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Phase separation during the chemical blending of polybutadiene/polystyrene blend
Author(s) -
Nam Dong Ki,
Kim Sung Chul
Publication year - 1990
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1990.220010305
Subject(s) - polybutadiene , materials science , polystyrene , upper critical solution temperature , nucleation , polymerization , coalescence (physics) , monomer , styrene , polymer chemistry , phase (matter) , chemical engineering , lower critical solution temperature , copolymer , composite material , organic chemistry , polymer , chemistry , physics , astrobiology , engineering
Phase separation behavior of the chemical blending of the polybutadiene (PBD)/polystyrene (PS) was investigated by the light scattering technique. Polybutadiene was dissolved in the styrene monomer and the polymerization of the styrene monomer was carried out thermally in the presence of the dissolved polybutadiene. The effect of the PBD composition, synthesis temperature and the PS crosslink density on the phase separtion behavior were analyzed. The mixture of PBD/PS/styrene monomer showed UCST (upper critical solution temperature) character. It was found that the phase separation was proceeded by the nucleation and growth mechanism in the early stage of polymerization. The time (t) dependence of the domain correlation length (d m ) could be represented by a power law in the late stage of the phase separation. The crosslinking of PS hindered phase separation in the coalescence process.