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Spinodal phase separation and isothermal crystallization behavior in blends of VDF/TrFE(75/25) copolymer and poly(1,4-butylene adipate) (I)

Spinodal phase separation behavior

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Abstract

Phase behavior and spinodal phase separation kinetics in binary blends of a random copolymer of vinylidene fluoride and trifluoroethylene (75/25) [P(VDF/TrFE)] and poly(1,4-butylene adipate) (PBA) have been investigated by means of optical microscopic observation and time-resolved light scattering. The blends exhibited a typical lower critical solution temperature (LCST)∼34 °C above the melting temperature of the P(VDF/TrFE) crystals over the entire blend composition range. P(VDF/TrFE) and PBA were totally miscible in the temperature gap between the melting point of P(VDF/TrFE) and the LCST. Temperature jump experiments of the 3/7 P(VDF/TrFE)/PBA blend were carried out on a light-scattering apparatus from a single-phase melt state (180 °C) to a two-phase region (205∼215 °C). Since the late stage of spinodal decomposition (SD) is prevalent in the 3/7 blend, SD was analyzed using a power law scheme. Self-similarity was preserved well in the late stage of SD in the 3/7 blend.

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Authors and Affiliations

  1. Department of Polymer and Fiber Materials Engineering, College of Environment and Applied Chemistry, Kyung Hee University, 449-701, Gyeonggi-do, Korea

    Kap Jin Kim & Thein Kyu

  2. Institute of Polymer Engineering, The University of Akron, 44325-0301, Akron, OH, USA

    Thein Kyu

Authors
  1. Kap Jin Kim
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  2. Thein Kyu
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Correspondence to Kap Jin Kim.

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Kim, K.J., Kyu, T. Spinodal phase separation and isothermal crystallization behavior in blends of VDF/TrFE(75/25) copolymer and poly(1,4-butylene adipate) (I). Fibers Polym 4, 188–194 (2003). https://doi.org/10.1007/BF02908277

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  • DOI: https://doi.org/10.1007/BF02908277

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