Nonlinear Creep Behavior of Polyethylene modified by an Amorphous Maleated Polyethylene

摘要

Nonlinear creep in semicrystalline polymer films used above their glass transition is an interesting area of research. The amorphous fraction of the semicrystalline polymer has long been thought to be a significant contributor to creep deformation. In this paper we investigate blown films of linear low-density polyethylene (LLDPE) modified by an amorphous polyethylene grafted maleic anhydride (aPE-g-MA). The addition of the elastomeric material was found to enhance the tensile and creep properties of PE. Nonlinear creep was analyzed by examining creep and recovery of the films using a Burger model at different temperatures. A consistent decrease in unrecoverable plastic strain was obtained in the modified LLDPE samples.