The kinetics of the "cold crystallization" of poly(ethylene terephthalate) (PET) pre-orientated yarns are investigated both in isothermal and in non-isothermal dynamic conditions. The amorphous-crystalline, solid-solid transformation is analyzed in terms of the Avrami equation and of Ozawa's theory.
Molecular orientation in biaxially oriented sheets of poly(ethylene terephthalate) II. Correlation of orientation averages with measured mechanical compliances
β Scribed by D. I. Bower; D. A. Jarvis; E. L. V. Lewis; I. M. Ward
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- English
- Weight
- 572 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0887-6266
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Poly(ethylene terephthalate) (PET) fibers with wide range of molecular orientation and crystallinity were prepared by the cold drawing of melt-spun yarns in a temperature-controlled water bath and the subsequent annealing for these samples. For all samples, the true stress-strain curves can be princ
## Abstract Earlier studies of the orientation of the crystalline and amorphous regions in drawn and shrunk PET tapes by refractive index, Xβray, and polarized fluorescence measurements have been extended to include a study of young's modulus of such samples. The results show that for samples of lo