EFFECT OF MOLECULAR ARCHITECTURE OF PE ON STRUCTURAL CHANGES OF PVC IN PVC/PE MELT-BLEND

摘要

This paper studied the effect of molecular architecture of PE on structural changes of PVC in PVC/PE blends. The thermal property results indicated that PE in the blend between PVC and PE affected the degradation mechanism of PVC. This was explained in terms of a macro-radical cross-recombination reaction between PVC and PE molecules which was confirmed by considering the chemical shift in Carbon-13 Nuclear Magnetic Resonance. The changes in decomposition and glass-transition temperature of PVC in PVC/PE blends were also affected by types and melt flow indexes of the polyethylene.