By J. C. Salamone, J. S. Riffle (auth.), J. C. Salamone, Judy S. Riffle (eds.)
of Polymer Chemistry, Inc. of the yank Chemical Society held its The department fifteenth Biennial Polymer Symposium at the subject, "Advances in New Materials," November 17-21, 1990, on the Pier sixty six hotel and Marina in toes. Lauderdale, Florida. a 3 and one part day application was once offered via well-known leaders in significant parts of latest polymeric fabrics. the themes of the Biennial Symposium integrated new excessive functionality polymers, polymers for digital purposes, electrically accomplishing polymers, nonlinear optics, new polymer structures, and polymers derived from organic media. those are the topic parts of this quantity of "Contemporary subject matters in Polymer Science". The reason of the Symposium used to be to target fresh advances in polymeric fabrics. The technical periods have been complemented through an preliminary poster consultation which augmented a few of the technical periods. a selected spotlight of the assembly used to be the presentation to Professor Michael Szwarc of the 1990 department of Polymer Chemistry Award by way of Dr. J. L. Benham, Chairman of the T Aymer department. in the course of his Award tackle, Professor Szwarc defined how he had develop into a polymer chemist and later constructed "living polymers." undoubtedly, Professor Szwarc has made a profound contribution to the polymer box, which has yielded many new different types of residing polymerization.
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1. S. Pat. 3,274,214 (1966). (e) L. S. S. Pat. 3,155,683 (1964). 3. The melting point for Bisphenol A cyclic trimer (350°C) may be found in ref 2d and for cyclic tetramer (375°C) in ref 2c. 4. (a) D. J. Brunelle, E. P. Boden, and T. G. Shannon, J. Am. Chern. , 112:2399 (1990). (b) E. P. Boden, D. J. Brunelle, and T. G. Shannon, Polym. ~, 30(2), 571 (1989). (c) D. J. Brunelle, E. P. Boden, and T. G. S. Patent 4,727,134 (GE, 1988). (d) D. 1. Brunelle and T. G. S. Patent 4,644,053 (GE, 1987). (e) T.
0% of the amine used in a cyclization reaction would need to be consumed to form 10% polymer. Obviously, if the polymer unit is bis-capped, then twice as much amine would need to be consumed. Since there is no mechanism for decomposition of an acyl ammonium salt derived from DMAP, we reasoned that the polymer formed in a DMAP catalyzed reaction should be different from that formed when triethylamine is used as a catalyst. In fact, sampling over the course of a 30 minute cyclization reaction revealed that the MW of polymer formed with triethylamine did not change over the course of the reaction, but the MW of polymer formed using DMAP steadily increased (see Table 3).
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Advances in New Materials by J. C. Salamone, J. S. Riffle (auth.), J. C. Salamone, Judy S. Riffle (eds.)