Viscoelastic Properties of Organic Fiber/Glass Fiber Filled Hybrid Composites in Molten State

摘要

The purpose of this study is to investigate the influence of different type of fibers on the rheological properties of hybrid composite materials. Long and short glass fibers (GF), different type of organic fibers, viz centre dot aramid fiber (KF), liquid crystalline polymer (LCP) and vinylon (VF) in hybrid composites, were used to reinforce the high density polyethylene (PE) matrix. Long fiber hybrid composites were prepared by a fiber separating and flying machine ", while the short fiber hybrid composites were prepared by an elastic extruder ". The total amount of fibers used in both long and short fiber hybrid composites was filled at 20 vol. percent. Viscoelastic properties of these composites in molten state were measured by parallel plate rheometer. The influence of fiber characteristics, length, mixing ratio, and also flow conditions such as angular frequency and strain amplitude on viscoelastic properties was studied. These properties were also compared with the viscoelastic properties of thesehybrid composites in the solid states.