By George Odian (auth.), Joginder Lal, James E. Mark (eds.)
The current e-book is a sequel to "Elastomers and Rubber Elasticity," edited by way of J.E. Mark and J. Lal and released via the yankee Chemical Society in 1982. it's also in accordance with papers awarded at an ACS Symposium, subsidized by means of the department of Polymer Chemistry, Inc., for that reason one held in Chicago in September of 1985. The keynote speaker used to be to were seasoned fessor Paul J. Flory, and his premature dying simply ahead of the symposium used to be an immense loss to all of polymer technology, particularly to these in terested in elastomeric fabrics. it truly is to his reminiscence that this publication is devoted. there was loads of development in getting ready and learning elas tomers because the previous symposium, which used to be in 1981. relating to the synthesis and curing of elastomers, a lot of the historical past essential to an appreciation of those advances is given within the first, introductory chapter.
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Bywater, Y. E. Blaek, J. Polyrn. Sei. Polym. Chern. , ~, 669 (1984). S. J. Worsfo1d, J. Organornetal. , 159, 229 (1978). A. Garton and S. Bywater, Maerornoleeu1es, 8, 694 (1975). W. Langer, Polyrn. , Div. of Polymer Chernistry, Am. Chem. , 7(1), 132 (1966). V. COllet-Marti, S. Dumas, J. Sledz, and F. l, 251 (1982). S. H. J. Worsfold, J. Polym. Sei. Polym. ehem. , ~, 1997 (1985). 49 POLYURETHANE ELASTOMERS WITH MONODISPERSE SEGMENTS AND THEIR MODEL PRECURSORS: SYNTHESIS AND PROPERTIES Claus D. Box 6980, D-7500 Karlsruhe 1, FRG ABSTRACT Uniform model compounds for the soft and hard segment of polyurethane (PU) elastomers and the corresponding tailormade elastomers with monodisperse segment length distribution were synthesized and characterized with the objective of getting a better understanding of the structure and morphology as weIl as the structure-property relationships of multiphase segmented PU elastomers from the study of such clearly defined model systems.
E. , ACS Symp. Sero Am. Chem. , 212, 283 (1983). F. N. P. D. Mochel, Adv. Organornet. , ~, 55 (1980). F. F. Lohr and J. Hall, J. Polym. Sei. Polym. Chern. , ~, 1357 (1981). 9. io. 11. 12. 13. 14. S. Bywater, Y. E. Blaek, J. Polyrn. Sei. Polym. Chern. , ~, 669 (1984). S. J. Worsfo1d, J. Organornetal. , 159, 229 (1978). A. Garton and S. Bywater, Maerornoleeu1es, 8, 694 (1975). W. Langer, Polyrn. , Div. of Polymer Chernistry, Am. Chem. , 7(1), 132 (1966). V. COllet-Marti, S. Dumas, J. Sledz, and F.
TMEDA with both butadienyllithium and isoprenyllithium causes the NMR shift of the y peak to move upfield to near the 70 ppm region as does DIPIP with butadienyllithium below. DIPIP with isoprenyllithium behaves different1y. Figure 4a il1ustrates the position of the cis and trans y peaks with increasing DIPIP ratio, and it is seen that although the trans (minor) peak behaves norma1ly and finally moves to -70 ppm, the cis peak only moves part of the way. The cis peak is the major peak, and if the temperature of the measurements is dropped the rate of exchange between the solvates is slowed down sufficiently so that at -20 0 this peak splits into three separate peaks.
Advances in Elastomers and Rubber Elasticity by George Odian (auth.), Joginder Lal, James E. Mark (eds.)