Abstract
Effects of physical aging and heat-treatment on the viscoelastic and ultrasonic properties of poly[1-(trimethylsilyl)-1-propyne] (designated as PTMSP) films were examined. The loss modulus and loss tangent decreased with physical aging and heat-treatment, and the attenuation coefficient increased. However the storage modulus and ultrasonic velocity little changed with heat-treatment. This indicates that no conformational change occurs in backbone carbon with physical aging and heat-treatment, but aggregation of substituents may change. Accordingly, reduction in gas-permeability with physical aging is ascribable to the change in the aggregation of substituents. Furthermore, we found that casting solvents and catalysts affect viscoelastic and ultrasonic properties of PTMSP films as well as gas-permeability.
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Tanaka, A., Nitta, Kh., Maekawa, R. et al. Effects of Physical Aging on Viscoelastic and Ultrasonic Properties of Poly[1-(trimethylsilyl)-1-propyne] Films. Polym J 24, 1173–1180 (1992). https://doi.org/10.1295/polymj.24.1173
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DOI: https://doi.org/10.1295/polymj.24.1173