Investigation of viscoelastic microscopic kinetics parameter for polymer alloys

• 1、Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, China

Abstract：Polymeric materials is the most important materials of soft matter, and its deformation behavior is colosely realted with temperature and strain rate. Rational constitutive models for finite strain behaviours of various polymeric materials is of substantial significance for product design and effective applications. In polymer constitutive model based on finite deformation and long-chain macromolecule net structure theory, material microscopic kinetics parameters bridge the macroscopic deformation behavior and microscopic mechanism. Some results has been presented in and outside of China. In this paper, impact compression tests were carried out for polymer alloy under different temperature and strain rate. Yield stess and some microscopic kinetics parameters, such as strain rate sensitivity index and activation energy, were calculted from these test results. Furthermore, the influence of temperature and component fraction on these paramteres was discussed in details.

Keywords： polymer viscoelastic kinetics strain rate sensitivity index activation energy