Abstract
1:1 Poly (styrene-co-ethylmethacrylate) (PSEM) was prepared by bulk polymerization and fractionated using methylethyl ketone/petroleum ether system. IR and NMR analyses of the copolymer substantiated the composition kinetically expected. As the composition heterogeneity of the compolymer was narrow, the characterization of the copolymer was effected in a single solvent by light scattering as well as viscosity measurements at 35° C. The molecular weight dependence of [η], the limiting viscosity number;\(\left( {\bar r^2 } \right)w^{_2^1 } \), therms end to end distance and A2 the second virial coefficient were established. The solvent ethylacetate was found to be thermodynamically more ideal for PSEM, than for polyethylmethacrylate. In an attempt to evaluate K, the Flory’s constant, application of various methods appeared to give almost similar values. In order to explain the low value ofΦ, the Flory’s universal parameter, rough estimates of\(\left( {\bar r_0 ^2 } \right)^{_2^1 } \), the unperturbedrms end to end distance;b, the statistical chain element;q, the persistence length and\({{\bar r_0 ^2 } \mathord{\left/ {\vphantom {{\bar r_0 ^2 } {l\bar r_{\max .} }}} \right. \kern-\nulldelimiterspace} {l\bar r_{\max .} }}\), the semiflexibility parameter were also made.
Similar content being viewed by others
References
Stockmayer, W. H., Moore, L. D., Jr., Fixman, M. and Epstein, B. N.J. Polymer Sci., 1955,16, 517.
Bushuk, W. and Benoit, H.Can. J. Chem., 1958,36, 1616.
Leng, M. and Benoit, H.J. Polymer Sci., 1962,57, 263.
Sonja Krause..J. Phys. Chem., 1961,65, 1618.
—————.. Ibid., 1964,68, 1948.
Kotera, A., Saito, T., Watanabe, Y. and Ohama, M...Makromol Chem., 1965,87, 165.
Young, J...J. Polymer Sci., 1961,54, 411.
Brice, B. A., Halwar, M. and Speiser, R.J. Opt. Soc. Amer., 1950,40, 768.
—— and Speiser, R... Ibid., 1946,36, 363.
Zimm, B. H...J. Chem. Phys., 1948,16, 1093, 1099.
Cleland, R. L...J. Polymer Sci., 1953,27, 249.
Alfrey, T., Bohrer, J. and Mark, H.Copolymerisation, High Polymer Series, Interscience, N.Y. 1952, p. 10.
Bovey, F. A., Tiers, G. V. D. and Fillipovich, G.J. Polymer Sci., 1959,38, 73.
Ito, K. and Yamashita, Y. Ibid., 1965,B 3, 625.
Karunakaran, K. and Santappa, M.Makro. Chem., 1968,111, 20.
Flory, P. J. and Fox, T. G., Jr.J. Amer. Chem. Soc., 1951,73, 1904.
Kurata, M. and Stockmayer, W. H.Fortschr. Hochpolym. Forsche, 1963,3, 196.
Stockmayer, W. H. and Fixman, M.J. Polymer Sci., 1963,C 1, 137.
Chinai, S. N., Scherer, P. C., Bondurant, C. W. and Levi, D. W. Ibid., 1956,22, 527.
Trementozzi, Q. A... Ibid., 1959,36, 113.
Jennings, B. R. and Jerrard, H. G. Ibid., 1964,A 2, 4517.
Flory, P. J...Proc. Roy. Soc., 1956,234 A, 60.
Kratky and Porod, G. ..Proc. Int. Coll. Makromol Amsterdam, 1949.
Porod, G...Monatsch, Chem., 1949,80, 251.
Benoit, H. and Doty, P...J. Phys. Chem., 1953,57, 958.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Karunakaran, K., Santappa, M. Vinyl polymerization. Proc. Indian Acad. Sci. 67, 175–183 (1968). https://doi.org/10.1007/BF03049935
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF03049935