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The Molten State

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Fundamental Polymer Science

Part of the book series: Graduate Texts in Physics ((GTP))

Abstract

Rheology, which is the first topic of this chapter, is the discipline which expresses relationships between stress and strain in liquids. This is an essential base for polymer processing. The molten state of polymers is more dependent on the molar mass than any of the other physical states. Flexible-chain polymer molecules possess random conformations in the molten state and the coiled molecules entangle in high molar mass polymers. Chain entanglements are important for the rheological properties of the melt. The second part of this chapter deals with the rheology of flexible-chain polymer melts. A discussion is presented of the deformation mechanisms in entangled melts involving reptation, also including the theoretical aspects. The final section of this chapter presents a comprehensive review of the structure and properties (also including the rheological properties) of liquid crystalline polymers.

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Authors and Affiliations

  1. Fibre and Polymer Technology School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, Stockholm, Sweden

    Ulf W. Gedde & Mikael S. Hedenqvist

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  1. Ulf W. Gedde
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  2. Mikael S. Hedenqvist
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Gedde, U.W., Hedenqvist, M.S. (2019). The Molten State. In: Fundamental Polymer Science. Graduate Texts in Physics. Springer, Cham. https://doi.org/10.1007/978-3-030-29794-7_6

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