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Information Seminar Paper

Title

SURFACE TENSION CONSIDERATIONS IN COPOLYMER COMPATIBLIZED PP/EPDM/PA6 POLYMER BLENDS

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 Start Page | End Page

Abstract

 TERNARY POLYMER BLENDS BASED ON POLYPROPYLENE (PP)/POLYAMIDE6 (PA6)/ETHYLENE PROPYLENE DIENE MONOMER (EPDM) (70/15/15) WERE PREPARED BY MELT BLENDING USING TWIN SCREW EXTRUDER. MALEIC ANHYDRIDE GRAFTED ETHYLENE PROPYLENE DIENE MONOMER (EPDM-G-MA) WAS ALSO ADDED TO THE SYSTEM AS THE COMPATIBILZING AGENT. ACCORDING TO THE LITERATURE, THREE DIFFERENT MORPHOLOGIES ARE POSSIBLE IN TERNARY POLYMER BLENDS: SEPARATED DISPERSE, CORE/SHELL AND ACORN TYPE. EFFECT OF COMPATIBILIZER ON THE MORPHOLOGY OF THE BLENDS WERE INVESTIGATED AT THREE DIFFERENT RATIOS OF EPDM/EPDM-G-MA AS 75:25, 50:50 AND 25.75. SPREADING COEFFICIENTS PREDICT THE THERMODYNAMIC DRIVEN MORPHOLOGY OF TERNARY BLENDS AS CORE/SHELL TYPE. SCANNING ELECTRON MICROSCOPY (SEM) MICROGRAPHS OF THE SAMPLES DEPICTED THAT THE COMPATIBILIZER COMPOSITION DOES AFFECT THE EPDM SHELL THICKNESS AND ALSO THE OVERALL SIZE OF COMPOSITE DROPLETS DISPERSED WITHIN THE POLYPROPYLENE MATRIX BUT DO NOT ALTER THE CORE/SHELL TYPE OF MORPHOLOGY DRIVEN BY THE THERMODYNAMIC OF INVESTIGATED TERNARY SYSTEM.

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