Giant dielectric response and hairpins in polymeric nematics

by: JMF Gunn, M Warner

Physical Review Letters, Vol. 58, No. 4. (26 January 1987), 393.

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Abstract

We show that; in contrast to normal polymers; a backbone nematic polymer; with dipoles along the chain axis; yields a dielectric susceptibility increased by a factor of the order of the degree of polymerization. We find (i) a purely exponential variation of susceptibility with temperature; partly reflecting the activiation of hairpin defects of chain conformations and (ii) nonlocality in the response; unlike isotropic polymers. The unusual form of these results suggests (macroscopic) dielectric experiments for finally observing hairpins and studying zero-field chain statistics.

@article{citeulike:1527582, abstract = {We show that; in contrast to normal polymers; a backbone nematic polymer; with dipoles along the chain axis; yields a dielectric susceptibility increased by a factor of the order of the degree of polymerization. We find (i) a purely exponential variation of susceptibility with temperature; partly reflecting the activiation of hairpin defects of chain conformations and (ii) nonlocality in the response; unlike isotropic polymers. The unusual form of these results suggests (macroscopic) dielectric experiments for finally observing hairpins and studying zero-field chain statistics.}, author = {Gunn, J. M. F. and Warner, M. }, citeulike-article-id = {1527582}, doi = {http://dx.doi.org/10.1103/PhysRevLett.58.393}, journal = {Physical Review Letters}, keywords = {wlc}, month = {January}, number = {4}, pages = {393+}, posted-at = {2007-08-01 14:21:35}, priority = {2}, publisher = {American Physical Society}, title = {Giant dielectric response and hairpins in polymeric nematics}, url = {http://dx.doi.org/10.1103/PhysRevLett.58.393}, volume = {58}, year = {1987} }

RIS record

TY - JOUR ID - citeulike:1527582 L3 - citeulike-article-id:1527582 TI - Giant dielectric response and hairpins in polymeric nematics JF - Physical Review Letters VL - 58 IS - 4 SP - 393 PB - American Physical Society N2 - We show that; in contrast to normal polymers; a backbone nematic polymer; with dipoles along the chain axis; yields a dielectric susceptibility increased by a factor of the order of the degree of polymerization. We find (i) a purely exponential variation of susceptibility with temperature; partly reflecting the activiation of hairpin defects of chain conformations and (ii) nonlocality in the response; unlike isotropic polymers. The unusual form of these results suggests (macroscopic) dielectric experiments for finally observing hairpins and studying zero-field chain statistics. KW - wlc AU - Gunn, JMF AU - Warner, M PY - 1987/01/26/ UR - http://dx.doi.org/10.1103/PhysRevLett.58.393 ER -

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