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Research on the Primary Processes of Radiation-Initiated Polymerization; Recherches sur les processus primaires de polymerisation amorcee par rayonnements; Issledovaniya osnovnykh protsessov polimerizatsii pod vozdejstviem oblucheniya; Estudios sobre los procesos primarios en la polimerizacion radioinducida

Conference:

Abstract

Excitation energy transfer in benzene solutions of monomers, polymers and copolymers has been studied by observations on the quenching of terphenyl fluorescence produced by gamma radiation. The ease of energy transfer from benzene to various monomers is conjugated monomers > unconjugated > monomers > corresponding saturated compounds. Quenching experiments were also carried out using polymer solutions in benzene. The order of efficiencies was crepe rubber > polystyrene > polyvinyl acetate > acrylic polymers. The results obtained for quenching by a styrene-methyl methacrylate copolymer indicated that the specific quenching efficiency of the styrene units in the copolymer was less than in the homopolymer. The gamma ray initiated polymerisation of styrene in methylene dichloride solutions at low temperature was studied. The results obtained for the dependence of polymerisation rate on intensity are consistent with an ionic mechanism. The composition of the copolymer obtained with methyl methacrylate also supports this view. (author) [French] Les auteurs ont etudie la transmission de l'energie d'excitation dans les solutions de benzene du fait de la presence de monomeres, polymeres et copolymeres, en etudiant l'extinction de la fluorescence du terphenyle induite par rayons gamma. On peut classer les divers monomeres en trois categories selon l'ordre de facilite avec  More>>
Publication Date:
Jul 15, 1960
Product Type:
Conference
Resource Relation:
Conference: Conference on the application of large radiation sources in industry, Warsaw (Poland), 8-12 Sep 1959; Other Information: 8 figs., 4 tabs., 19 refs.; Related Information: In: Large radiation sources in industry. Proceedings of a conference on the application of large radiation sources in industry. V. I| 492 p.
Subject:
38 RADIATION CHEMISTRY, RADIOCHEMISTRY AND NUCLEAR CHEMISTRY; BENZENE; COPOLYMERS; EFFICIENCY; ENERGY TRANSFER; EXCITATION; FLUORESCENCE; GAMMA RADIATION; METHACRYLIC ACID ESTERS; MONOMERS; POLYACRYLATES; POLYMERIZATION; POLYSTYRENE; POLYVINYL ACETATE; QUENCHING; RUBBERS; SOLUTIONS; STYRENE
OSTI ID:
22025822
Research Organizations:
International Atomic Energy Agency, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA12R0232113115
Submitting Site:
INIS
Size:
page(s) 391-405
Announcement Date:
Jan 16, 2013

Conference:

