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P.109. H.Dorschner, M.Stephan, U.Wagenknecht, G.Heinrich (Leibniz- Institute of Polymer Re- search Dresden, Dresden, Germany)

ELECTRON ACCELERATOR ELV-2 IN POLYMER RESARCH- DIRECT COUPLING OF POLYMER EXTRUSION FOR MODIFICATION IN MOLTEN STATE

In 1972, an universal irradiation plant was built for research and service at the Leibnitz- Institute of Polymer Research Dresden. The accelerator - an industrial machine of the se- ries ELV - of Budker Institute of Nuclear Physics, Novosibirsk, Russia (BINP), operates in the energy range from 0.6 MeV to 1.5 MeV, the beam power maximum is 20 kW, and the beam current maximum is 25 mA. The treatment by electron irradiation is a special possibility to modify polymers. Several applications in plastics industry are well known, such as radiation induced degradation, crosslinking, grafting, curing, and polymerization. Very interesting chemical reactions are to be accepted by irradiation in molten state. High temperature, intensive macromolecular mobility and the absence of any crystallinity are some reasons for achieving unexpected structures, processing behaviour and property changes in treated thermoplastics and rubbers. For examples crosslinking of polyethylene is much more effective, and long chain branching of polypropylene can be generated. These modification effects are also achievable by a direct coupling of electron beam irra- diation and conventional polymer extrusion processing. For this unique processing tech- nique a special MOBILE RADIATION FACILITY (MOBRAD1/T) was designed, con- structed and manufactured in the IPF Dresden at which a lab-scale single screw extruder was adapted directly to the accelerator to realize a prompt irradiation of extruded polymer melt profiles before their solidification.

Helmut Wolfram Dorschner: dorsch@ipfdd.de

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    110. V.V.Tarnetsky, V.L.Auslender, K.N.Chernov, V.G.Cheskidov, B.L.Factorovich,

    • V.

      A.Gorbunov, I.V.Gornakov, M.V.Korobejnikov, G.I.Kuznetsov, A.N.Lukin,

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      G.Makarov, S.A.Maksimov, N.V.Matyash, G.N.Ostreiko, A.D.Panfilov,

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      V.Serdobintsev, A.V.Sidorov, M.A.Tiunov, V.O.Tkachenko, A.A.Tuvik (Budker Institute of Nuclear Physics, Novosibirsk, Russia) Status of Work on 5 MeV 300 kW Industrial Electron Accelerator Pro- totype

New industrial accelerator prototype with electron energy up to 5 MeV, average beam power of 300 kW, and duty factor of 14% is under construction at Budker INP. The work is supported by ISTC (Project #2550). At present, the design work is completed, the ac- celerating structure is under production at INP workshop. The paper presents a general description of the accelerator, its block diagram, and experimental results obtained at re- cent tests of the accelerating structure and injection unit.

Vladimir Vladimirovich Tarnetsky: sixfourteen@mail.ru

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