Synthesis and properties of HDPE-g-MAH fibers

摘要

In the present work, maleic anhydride grafted high density polyethylene (HDPE-g-MAH) was synthesized in the way of free radical reaction. The graft polymer was spun into fibers by melting spinning at 260 °C. The chemical structure, thermodynamic properties of HDPE-g-MAH was characterized by Fourier transform infrared (FT-IR), Differential Scanning Calorimeter (DSC) and thermogravimetric analysis (TGA), respectively. The fracture and surface morphologies of HDPE-g-MAH fibers were measured by scanning electron microscopy (SEM). The results showed that maleic anhydride had successfully grafted onto the backbone of HDPE. Grafting ratio was mainly determined by initiator and the proportion of MAH/BPO. The melting temperature became lower after graft process while the crystallization temperature came up. The thermal stability was improved by the graft process, but the effect was not so obvious. The micropores and mastoids could be seen at the similar size in these fibers. The micropores might lead to better energy absorption when these composites were grafted to the backbone.