Premium
Design of auxetic polymer self‐assemblies
Author(s) -
Wei Gaoyuan
Publication year - 2005
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.200460391
Subject(s) - auxetics , supermolecule , supramolecular chemistry , materials science , block (permutation group theory) , self assembly , lattice (music) , copolymer , metastability , polymer , nanotechnology , geometry , composite material , mathematics , physics , crystallography , chemistry , crystal structure , molecule , quantum mechanics , acoustics
Alternating copolymers having a double‐arrow‐like “hard” block and a spring‐like “soft” segment have been designed which can in principle self‐assembly into two‐dimensional supramolecular networks. Molecular‐mechanics calculations show that such self‐assemblies can be auxetic when the lengths of the block and the segment are carefully chosen, with one metastable supermolecule having one of its six Poisson ratios as negatively large as –11.86. The underlying principle of designing such auxetic self‐assembly of copolymers with specified architecture is also given as are the deciding factors such as the packing geometry and the associated lattice energy in achieving the auxeticity. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)