THE EFFECT OF COPOLYMER ARCHITECTURE ON THE COMPATIBILITY OF BLENDS OF �SYNTHETIC MACROMOLECULES
Abstract
THE MAIN OBJECTIVE OF THIS THESIS IS THE INVESTIGATION OF THE EFFECT OF ARCHITECTURE OF EPOXIDIZED BLOCK COPOLYMER OF POLY(STYRENE-B-BUTADIENE), ON THE COMPATIBILIZATION OF COMMODITY PLASTICS; PVC, PS, CPE. THIS OBJECTIVE IS BOTH OF PRACTICAL AND THEORETIC SIGNIFICANCE; IS THE COMPATIBILIZATION OF INCOMPATIBLE COMMODITY PLASTICS TO OBTAIN USEFUL PRODUCTS AND THE INVESTIGATION OF THE INFLUENCE OF POLYMER ARCHITECTURE ON POLYBLEND COMPATIBILITY.THE PARAMETERS EXAMINED IN BOTH BINARY AND TERNARY BLENDS WERE: 1) THE COPOLYMER ARCHITECTURE, 2) THE DEGREE IN EPOXIDATION OF THE COPOLYMER (COMPATIBILIZER), 3) THE DEGREE OF CHLORINATION (PVC, CPE), 4) THE BLEND COMPOSITION. THE MAIN CONCLUSION WAS THAT THE COMPATIBILIZING EFFECTIVENESS IS REDUCED IN THE SEQUENCE, LINEAR (DIBLOCK, TRIBLOCK) > 3-ARM STAR > BRANCHED COPOLYMER, IN ACCORD WITH THERMODYNAMIC THEORY (CONFORMATIONAL ENTROPY CHANGE FOR MIXING).
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