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Poisson's Ratio of Monodomain Liquid Crystalline Elastomers
Author(s) -
Ren Wanting,
McMullan Philip J.,
Griffin Anselm C.
Publication year - 2008
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200800265
Subject(s) - poisson's ratio , elastomer , perpendicular , materials science , extrapolation , poisson distribution , anisotropy , modulus , liquid crystal , composite material , strain (injury) , optics , physics , geometry , mathematics , mathematical analysis , optoelectronics , medicine , statistics
Monodomains of smectic C liquid crystalline elastomers were prepared by controlled stretching of a polydomain thin film. Specimens were prepared from this film for stress–strain study. A Poisson's ratio of zero was found at small strains for uniaxial stretching perpendicular to the director. For uniaxial strain parallel to the director, Poisson's ratios of approximately 0.4–0.5 were found (by extrapolation) for very small strains. A modulus anisotropy of 8 was found for stretching parallel versus perpendicular to the director.