Premium
Morphology of Compatibilized Ternary Blends
Author(s) -
de Freitas Cássia Alves,
Valera Ticiane Sanches,
Catelli de Souza Adriana Martinelli,
Demarquette Nicole Raymonde
Publication year - 2007
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.200750130
Subject(s) - materials science , polypropylene , polystyrene , copolymer , ternary operation , styrene , composite material , polymer blend , morphology (biology) , methyl methacrylate , phase (matter) , polymer chemistry , chemical engineering , polymer , chemistry , organic chemistry , computer science , engineering , programming language , biology , genetics
In this work, the evolution of the morphology of polypropylene/polystyrene/poly(methyl metacrylate) (PP/PS/PMMA) blends to which graft copolymers polypropylene‐ graft ‐polystyrene (PP‐ g ‐PS) of 2 compositions (55/45 and 70/30), polypropylene‐ graft ‐poly(methyl metacrylate) (PP‐ g ‐PMMA), or styrene‐ block ‐(ethylene‐ co ‐butadiene)‐ block ‐styrene (SEBS) was added has been studied. The ternary blends morphologies were predicted using phenomenological models that predict the morphology of ternary blends as a function of the interfacial tension between the blend components (spreading coefficient and free energy minimization). All blends studied presented a core‐shell morphology with PS as shell and PMMA as core. The addition of PP‐ g ‐PS or SEBS resulted in a reduction of the size of the PS shell phase and, the addition of PP‐ g ‐PMMA did not seem to have any effect on the diameter of PMMA. The difference observed between the different morphologies relied on the number of droplets of core within the shell. All the phenomenological models predictions corroborated the experimental results, except when PP‐ g ‐PMMA was added to the blend.