Abstract
Vectra® liquid crystalline polymers (LCP's) were introduced as commercial products in the mid-1980's. The first of these (Vectra A130) was a wholly aromatic thermotropic copolyester ofp-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid. Vectra A130 is a thermotropic LCP that can be melt spun into filaments that on heat treatment are characterized by high strength and high modulus. Vectra resin can also be extruded into films. In the fiber or film form this material is commercially known as Vectran®. Heat treatment enhances the tensile strength of Vectran fiber variants. Because of this, the elucidation of the physical transformations taking place in the internal structure of the material during heating has always been an important subject. Several thermal techniques are used to indicate clearly that what is observed as a “glass transition” is unlike the conventional glass transition in typical semicrystalline polymers. There is also an indication of the presence of multiple states of mesophase aggregation that collapse into a single state when taken to high enough temperatures.
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References
M.-Y. Cao and B. Wunderlich, J. Polym. Sci., Polym. Phys. Ed., 521 (1985) 23.
S. Z. D. Cheng, Macromolecules, 2475 (1985) 21.
M.-Y. Cao, M. Varma-Nair and B. Wunderlich, Polymers for Advanced Tech., 1 (1990) 151.
M. Varma-Nair, A. Habenschuss and B. Wunderlich, Proc. 22nd NATAS, Atlanta 1992, p. 343.
H. N. Yoon and M. Jaffe, Abstract of Papers, ANYL-72, 185th American Chemical Society National Meeting, March 20–25, Seattle, Washington 1983.
M. Takayanagi, “Molecular Motions in Crystalline Polymers” in “Molecular Basis of Transitions and Relaxations”, ed. by D.J. Meier, Gordon and Breach, New York 1978.
G. Collins and B. Long, J. Appl. Polym. Sci., 53 (1994) 587.
M. J. Troughton, A. P. Unwin, G. R. Davies and I. M. Ward, Polymer, 29 (1988) 1389.
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Menczel, J.D., Collins, G.L. & Saw, S.K. Thermal analysis of Vectran® fibers and films. Journal of Thermal Analysis 49, 201–208 (1997). https://doi.org/10.1007/BF01987440
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DOI: https://doi.org/10.1007/BF01987440