Research on Measurement Method for Polymer Melt Bulk Modulus of Elasticity

The paper gives an introduction of the experimental measurement method for bulk modulus of elasticity which is an important physical parameter of polymer melt. With Polypropylene as experimental material and through the mutual relationship analysis of experiment data, it is proposed in the paper the soft measurement model for the bulk modulus of elasticity of polymer melt established on the basis of BP neural network in accordance with the characteristics of neural network modeling and then on-line measurement of the bulk modulus of elasticity of polymer melt is realized. Both the experimental method and modeling method have innovative studies on method of measuring the bulk modulus of elasticity of polymer melt, and all these have significant and constructive guiding for the precision molding process of polymer.