Dresden 2003 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 20: POSTER A
CPP 20.5: Poster
Montag, 24. März 2003, 19:00–21:00, ZEU/250
Blend morphology and mechanical properties of syndiotactic polystyrene in an epoxy resin — •Jaap Schut1,2, Nikolaos Zafeiropoulos1, Manfred Stamm1, Michel Dumon2, and Jean-Francois Gerard2 — 1Dept. Structure and Mechanics, Institute of Polymer Research, Dresden, Germany — 2Lab. of Macromolecular Materials, UMR CNRS 5627 INSA Lyon, Villeurbanne, France
Syndiotactic polystyrene (sPS) is usually processed at temperatures above 290C due to its high melting point, which is close to its degradation temperature. To facilitate the processing of sPS we have lowered its melt temperature and viscosity through the use of a curable epoxy/amine system as a reactive solvent, which resulted in phase-separated thermoplastic-thermoset polymer blends. The sPS-epoxy monomer phase diagram has been established. It shows a 20 to 60C melting point and crystallisation temperature depression depending on composition. We have investigated the blend morphology by SEM and TEM. Crystallisation can be used to tailor the blend morphologies by choosing the thermal history. We have also examined the influence of the epoxy monomer(s) on the crystallisation of sPS by means of optical microscopy, DSC, WAXS and SAXS. It caused a decrease of the spherulitic growth rate, but an increase in crystallinity and long period. We are currently performing mechanical tests to study the morphology-mechanical properties relationship.