Abstract
Isothermal crystallization of linear and crosslinked PTT has been studied in order to find the influence of crosslinking on the mechanism of crystallization. The samples were crystallized from the melt in the temperature range from 90 to 200°C and they were studied by roentgenographic, microscopic, and light scattering methods. It was found that the crosslinking does not change the structure of PTT crystallites. However, the influence on the type of spherulites formed is significant. In the linear polymer, depending on the crystallization temperature, spherulites of 0–90 (untwisted lamellae) and 45 (lamellae twisted at α≅45°) types of optical axis orientation were formed, while in the crosslinked system, only spherulites of 0–90 type were observed. This was explained to be a result of the presence of junctions, which make the twisting of the lamellae impossible.
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Daniewska, I. Influence of the Crosslinking on the Crystallization of Poly(tetramethylene terephthalate). Polym J 10, 495–497 (1978). https://doi.org/10.1295/polymj.10.495
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DOI: https://doi.org/10.1295/polymj.10.495