The relaxation behavior of amorphous pet in global chain orientation but nearly random segmental orientation (golr) state

摘要

The deformations of polymeric material, such as melt flow, high elastic deformation and orientation of segment and side chain, etc., are all accomplished by combination internal-rotation of C-C bond of molecular chain. The relaxation behavior of polymers that subjeected to the effect of external force and/or extermal electric field, can be catalogued into two components, the orientation relaxation of coil as a whole and that of local of molecular chain.