A study is reported of the similarities and differences in the cold drawing and annealing behavior of amorphous polycarbonate (PC) and semicrystalline polyethylene (PE) and polypropylene (PP). The recovery data for all three polymers cover a range of temperature and initial strains. From these kinetic data, activation-energy spectra characterizing the recovery process are derived using an analysis for processes distributed in activation energy. These spectra are centered about 22-24 kcal/mole for PC, 22 kcal/mole for PE, and 15 kcal/mole for PP, treating recovery in the temperature ranges 170°-150°C for PC, 70°-60°C for PE, and 90°-80°C for PP. The mean activation energies do not vary with the initial strain but seen to decrease with increasing recovery temperature.
ASJC Scopus subject areas
- Physics and Astronomy(all)