Abstract
Ten members of a homologous series of side-chain liquid crystal polymers, the poly[[α-(4-methoxybiphenylyl-4′-oxy)-ω-alkyl]methacrylate]s, have been characterized using dynamic mechanical thermal analysis (DMTA) and dielectric thermal analysis (DETA). For the undecyl and dodecyl homologues both techniques revealed a smectic-smectic transition not detected in previous studies either by differential scanning calorimetry or by optical microscopy. It is proposed that this corresponds to a monolayer-bilayer smectic A transition. A weak transition at ca. -30 °C is detected using DMTA for polymers with spacer lengths 4–8 and by analogy with poly(methyl methacrylate) may indicate the absorption of small amounts of water. DMTA also proved to be particularly effective in deconvoluting transitions and for the propyl homologue established the existence of a smectic phase suggested by optical microscopy.
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References
C. Bowry and P. Bonnett, Opt. Comput. Proc. 1 (1991) 13.
G. R. Möhlmann and C. P. J. M. Van Der Vorst, in “Side chain liquid crystal polymers”, edited by C. B. McArdle (Blackie and Sons, Glasgow, 1989) Chap. 12.
T. Ikeda and O. Tsutsumi, Science 268 (1995) 1873.
V. Percec and D. Tomazos, in “Comprehensive polymer science”, First Supplement, edited by S. L. Aggarwal and S. Russo (Pergamon Press, Oxford, 1992) Chap. 14.
C. M. Haws, M. G. Clark and G. S. Attard, in “Side chain liquid crystal polymers”, edited by C. B. McArdle (Blackie and Sons, Glasgow, 1989) Chap. 7.
R. M. Kannan, J. A. Kornfield, N. Schwenk and C. Boeffel, Macromolecules 26 (1993) 2050.
R. H. Colbly, J. R. Gillmore, G. Galli, M. Laus, C. K. Ober and E. Hall, Liq. Cryst. 13 (1993) 233.
R. M. Kannan, S. F. Rubin, J. A. Kornfield and C. Boeffel, J. Rheol. 38 (1994) 1609.
R. Zentel and J. Wu, Makromol. Chem. 187 (1986) 1727.
P. Fabre and M. Veyssie, Mol. Cryst. Liq. Cryst. 4 (1987) 99.
G. P. Simon, A. Kozak, G. Williams and R. E. Wetton, Mater. Forum 15 (1991) 71.
A. A. Craig and C. T. Imrie, J. Mater. Chem. 4 (1994) 1705.
B. Hahn, J. H. Wendorff, M. Portugall and H. Ringsdorf, Colloid and Polymer Science 259 (1981) 875.
N. G. McCrum, B. E. Read and G. Williams, “Anelastic and dielectric effects in polymeric solids” (John Wiley and Sons, Chichester, 1967).
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Mulligan, D.R., Imrie, C.T. & Larcey, P. Characterization of side-chain liquid crystal polymers using dynamic mechanical thermal analysis and dielectric thermal analysis. JOURNAL OF MATERIALS SCIENCE 31, 1985–1989 (1996). https://doi.org/10.1007/BF00356617
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DOI: https://doi.org/10.1007/BF00356617