Abstract
Blends of polypropylene and polystyrene compatibilized with styrene-butadiene-styrene (SBS) or styrene-ethylene/butylene-styrene (SEBS) copolymers were studied. The morphology of these blends was studied by Scanning Electron Microscopy. Emulsion curves relating the average radius of the dispersed phase to the concentration of compatibilizer added to the blend were obtained. The rheological behavior of the blends was studied by small amplitude oscillatory shear, and correlated to the morphological observations. The interfacial tension between the components of the blends was evaluated from the rheological data. In addition, the applicability of time-temperature superposition (TTS) method for PP/PS blend was studied.
Highlights
Research in the field of interfacial tension has been limited because of experimentalDue to the ability to combine the properties of difficulties encountered in its determination. their components in a unique product, polymer Recently, many efforts have been done to un-blends are being used for the development of new derstand better the relationship that exists between materials in a large number of industrial areas[1]. viscoelastic properties and morphology of polymerOne important feature of polymer blends is the blends
Due to the ability to combine the properties of difficulties encountered in its determination. their components in a unique product, polymer Recently, many efforts have been done to unblends are being used for the development of new derstand better the relationship that exists between materials in a large number of industrial areas[1]. viscoelastic properties and morphology of polymer
This can be the result of a better interaction between ethylene/butylene block (E/B) of SEBS and the polypropylene of PP/PS blend than between the butadiene of SBS and PP of PP/PS blend
Summary
Research in the field of interfacial tension has been limited because of experimentalDue to the ability to combine the properties of difficulties encountered in its determination. their components in a unique product, polymer Recently, many efforts have been done to un-blends are being used for the development of new derstand better the relationship that exists between materials in a large number of industrial areas[1]. viscoelastic properties and morphology of polymerOne important feature of polymer blends is the blends. The model described above can be used to infer interfacial tension if a secondary plateau is observed in the storage modulus curve. They could not infer interfacial tension for these blends because no secondary plateau was observed in the storage modulus (G’(ω)) of the blend as function of frequency.
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