Mechanical properties and injection molding processability of glass fiber modified polylactic acid composites

Abstract In order to promote the development and application of environment-friendly plastics, a glass fiber-modified starch/polylactic acid composite was prepared by melt extrusion method. The influence fiber content on mechanical thermal properties studied, multi-objective optimization injection molding process carried out with consideration material properties. results show that increase from 0 5%, tensile strength decreases first then increases an average 60Mpa, which is about 30% higher than pure polylactic acid. elastic modulus stability increase, while elongation at break flow rate decrease content. addition, optimized parameters are obtained, can effectively reduce warping deformation, volume shrinkage, residual stress parts. Glass modified composites great potential in engineering application, may provide reference for high-performance green degradable materials.