Authors Pionteck, J. ; Pötschke, P. ; Proske, N. ; Zhao, H. ; Malz, H. ; Beyerlein, D. ; Schulze, U. ; Voit, B.
Title Morphology of Reactive PP/PS Blends with Hyperbranched Polymers
Date 09.09.2003
Number 10784
Abstract To study the efficiency of different mechanism for reactive compatibilization of polypropylene/polystyrene (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 endgroups 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 like the unimodal distributed particles in the non-reactive PP-Ox/PS-Ox blends. Factors influencing the morphology are discussed.
Publisher Macromolecular Symposia
Citation Macromolecular Symposia 198 (2003) 209-220
Tags blends hyperbranched polymers morphology reactive compatibilization

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