Abstract
A new method so called polymerization blending of polyamic acids was carried out in the solution of the precursor polyamide for rigid-rod polybenzothiazole (PBZT) as reinforcement, leading to the formation of PBZT-polyimide blend films. The morphology of the transparent films, obtained by the polymerization blending, casting, coagulation, and thermal treatment, was observed by scanning electron microscopy (SEM) in order to investigate the state of dispersion of the PBZT in the films. The SEM photographs showed that the PBZT was well dispersed at micro-level. Mechanical properties of the films were improved in modulus and tensile strength, which were corresponded well with the morphology of the films; furthermore, dynamic mechanical analysis was also performed to characterize the films consisted of respective polyimides as a matrix. The method of polymerization blending leads to an effective way to achieve the micro-composites consisted of the PBZT and the polyimides with ideal dispersion of the reinforcement and hence having excellent mechanical properties.
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Hattori, T., Kagawa, K., Kakimoto, Ma. et al. Preparation of New Polybenzothiazole–Polyimide Blends through Polymerization Blending of Polyamic Acids in Precursor Polyamide Solution for Polybenzothiazole. Polym J 27, 395–403 (1995). https://doi.org/10.1295/polymj.27.395
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DOI: https://doi.org/10.1295/polymj.27.395