Study on the Stress Relaxation Property of Degradable Polymer PLGA

Abstract

Multi-Microstructures are designed as the carriers of controlled drug delivery system, and the degradable polymer is the preferred material. When the deform method is hot embossing, the viscoelasticity of degradable polymer becomes one of the important parameters which affect the quality of microstructure. So the viscoelasticity and stress relaxation property of polymer is researched in this paper by experiment, and the numerical material model was established based on the generalized Maxwell model with 5 units by the Finite Element Method, The simulation results show that the model is reasonable and give the base for the research of optimum forming parameters of microstructure forming by hot embossing.