Journal ArticleDOI
The transverse straining of orientated “silvery” polyethylene terephthalate films
TLDR
The possibility of straining PETPH films in a direction perpendicular to the initial stretching axis has been demonstrated in this article, where it was shown that the change in mechanical character of the films corresponds to the structural rearrangement.Abstract:
The possibility of straining “silvery” PETPH films in a direction perpendicular to the initial stretching axis has been demonstrated. Stretching in the transverse direction proceeded uniformly without necking up to 3.5–4.0 times over a wide temperature range, from 30° up to the temperature corresponding to maximum crystallization. Structural changes in the transverse stretching process were studied and it was shown, moreover, that the change in mechanical character of the films corresponds to the structural rearrangement.read more
References
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Journal ArticleDOI
A study of molecular orientation in drawn and shrunk poly(ethylene terephthalate) by means of birefringence, polarized fluorescence and X-ray diffraction measurements
J.H. Nobbs,D.I. Bower,I. M. Ward +2 more
TL;DR: In this article, the second order Legendre polynomial was used to derive the expected relationship between the orientation and the degree of crystallinity of poly(ethylene terephthalate) tapes.
Journal ArticleDOI
The crysallization of poly(ethylene terephthalate) during cold drawing
TL;DR: In this paper, the authors studied the crystallization of amorphous poly(ethylene terephthalate) during cold drawing by differential thermal analysis and dielectric loss methods.
Journal ArticleDOI
Fine block structure and properties of polymers
TL;DR: In this paper, a description of experimental results which confirm the assumption concerning the existence in the structure of polymers in the amorphous state of continuous chains capable of adopting truly random conformations is given.