Thermooxidative degradation of porous solvent-crazed polyethylene

The effect of the parameters of porous structure of HDPE prepared by the me thod of delocalized solvent crazing on the processes of thermooxidative deg radation and combustion was studied. According to TGA, with increasing the effective porosity, the weight loss of the polymer commences at lower tempe ratures; as orientational order is increased, temperature corresponding to the maximum weight loss rate increases by similar to 50 degreesC as compare d with that of the initial undeformed PE. In this case, one may observe a d ramatic change in the character of combustion of porous matrices compared t o the bulk samples: dripping processes are suppressed, and char formation t akes place.