The relationship between the dynamic mechanical relaxations and the tensile deformation behaviour of polyethylene

摘要

The mechanical relaxation behaviour of high andlinear low density polyethylenes has been examind using tensiledynamic mechanical measurements and compared to thedeformation behaviour observed in tensile drawing . In this waythe relationship between the mechanical relaxations and thetensile deformation has been investigated. It is shown that thebrittle-ductile transition relates to theγ- relaxation while theyield behaviour is related to the interlamelllar shear process nadthe c-shear process.