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Transcrytalline structures and crystallization kinetics of Polyarylate/Nylon6 Islands-in-a-Sea conjugate fibers for high performance thermoplastic composite applications

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Abstract

We report the isothermal and non-isothermal crystallization kinetics and associated transcrystalline morphological features of polyarylate(PAR)/nylon6 islands-in-a-sea fibers, where 74 PAR islands serve as reinforcing fibers and nylon6 sea component acts as a semicrystalline matrix in final thermoplastic composites. The temperature-dependent polarized optical microscopic images obtained during a cooling process exhibit that the melt-crystallization is dominated by the interfacial crystallization of nylon6 on the surface of PAR fibers, leading to developing a transcrystalline structure. From the isothermal and non-isothermal melt-crystallization analyses of the islands-in-a sea fiber by using differential scanning calorimetry and the Avrami equation, the overall crystallization rates of the nylon6 sea component in the islands-in-a-sea fiber are found to be highly accelerated by the heterogeneous nucleating effect of the PAR island fibers. In addition, it is revealed that the isothermal and non-isothermal melt-crystallization kinetics of the nylon6 in the islands-in-a-sea fibers consists of two different mechanisms of the primary crystallization owing to the interfacial crystallization and the secondary crystallization due to the bulk crystallization.

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Authors and Affiliations

  1. Korea Institute of Industrial Technology, Cheonan, 31056, Korea

    Wan Gyu Hahm

  2. Agency for Defense Development, Daejeon, 34188, Korea

    Jong Kyoo Park

  3. Department of Advanced Organic Materials and Textile System Engineering, Chungnam National University, Daejeon, 34134, Korea

    Jinho Park, Sung Chan Lim, Jong Sung Won, Seung Goo Lee & Young Gyu Jeong

Authors
  1. Jinho Park
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  2. Sung Chan Lim
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  3. Jong Sung Won
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  4. Seung Goo Lee
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  5. Wan Gyu Hahm
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  6. Jong Kyoo Park
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  7. Young Gyu Jeong
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Correspondence to Young Gyu Jeong.

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Park, J., Lim, S.C., Won, J.S. et al. Transcrytalline structures and crystallization kinetics of Polyarylate/Nylon6 Islands-in-a-Sea conjugate fibers for high performance thermoplastic composite applications. Fibers Polym 17, 827–835 (2016). https://doi.org/10.1007/s12221-016-6443-6

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  • DOI: https://doi.org/10.1007/s12221-016-6443-6

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