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Polymers 2019, 11(3), 477; https://doi.org/10.3390/polym11030477

Enhancement of the Mechanical Properties of Polyimide Film by Microwave Irradiation

Department of Chemistry, Yonsei University, Wonju, Gangwon-do 26493, Korea
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Received: 16 January 2019 / Revised: 5 March 2019 / Accepted: 7 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Advanced Engineering Plastics)
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Abstract

Polyimide films have conventionally been prepared by thermal imidization of poly(amic acid)s (PAAs). Here we report that the improvement of tensile strength while increasing (or maintaining) film flexibility of polyimide films was accomplished by simple microwave (MW) irradiation of the PAAs. This improvement in mechanical properties can be attributed to the increase in molecular weight of the polyimides by MW irradiation. Our results show that the mechanical properties of polyimide films can be improved by MW irradiation, which is a green approach that requires relatively low MW power, very short irradiation time, and no incorporation of any additional inorganic substance. View Full-Text
Keywords: polyimide film; microwave; molecular weight; tensile strength; film flexibility; end group reaction polyimide film; microwave; molecular weight; tensile strength; film flexibility; end group reaction
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Choi, J.-Y.; Jin, S.-W.; Kim, D.-M.; Song, I.-H.; Nam, K.-N.; Park, H.-J.; Chung, C.-M. Enhancement of the Mechanical Properties of Polyimide Film by Microwave Irradiation. Polymers 2019, 11, 477.

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