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S3 Ciências dos Materiais |
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Title:
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MORPHOLOGY OF POLYMER FILMS OF POLYVINYL CHLORIDE/POLYAMIDE-6 BLENDS
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Summary :
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THE MORPHOLOGICAL BEHAVIOUR OF POLYMER FILMS OF POLYVINYL CHLORIDE (PVC)/POLYAMIDE-6 (PA-6) BLENDS WAS STUDIED BY SCANNING ELECTRON MICROSCOPY (SEM). THE SAMPLES WERE PREPARED BY CASTING, COPRECIPITATION AND PHASE SEPARATION FROM THF, FORMIC ACID AND NITROBENZENE/PHENOL SOLUTIONS. THE MORPHOLOGY OF THE BLENDS PREPARED BY COPRECIPITATION IS TYPICAL OF A BINARY BLEND CONTAINING ONE CRYSTALLIZABLE POLYMER. WHEN THE PVC IS THE MAJOR CONSTITUENT OF THE BLEND, A CRYSTALLINE HEDRITIC STRUCTURE (PA-6) DISPERSED ON A AMORPHOUS MATRIX (PVC) IS OBSERVED. WITH A HIGHER PA-6 CONTENT, SEM SHOWS SPHERICAL PVC PARTICLES DISPERSED ON A FIBROUS PA-6 MATRIX. FILMS OBTAINED BY PHASE SEPARATION SHOW A BETTER INTERACTION BETWEEN THE POLYMERS, WITH NON DISTINGUISHABLE PHASES.
KEYWORDS: MORPHOLOGY, POLYMER BLENDS, POLYVINYL CHLORIDE, POLYAMIDE-6
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Author :
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Espinoza, Marisa Quidel
Pezzin, Sergio Henrique
Rech Jr., Lourival
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Paper View :
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