Synthesis of Segmented Poly(Arylene Ether Sulfone)-Poly(Arylene Terephthalate) Copolymers
The possible morphologies which can be obtained in a two component block or segmented copolymer are rubber-rubber, glass-rubber, crystalline-rubber, glass-glass, glass-crystalline, and crystalline-crystalline. The first three of these morphological combinations compose the vast majority of block or segmented copolymers synthesized. 1,2 Especially prevalent are the copolymers composed of glass-rubber morphologies. A typical example of such a copolymer based on “hard” and “soft” segments would be a styrene-butadiene-styrene (SBS) block copolymer.3 This copolymer is made up of two blocks of styrene, which comprise the “hard” segments, and one block of butadiene representing the “soft” segment. The “hard” or glassy segment is below its glass transition temperature at the temperature of interest, which is usually ambient temperature, while the “soft” or rubbery segment is above its glass transition temperature. Thus, this class of copolymers have become very important in the area of thermoplastic elastomers and related materials and have found commercial applicability in a wide range of products.
KeywordsDifferential Scanning Calorimetry Glass Transition Temperature Block Copolymer Intrinsic Viscosity Phase Transfer Catalyst
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- 1.A. Noshay and J.E. McGrath, “Block Copolymers: Overview and Critical Survey”, Academic Press, 1977.Google Scholar
- 3.M. Morton, J.E. McGrath, and P.C. Juliano, J. Poly. Sci., Part C, 26, 99 (1969)Google Scholar
- 5.R. Viswanathan, “Synthesis and Characteristics of Poly Arylene Ether Sulfones”, Ph.D. Dissertation, Virginia Polytechnic Institute and State University (1981).Google Scholar
- 6.D.C. Webster and J.E. McGrath, “Contemporary Topics in Polymer Science,” Vol. 4, William J. Bailey and Teiji Tsuruta, Editors, Plenum Publishing Corp., 1984, p. 959–975.Google Scholar
- 7.I. Dubrovina, M.A. Ponomareva, and S.A. Paulova, Vysoklmol. Soedin, Ser. B. 24 (1), 26, 1982; C. A. 96, 163422K (1982).Google Scholar
- 8.D.K. Mohanty, J.L. Hedrick, K. Gobetz, B.C. Johnson, I. Yilgor, E. Yilgor, R. Yang, and J.E. McGrath, Polym. Preprints, 23 (1), 284 (1982); D.K. Mohanty, Ph.D. Thesis (1983).Google Scholar
- 9.R.N. Johnson, A.G. Farnham, R.A. Clendinning, W.F. Hale, and C.N. Merriam, J. Polym. Sci., A-l, 5, 2375, (1967)Google Scholar
- 10.A.J. Wnuk, T.F. Davidson, and J.E. McGrath, J. Appi. Polym. Sci. Appi. Polym. Symp 34, 89–101, (1978).Google Scholar