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Compression-induced anti-nematic order in glassy and semicrystalline polymers

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Abstract

We provide new insights into the molecular origin of the asymmetry between uniaxial tensile and compressive deformation of glassy and semicrystalline polymers using molecular dynamics simulations. The difference between the two responses strongly depends on the chain length and is the largest at intermediate chain lengths. Irrespective of chain length, the intra- and interchain organization of polymers under extension and compression are remarkably distinct. The chains align along the tensile axis leading to a global nematic order of the bonds and end-to-end vectors, whereas compression reorganizes polymers to lie in planes perpendicular to the compressive axis resulting in the emergence of an anti-nematic order and destruction of crystallinity. Regardless of the initial glassy or semicrystalline structure, the deformed state of polymers at large strains converge towards the same kind of structure that only depends on the deformation mode.

Graphical abstract: Compression-induced anti-nematic order in glassy and semicrystalline polymers

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Publication details

The article was received on 12 Sep 2019, accepted on 25 Nov 2019 and first published on 27 Nov 2019


Article type: Communication
DOI: 10.1039/C9SM01848D
Soft Matter, 2019, Advance Article

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    Compression-induced anti-nematic order in glassy and semicrystalline polymers

    S. Jabbari-Farouji and D. Vandembroucq, Soft Matter, 2019, Advance Article , DOI: 10.1039/C9SM01848D

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