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Morphology and mechanical properties of poly(propylene)/polystyrene blends compatibilized with polystyrene-block-poly(ethylene-copropylene)Radonjič, Gregor ; Musil, VojkoCompatibilizing effects of diblock copolymer polystyrene-block-poly(ethylene-co-propylene) (SEP) on the morphology and mechanical properties of immiscible blends of poly(propylene) (PP) were ... investigated. Notched impact strength, yield stress, elongation at yield and Young's moduls were determined as a function of different weight rations of PP and PS and different amounts of added SEP as well. Scanning electron microscopy revealed a two-phase morphology of PP/PS blends, which exhibit poor mechanical properties. Even 2,5 wt.-% of SEP added to PP/PS blends can improve the notched impact strength and elongation at yield compared to non-compatibilized PP/PS blends. 10 wt.-% of SEP compatibilizer converted the brittle PP/PS blend to quite impact-resistant polymeric material. Mechanical properties were improved because of the morphological changes and increased interfacial adhesion as a result of SEP localization between PP and PS phases.An analysis of yield stress data in terms of theoretical models showed that yield stress values of binary PP/PS blends can be predicted with Nielsen's model.Source: Die angewandte makromolekulare Chemie. - ISSN 0003-3146 (251, št. 4370, 1997, str. 141-156)Type of material - article, component partPublish date - 1997Language - englishCOBISS.SI-ID - 3729692
Author
Radonjič, Gregor |
Musil, Vojko
Topics
kemija |
morfologija |
mehanske lastnosti |
analiza |
modeli
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Radonjič, Gregor | 11244 |
Musil, Vojko | 07545 |
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