REACTIVE BLENDS OF POLYVINYL CHLORIDE AND POLYURETHANE

摘要

Effects of PVC resin and PVC stabilizer on thermoplastic polyurethane (TPU) polymerization kinetics are studied using DSC and adiabatic temperature rise measurements. Addition of PVC results in partial absorption of the unpolymerized polyester component of the TPU mixture resulting and lowers the rate of reaction. Thermal characterization of melt and reactive blends of PVC and TPU showed one glass transition indicating miscibility. However, SEM revealed that the PVC/TPU melt blend contained small PVC primary particulates dispersed in the TPU matrix. The PVC/TPU reaction blend exhibited no observable PVC particulates under the same magnification.