Morphology evolution during cooling of quiescent immiscible polymer blends: matrix crystallization effect on the dispersed phase coalescence
| Autor: | Bojan Dimzoski, Miroslav Šlouf, Ivan Fortelný, Antonín Sikora, Danuše Michálková |
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| Rok vydání: | 2012 |
| Předmět: |
Coalescence (physics)
Polypropylene Materials science Polymers and Plastics General Chemistry Ethylene propylene rubber Condensed Matter Physics law.invention chemistry.chemical_compound chemistry law Phase (matter) Materials Chemistry Polymer blend Particle size Crystallite Crystallization Composite material |
| Zdroj: | Polymer Bulletin. 70:263-275 |
| ISSN: | 1436-2449 0170-0839 |
| DOI: | 10.1007/s00289-012-0848-1 |
| Popis: | The influence of the matrix crystallization on the coalescence of the dispersed phase particles, in quiescent immiscible polymer blends, is a topic that is scientifically addressed scarcely. The coarsening of the phase structure that is induced by the matrix crystallizing domains was studied using the well-established system comprising a polypropylene and an ethylene–propylene rubber (PP/EPR blends). This subject is of great importance as the effectiveness in the toughening of PP is directly determined by the EPR particle size. Cooling experiments were commenced for resolving the correlation among the imposed cooling conditions, the formed matrix crystalline morphology, and the coalescence of the dispersed phase particles. A confirmation of the profound effect of the PP crystallization on the coalescence of EPR particles was undoubtedly obtained. The contribution of the crystallization to the coalescence of the dispersed phase particles is largest at a finite rate of cooling. A thorough discussion regarding the observed effects, encompassing a potential rejection or an engulfing of the dispersed phase particles by the growing crystallites, was undertaken. |
| Databáze: | OpenAIRE |
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