Letter | Published:

A Secondary Process in the Liquid-induced Crystallization of Polyethylene Terephthalate

Naturevolume 199page902 (1963) | Download Citation

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Abstract

IT is known that amorphous polyethylene terephthalate may be crystallized by treatment with certain organic liquids1. With the polymer in the form of a film the process is accompanied by the appearance of opalescence, generally attributed to sub-microscopic spherulites, and is a function of time, temperature and film thickness2. In these investigations the thickness was at least equal to 2 × 10−2 cm. On extension of the work to include thinner films, it was observed that not only was there an increase of opalescence on treatment with a typical liquid such as acetone but also that after a certain time, afterwards referred to as an induction period, an almost opaque front was seen to move across the sample.

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References

  1. 1

    Kolb, J., and Izard, E. F., J. App. Phys., 20, 571 (1949). Moore, W. R., Richards, D. O., and Sheldon, R. P., J. Text. Inst., 51, T 438 (1960).

  2. 2

    Sheldon, R. P., Polymer, 3, 27 (1962).

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Affiliations

  1. Polymer Research Laboratories, Department of Chemical Technology, Institute of Technology, Bradford

    • L. COTTAM
    •  & R. P. SHELDON

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https://doi.org/10.1038/199902a0

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