effect of Block Topology on Film Morphology
American Chemical Society
2009
lamellar biphasic morphologies
comblike copolymers exhibit
results show
PS
PI comb copolymers
weight compositions
force microscopy
Film MorphologyComblike copolymers
uniform molecules
DLS data
AFM experiments show
polyisoprene branches
SAXS
Comb Copolymers
polystyrene
Polyisoprene Branches
Block Topology
molar masses
2009-06-23 00:00:00
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Comb_Copolymers_with_Polystyrene_and_Polyisoprene_Branches_Effect_of_Block_Topology_on_Film_Morphology/2848312
Comblike copolymers with randomly distributed polystyrene (PS) and polyisoprene (PI) branches, i.e., PCEVE-<i>g</i>-(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 ovoïdal 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-<i>g<b>-</b></i>(PS,PI) combs yield lamellar biphasic morphologies that were compared to those observed for PCEVE-<i>g</i>-(PS-<i>b</i>-PI) combs with PS-<i>b</i>-PI diblock branches and those known for linear PS-<i>b</i>-PI of similar weight compositions.