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Ring‐opening metathesis polymerization of ω‐norbornenyl polystyrene macromonomers and characterization of the corresponding structures
Author(s) -
Breunig S.,
Héroguez V.,
Gnanou Y.,
Fontanille M.
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950950114
Subject(s) - macromonomer , molar mass , radius of gyration , polystyrene , polymerization , degree of polymerization , polymer chemistry , multiangle light scattering , ring opening metathesis polymerisation , anionic addition polymerization , molar mass distribution , metathesis , size exclusion chromatography , chemistry , materials science , light scattering , scattering , polymer , organic chemistry , physics , optics , enzyme
Abstract ω‐Norbornenyl polystyrene (PS) macromonomers whose molar masses range from 2700 to 11000 g/mole have been polymerized under living conditions by ring‐opening metathesis, with a Schrock complex as initiator. The samples obtained have been characterized by a multiangle laser light scattering (MLLS) detector connected to the outlet of a size exclusion chromatography (SEC) instrument. The experimental values of the degree of polymerization (D̄P n ) lie in close agreement with the expected ones. The compactness of the various branched species formed, which covers a wide range of segment densities (ρ S ), is found to depend on two factors that are their degree of polymerization and the size of the initial macromonomer. The ratio (g) of the mean‐square radii gyration (