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Processing-improved properties and morphology of PP/COC blends
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SYSNO ASEP 0362902 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Processing-improved properties and morphology of PP/COC blends Author(s) Vacková, Taťana (UMCH-V) RID
Šlouf, Miroslav (UMCH-V) RID, ORCID
Nevoralová, Martina (UMCH-V) RID, ORCID
Kaprálková, Ludmila (UMCH-V)Source Title Journal of Applied Polymer Science. - : Wiley - ISSN 0021-8995
Roč. 122, č. 2 (2011), s. 1168-1175Number of pages 8 s. Language eng - English Country US - United States Keywords polymer blend ; phase morphology ; fiber Subject RIV JI - Composite Materials R&D Projects GP106/09/P272 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40500505 - UMCH-V (2005-2011) UT WOS 000293741800053 DOI 10.1002/app.34258 Annotation The aim of this study was to improve mechanical properties of polypropylene/cycloolefin copolymer (PP/COC) blends by processing-induced formation of long COC fibers. We focused our attention on finding processing conditions yielding PP/COC fibrous morphology in a well-defined, reproducible way. A number of PP/COC blends were prepared by both compression molding and injection molding (IM). Neat polymers were characterized by rheological measurements, whereas phase morphology of the resulting blends was characterized by means of scanning electron microscopy. The longest COC fibers were achieved in the injection molded PP/COC blends with compositions 75/25 and 70/30 wt %. Elastic modulus and yield strength were measured as functions of the blend composition using an Instron tensile tester; statistically significant improvement of the yield strength due to fibrous morphology was proved. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2012
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