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Long‐Range Processing Correlation and Morphological Fractality of Compatibilized Blends of PS/ HDPE/ SEBS Block Copolymer
Author(s) -
Jelčić Želimir,
Vranješ Nina,
Rek Vesna
Publication year - 2010
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.201050401
Subject(s) - high density polyethylene , materials science , compatibilization , composite material , rheology , polymer blend , polystyrene , plastics extrusion , extrusion , polyethylene , izod impact strength test , copolymer , polymer , ultimate tensile strength
Abstract Summary: Processing and compatibilization effects of a commercially available styrene/ ethylene‐butylene/ styrene (SEBS) compatibilizer on the morphological structure, rheological and mechanical properties of blends of polystyrene (PS) and high density polyethylene (HDPE) were investigated. The rheological behaviour of the blends melt during processing was followed by measuring torque; extrusion capacity output and melts back‐pressure in a twin screw extruder. The processing parameters were decreased with the HDPE content. The results show that SEBS compatibilizer can yield compatibilization by substantially reducing torque and increasing the back‐pressure. However, the Hurst indices of melt processing parameters are increased with compatibilization. Near‐infrared spectra had been described by the Hurst index H NIR which is then related to HDPE content in the blends. The correlation between the blend compositions, morphological structure, mechanical and rheological properties and processing parameters was established and discussed on base of correlation with the fractal indices obtained from the SEM microphotographs of PS/HDPE/SEBS blends.