Development of novel poly(phenylacetylene) network polymers and their mechanical behaviour

Auxetics exhibit the anomalous property of getting wider rather than thinner when uniaxially stretched, i.e. have a negative Poisson's ratio. This work presents the results of simulations performed on a number of hypothetical poly(phenylacetylene) networks which are meant to mimic the behaviour...

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Bibliographic Details
Published in:Physica Status Solidi. B: Basic Solid State Physics 2014-02, Vol.251 (2), p.375-382
Main Authors: Grima, Joseph N., Zerafa, Christine, Brincat, Jean-Pierre
Format: Article
Language:English
Subjects:
auxetic
deformation
Mechanical properties
Networks
novel structures
Poissons ratio
Polymers
Simulation
simulations
Solid state physics
Solvents
Triangles
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Summary:Auxetics exhibit the anomalous property of getting wider rather than thinner when uniaxially stretched, i.e. have a negative Poisson's ratio. This work presents the results of simulations performed on a number of hypothetical poly(phenylacetylene) networks which are meant to mimic the behaviour of rotating scalene triangles. It was shown that such systems do indeed exhibit a negative Poisson's ratio being as low as c. −1.2, i.e. lower than the c. −1 found in earlier systems. This negative Poisson's ratio is due to the relative rotation of nanoscopic units.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.201384254