Aging and Stabilization of Polymers - download pdf or read online

By Professor M. B. Neiman (auth.), Professor M. B. Neiman (eds.)

ISBN-10: 146158549X

ISBN-13: 9781461585497

ISBN-10: 1461585511

ISBN-13: 9781461585510

The desire for a large improvement of the construction of polymer ma­ terials has turn into glaring. these kind of fabrics are topic to numerous varieties of getting older (destruction); therefore, stabilizers which allow the stor­ age, reprocessing, and use of polymer fabrics with none appreci­ capable switch of their houses has to be brought into them. in recent times, this challenge of stabilizing polymers has attracted the eye of many scientists and technologists, either within the USSR and in another country. The medical foundation of the international experiences should be present in a couple of theo­ retical premises, yet mainly the speculation of chain reactions with un­ branched chains. within the Soviet Union, the recommendations of Academician N. N. Semenov on chain reactions with degenerate branches became the start line of theoretical stories of the stabilization and destruction of polymers. Soviet scientists have constructed a conception of serious concentrations of antioxidants and feature proven that the procedures of stabilization have a really advanced chemical personality. the character of the polymers them­ selves enormously impacts those methods and for this reason, diversified stabil­ izers are required for polymers of alternative constructions. moreover, it's been proven that the antioxidants used up to now can't simply reason chain termination, yet may also start up oxidation and provides upward push to de­ generate branches.

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R. Loy, J. Chem. Phys. 23:2461, 1955. 11. M. L. Khidekel', A. L. Buchac henko, L. V. Gorbunova, G. A. Razuvaev, and M. B. Neiman, Doklady Akad. Nauk SSSR 140:5, 1961. Stable Radicals of Inhibitors 55 12. A. L. Buchachenko, Optika i Spektroskopiya 13:6, 795, 1962. 13. O. L. Harle and J. R. Thomas, J. Am. Chern. Soc. 79:2973, 1957. 14. A. L. Buchachenko, M. S. Khloplyankina, and M. B. Neiman, Doklady Akad. Nauk SSSR 143:146, 1962. 15. A. L. Buchachenko, Stable Radicals, Moscow, Academy of Sciences USSR Press, 1963.

Miller, Yu. A. Shlyapnikov, and E. S. Torsueva, Doklady Akad. Nauk SSSR 136:647, 1961. 60. N. M. Emanuel', A. B. Gagarina, and Z. K. Maizus, Doklady Akad. Nauk SSSR 135:354, 1960. 61. D. Ryshavy, Vysokomolekulyarnye Soedineniya 3:464, 1961. 62. V. B. Miller, M. B. Neiman, V. S. Pudov, and L. 1. Lafer, Vysokomolekulyarnye Soedineniya 1:1696, 1959. 40 Chapter I 63. R. Goglev and M. B. Neiman, Vysokomolekulyarnye Soedineniya 5:1050, 1963. 64. G. 1. Likhtenshtein, M. B. Neiman, and N. Sysoeva, Tr. po Khim.

Consumption of di-tertbutyl-p-cresylmethane in the oxidation of polypropylene (1) and in the presence of didecyl sulfide (2). T = 200·C; P02 = 300 mm Hg. J 100 o CliO-51 75 Z5 JO 50 25 75 0, % 100, %ArOH Fig. 25. Dependence of the induction period in the oxidation of polypropylene on the molecular fraction of didecyl sulfide and 2,6di -tert -octylcresol. 2 mole/kg; T = 200·C; POz = 300 mm Hg. 25 0 (1,75 I Pyrocatecholphosphite and ionol Fig. 26. Induction period of the thermooxidative destruction of polypropylene stabilized by mixtures of SAO-6 and pyrocatechol phosphite with ionol.

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