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Influence of Reactive Compatibilization on the Morphology of Polypropylene/Polystyrene Blends
Author(s) -
Pionteck J.,
Pötschke P.,
Schulze U.,
Proske N.,
Kaya A.,
Zhao H.,
Malz H.
Publication year - 2004
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.200451020
Subject(s) - compatibilization , polypropylene , materials science , polymer blend , polystyrene , oxazoline , copolymer , morphology (biology) , polymer chemistry , phase (matter) , chemical engineering , polymer , miscibility , ternary operation , composite material , chemistry , organic chemistry , catalysis , biology , computer science , engineering , genetics , programming language
To study the efficiency of different mechanisms for reactive compatibilization of polypropylene/polystyrene blends (PP/PS blends), main chain or terminal‐functionalized PP and terminal‐functionalized PS have been synthesized by different methods. While the in‐situ block and graft copolymer formation results in finer phase morphologies compared to the corresponding non‐reactive blends, the morphology development in the ternary blend system PP/PS + HBP (hyperbranched polymer) is a very complex process. HBP with carboxylic acid end groups reacts preferably with the reactive sites of the oxazoline functionalized PS (PS‐Ox) and locates mainly within the dispersed PS‐Ox phase. A bimodal size distribution of the PS‐Ox particles within the oxazoline modified PP (PP‐Ox) matrix phase is observed with big PS‐Ox particles (containing the HBP as dispersed phase) and small PS‐Ox particles similar in size to the unimodal distributed particles in the non‐reactive PP‐Ox/PS‐Ox blends. Factors influencing the morphology are discussed.