Abstract
Intensities of small-angle X-ray scattering of a poly(tetraoxane) system, on both the direction of the equator and that of the meridian, increase by reducing the amount of unreacted tetraoxane, indicating the formation of voids.A broad scattering maximum in the meridian besides a spot-like scattering corresponding to 100-Å spacing was observed in a polymer prepared at 105°C. The broad maximum shifts to a low angle by annealing the sample below 140°C, i.e., at a temperature range which has no influence on the polymer chain aggregation. The shift is associated with the sublimation of the unreacted monomer or the thermal decomposition of low-molecular-weight polymer. These materials are held in voids formed periodically on the fibrillar polymer crystal.The fibrillar structure of poly(tetraoxane) seems to be an extended polymer chain aggregation with a periodic void appearance, i.e., a stacking of crystallites along the c-axis, while a lamellar crystal corresponding to 100-Å spacing situates between these fibrils.
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Nakase, Y., Kato, T., Yoda, O. et al. Small-Angle X-Ray Scattering of Poly(tetraoxane) Obtained by the Radiation-Induced Solid-State Polymerization. Polym J 9, 605–611 (1977). https://doi.org/10.1295/polymj.9.605
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DOI: https://doi.org/10.1295/polymj.9.605