UCV Basic Science Color Atlas STEP 1

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30 c. G. WILLSON ET AL. Although this partial chain degradation phenomenon is a problem, these results are nevertheless interesting as the chemical modification route affords easy access to otherwise inaccessible copolymers with fully substituted carbon atoms adjacent to the sulfone functionalities. It is expected that changes in reaction conditions might result in less degradation of the poly(styrene sulfone) chains. Approaches toward this goal are under study. EXPERIMENTAL Preparation of poly(styrene sulfone).

It has been suggested 21 that a contribution to the mechanism of the acceleration effect of methanol can be due to the radio lytic scavenging properties of styrene 21 ,23,24 and hence the relative numbers of styrene molecules and methanol radicals. This radio1ytic theory was originally developed for the grafting of styrene in solvent to ce11u10se 21 • The present solvent data for the grafting of styrene to the po1yo1efins can also be explained by the same general radio1ytic theory. In a grafting system consisting of po1yo1efin (PH), styrene monomer M and solvent SH, the theory predicts that the following sequence of reactions will occur under irradiation.

Patent 3,884,695 (1975), J. Electrochem. Soc. 122, 1370-4 (1975); M. J. Bowden and L. F. , 121, 1620-3 (1974). K. J. Ivin and J. B. Rose, Adv. Macromol. l, 335 (1968). R. E. Cais, J. H. O'Donnell and F. A. Bovey, Macromolecules 10, 254 (1977). M. Matsuda, M. Lino and N. Tokura, Makromol Chem. 65, 232 (1963). C. Schneider, J. Denaxas and D. Hummel, J. Polym. , Part C, 16, 2203 (1967). W. G. Barb, J. Polym. Sci. 10, 49 (1953); C. Walling, J. Polym. Sci. 16, 315 (1955). N. Tokura and M. Matsuda, Kokyo Kagaky Zasshi 64, 501 (1961); M.

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