Citation Formats

Okamura, S, Manabe, T, Higashimura, T, Oishi, Y, and Futami, S. Research on the Primary Processes of Radiation-Initiated Polymerization; Recherches sur les processus primaires de polymerisation amorcee par rayonnements; Issledovaniya osnovnykh protsessov polimerizatsii pod vozdejstviem oblucheniya; Estudios sobre los procesos primarios en la polimerizacion radioinducida. IAEA: N. p., 1960. Web.
Okamura, S, Manabe, T, Higashimura, T, Oishi, Y, & Futami, S. Research on the Primary Processes of Radiation-Initiated Polymerization; Recherches sur les processus primaires de polymerisation amorcee par rayonnements; Issledovaniya osnovnykh protsessov polimerizatsii pod vozdejstviem oblucheniya; Estudios sobre los procesos primarios en la polimerizacion radioinducida. IAEA.
Okamura, S, Manabe, T, Higashimura, T, Oishi, Y, and Futami, S. 1960. "Research on the Primary Processes of Radiation-Initiated Polymerization; Recherches sur les processus primaires de polymerisation amorcee par rayonnements; Issledovaniya osnovnykh protsessov polimerizatsii pod vozdejstviem oblucheniya; Estudios sobre los procesos primarios en la polimerizacion radioinducida." IAEA.
@misc{etde_22025822,
title = {Research on the Primary Processes of Radiation-Initiated Polymerization; Recherches sur les processus primaires de polymerisation amorcee par rayonnements; Issledovaniya osnovnykh protsessov polimerizatsii pod vozdejstviem oblucheniya; Estudios sobre los procesos primarios en la polimerizacion radioinducida}
author = {Okamura, S, Manabe, T, Higashimura, T, Oishi, Y, and Futami, S}
abstractNote = {Excitation energy transfer in benzene solutions of monomers, polymers and copolymers has been studied by observations on the quenching of terphenyl fluorescence produced by gamma radiation. The ease of energy transfer from benzene to various monomers is conjugated monomers > unconjugated > monomers > corresponding saturated compounds. Quenching experiments were also carried out using polymer solutions in benzene. The order of efficiencies was crepe rubber > polystyrene > polyvinyl acetate > acrylic polymers. The results obtained for quenching by a styrene-methyl methacrylate copolymer indicated that the specific quenching efficiency of the styrene units in the copolymer was less than in the homopolymer. The gamma ray initiated polymerisation of styrene in methylene dichloride solutions at low temperature was studied. The results obtained for the dependence of polymerisation rate on intensity are consistent with an ionic mechanism. The composition of the copolymer obtained with methyl methacrylate also supports this view. (author) [French] Les auteurs ont etudie la transmission de l'energie d'excitation dans les solutions de benzene du fait de la presence de monomeres, polymeres et copolymeres, en etudiant l'extinction de la fluorescence du terphenyle induite par rayons gamma. On peut classer les divers monomeres en trois categories selon l'ordre de facilite avec laquelle l'energie du benzene leur est transmise : monomeres conjugues, monomeres non conjugues, composes satures correspondants. Les auteurs ont egalement fait des experiences sur des polymeres dans une solution de benzene. L'efficacite va en decroissant dans l'ordre suivant: caoutchouc naturel, polystyrolene, acetate de polyvinyle, polymere acrylique. Les resultats obtenus pour le copolymere styrolene-methacrylate de methyle montrent que l'efficacite d'extinction du styrolene est plus faible dans le cas des copolymeres que dans le cas des homopolymeres. Les auteurs ont etudie la polymerisation du styrolene amorcee au moyen de rayons gamma dans une solution de dichlorure de methylene a basse temperature. Le rapport direct constate entre la vitesse de polymerisation et l'intensite repond a une caracteristique du mecanisme de polymerisation ionique. La composition du copolymere obtenu avec le methacrylate de methyle vient egalement a l'appui de cette hypothese. (author) [Spanish] Observando la extincion de la luminiscencia del terienilo inducida por los rayos gamma, se ha estudiado el proceso de transmision de la energia de excitacion en soluciones bencenicas de monomeros, polimeros y copolimeros. La facilidad con que la energia se transmite del benceno a los diversos monomeros responde al siguiente orden decreciente: monomeros conjugados > monomeros no conjugados > compuestos saturados correspondientes. Tambien se realizaron experimentos sobre la extincion de la luminiscencia utilizando polimeros disueltos en benceno. El poder de extincion de los polimeros disminuye con arreglo al siguiente orden: caucho natural > poliestireno > acetato de polivinilo > polimeros acrilicos. Los resultados obtenidos al emplear un copolimero de estireno-metacrilato de metilo indicaron que el poder extintor especifico de los grupos estireno del copolimero es inferior al observado en el caso del homopolimero. La polimerizacion inducida por rayos gamma del estireno disuelto en diclorometileno tambien se estudio a bajas temperaturas. Los resultados obtenidos en lo que se refiere a la relacion existente entre la velocidad de polimerizacion y la intensidad de irradiacion parecen indicar que el mecanismo es de naturaleza ionica. La composicion del copolimero obtenido a partir de metacrilato de metilo tambien corrobora esta opinion. (author) [Russian] Peredacha ehnergii vozbuzhdeniya v benzol'nykh rastvorakh monomerov, polimerov i sopolimerov izuchayutsya putem nablyudeniya kvenchinga trifinil'noj fluorestsentsii, poluchaemogo v rezul'tate gamma-oblucheniya. Sposobnost' peredachi ehnergii ot benzola razlichnym monomeram sleduyushchaya : sopryazhennye monomery > nesopryazhennye monomery > sootvetstvuyushchie predel'nye soedineniya. EHksperimenty s kvenchingom provodyatsya takzhe s ispol'zovaniem rastvorov polimerov v benzole. Poryadok otdachi sleduyushchij : natural'nyj kauchuk > polistirol > polivinilovaya sol' > akrilovye polimery. Rezul'taty, poluchennye dlya kvenchinga s pomoshch'yu sopolimera stirol-metil-metakrilata, ukazyvayut na to, chto osobaya sposobnost' k kvenchingu soedinenij stirola v sopolimere proyavlyaetsya v men'shej stepeni, chem v gomopolimere . Issledovalas' polimerizatsiya stirola v rastvorakh dvukhloristogo metilena pri nizkoj temperature. Poluchennye rezul'taty otnositel'no zavisimosti skorosti polimerizatsii ot intensivnosti soglasuyutsya s ionnym mekhanizmom. Sostav sopolimerov, poluchennykh s metil-metakrilatom, takzhe podtverzhdaet ehtot vyvod. (author)}
place = {IAEA}
year = {1960}
month = {Jul}
}