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On the Structural and Mechanical Properties of Poly(Phenylacetylene) Truss‐Like Hexagonal Hierarchical Nanonetworks (Phys. Status Solidi B 12/2017)
Author(s) -
GrimaCornish James N.,
Grima Joseph N.,
Evans Kenneth E.
Publication year - 2017
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201770262
Subject(s) - auxetics , phenylacetylene , materials science , nanoscopic scale , honeycomb , hexagonal crystal system , graphyne , nanotechnology , condensed matter physics , composite material , crystallography , physics , chemistry , biochemistry , graphene , catalysis
Novel hierarchical nanoscale honeycombs built as poly(phenylacetylene) networks are shown to be capable of exhibiting auxetic behaviour out‐of‐plane (see Grima‐Cornish et al., article no. 1700190 ). These systems resemble crystalline forms of graphyne, graphdiyne, and other fully substituted equivalents but benefit from the presence of larger nanoscale pores which makes them less stiff and may enable them to be used in a wider range of applications such as nanofiltration. Their auxetic behaviour, i.e. the ability to expand laterally when uniaxially stretched (negative Poisson's ratio), is due to a mechanism which results in buckling of nanoribs present within the systems that are forced into compression as a result of an extension of ‘wine‐rack’‐like subunits to which they are connected. When combined with other properties characteristic of poly(phenylacetylene) systems, such as their high conductivity resulting from their extensive electronic delocalisation, these polymeric hierarchical honeycombs may provide a blueprint for the design of new multifunctional materials displaying enhanced and anomalous characteristics.