Effect of annealing cold drawn polycarbonate below Tg
β Scribed by Brady, T. E. ;Yeh, G. S. Y.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1972
- Tongue
- English
- Weight
- 518 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0449-2986
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π SIMILAR VOLUMES
Many properties of glassy polymers undergo significant changes upon annealing 1. These changes which may be reversed with a brief heating to above the glass transition temperature, have,been related to enthalpy and/or free volume relaxation. As both enthalpy and free volume tend either increase or
## Abstract The microstructure of polypropylene, annealed after cold drawing to an oriented state, was examined using density measurements and smallβ and wideβangle xβray scattering (SAXS and WAXS) techniques. SAXS patterns were obtained after annealing (in an oil bath), and during annealing (of sa