UNIAXIAL DRAWING OF POLY(4-METHYL PENTENE -1) PREPARED AT DIFFERENT TEMPERATURES

The effect of processing temperature on the structure and mechanical p roperties of poly(4-methyl pentene-1) under uniaxial drawing at temper atures close to the glass transition temperature of the polymer was st udied. Initial stages of polymer deformation were shown to be associat ed with conformational changes in chain molecules and further drawing was accompanied by the breakdown of initial structure and its partial recrystallization. With increasing processing temperature, the develop ment of weaker supermolecular structures was observed, and the onset o f structural changes was shifted toward higher strains. Under polymer uniaxial drawing, the conversion of structural rearrangements was show n to increase with increasing processing temperature.