Synthesis and characterization of polyimide/modified mCOC composites |
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| Authors: | Yao-Yi Cheng Hsin-Min Hsiao Zong-Xuan Li Ming-Jaan Ho Mao-Feng Hsu Shou‐Jui Hsiang |
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| Affiliation: | 1. Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei, Taiwan, Republic of China;2. Zhen Ding Technology Holding Limited, Taoyuan, Taiwan, Republic of China |
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| Abstract: | Two types of monomers, 4,4′‐(hexafluoroisopropylidene) diphthalic anhydride and 4,4′‐oxydianiline, were employed to synthesize poly(amic acid) (PAA) as a precursor of polyimide (PI). Through the addition of modified metallocene cyclic olefin copolymer (mCOC), PAA/mCOC composites were formed. PI/mCOC composites were obtained through a blade coating and multistep thermal curing process. The structure of the prepared PI/mCOC composites was characterized through Fourier transform infrared spectrometry. The results showed that the copolymerization of PAA and modified mCOC improved thethermal stability and hydrophobic and electrical properties of the PI/mCOC composites. The formation of a network structure between PI and modified mCOC considerably reduced the mobility of PI molecules, thereby improving the glass transition temperature and thermal properties of the composite. The thermal and hydrophobic properties were improved by increasing the mCOC grafting ratio. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 44144. |
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| Keywords: | composites grafting polyimides |
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