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Phase transition, structure/properties of poly(p-phenylene terephthalamide) films post-polymerized by pyridine in NMP/CaCl2 solvent

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Summary

During polymerization of PPD(para-phenylene diamine) and TPC(terephthaloyl chloride) in NMP/CaCl2 solvent, the pahse transition from isotropic to anisotropic phase was investigated. A reaction-induced transition point can be confirmed by a flat plateau indicative of the development of anisotropic phase in the torque-time curve and also can be identified by the striated band structure under shear. Water and pyridine were used as the coagulating agent. Due to the post polymerization effect, the structures (crystallinity, orientation, fibrillation) and properties of films were affected by the shear given during the coagulation in pyridine.

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Authors and Affiliations

  1. Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, Cheongryang, P.O. Box 131, Seoul, Korea

    Moo San Rhim & Sung Chul Kim

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  1. Moo San Rhim
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  2. Sung Chul Kim
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Rhim, M.S., Kim, S.C. Phase transition, structure/properties of poly(p-phenylene terephthalamide) films post-polymerized by pyridine in NMP/CaCl2 solvent. Polymer Bulletin 23, 287–293 (1990). https://doi.org/10.1007/BF01032443

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