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Highly oriented low-modulus materials from liquid-crystalline polymers: the ultimate penalty for solubilizing alkyl side chains

A brief study of the effect of solubilizing, flexible alkyl side groups on the mechanical properties of highly oriented rigid-chain polymers is described. Experimental results obtained with poly(hexyl isocyanate) show that the side chains have a ruinous effect on the tensile modulus and stress at br...

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Bibliographic Details
Published in:Macromolecules 1990-11, Vol.23 (6), p.1842-1845
Main Authors: Postema, Aaldrik R, Liou, K, Wudl, Fred, Smith, Paul
Format: Article
Language:English
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Summary:A brief study of the effect of solubilizing, flexible alkyl side groups on the mechanical properties of highly oriented rigid-chain polymers is described. Experimental results obtained with poly(hexyl isocyanate) show that the side chains have a ruinous effect on the tensile modulus and stress at break. Simple calculations reveal that the attachment of n-hexyl side chains reduces the theoretical axial modulus of rigid-chain polyamides by approx 90%. 28 ref.--AA
ISSN:0024-9297
1520-5835
DOI:10.1021/ma00208a048