Summary
A series of t-butyloxycarbonyloxy (t-hoc-oxy) attached polyamide (t-bocPA) as a polybenzoxazole (PBO) precursor was synthesized from poly(o-hydroxyamide) (PAOH) and its thermal conversion to PBO was investigated by using FT-IR, TGA and DSC. Most of the protecting group of t-bocPA was decomposed at 250 °C and the polymer converted to PBO at 350 °C. The thermal reaction for PBO formation was accelerated by the strong acid such as p-toluenesulfonic acid. It was revealed that photo-acid generator (PAG) can act not only as an acid generator on UV exposure, but also as a catalyst to lower the temperature of PBO formation.
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Received: 25 October 1999/Revised version: 27 December 1999/Accepted: 28 December 1999
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Kim, TK., Choi, KY., Lee, KS. et al. Thermal conversion of t-butyloxycarbonyloxy attached polyamides to polybenzoxazoles. Polymer Bulletin 44, 55–62 (2000). https://doi.org/10.1007/s002890050573
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DOI: https://doi.org/10.1007/s002890050573