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Evaluation of the Final Morphology of HIPS Based on the Architecture of the Compatibilizer Graft Copolymer PBd‐ g ‐PS
Author(s) -
de Anda Carlos,
Morales Graciela,
Acuña Pablo,
Sosa José,
Knoeppel Dave,
Mays Jimmy W.
Publication year - 2009
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.200950905
Subject(s) - copolymer , azobisisobutyronitrile , polybutadiene , materials science , polymer chemistry , polymerization , natural rubber , morphology (biology) , radical polymerization , transmission electron microscopy , polystyrene , chemical engineering , composite material , polymer , nanotechnology , biology , engineering , genetics
High Impact Polystyrene (HIPS) was synthesized by radical bulk polymerization at 70 °C using 6% w/w of total rubber and 0.01% w/w of azobisisobutyronitrile (AIBN) as radical initiator, where the total rubber was composed by polybutadiene (PBd) and model graft copolymers PBd‐ g ‐PS. Different ratios in weight percent of PBd to PBd‐ g ‐PS were used in order to evaluate the effect of the graft copolymers on the morphology development of the rubber particles during the HIPS synthesis reaction. The morphology of the final material was evaluated by Transmission Electron Microscopy (TEM). The model graft copolymers used with controlled architecture and molecular weight were synthesized previously by high vacuum anionic polymerization. Results show that increasing the content and changing the architecture of the graft copolymer significantly affects the phase inversion point.