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.