Critical parameters for electron beam curing of cationic epoxies and property comparison of electron beam cured cationic epoxies versus thermal cured resins and composites

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Electron beam curing of composites is a nonthermal, nonautoclave curing process offering the following advantages compared to conventional thermal curing: substantially reduced manufacturing costs and curing times; improvements in part quality and performance; reduced environmental and health concerns; and improvements in material handling. In 1994 a Cooperative Research and Development Agreement (CRADA), sponsored by the Department of Energy Defense Programs and 10 industrial partners, was established to advance electron beam curing of composites. The CRADA has successfully developed hundreds of new toughened and untoughened resins, offering unlimited formulation and processing flexibility. Several patent applications have been filed for this work. ... continued below

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12 p.

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Janke, C.J.; Norris, R.E.; Yarborough, K.; Havens, S.J. & Lopata, V.J. January 16, 1997.

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Electron beam curing of composites is a nonthermal, nonautoclave curing process offering the following advantages compared to conventional thermal curing: substantially reduced manufacturing costs and curing times; improvements in part quality and performance; reduced environmental and health concerns; and improvements in material handling. In 1994 a Cooperative Research and Development Agreement (CRADA), sponsored by the Department of Energy Defense Programs and 10 industrial partners, was established to advance electron beam curing of composites. The CRADA has successfully developed hundreds of new toughened and untoughened resins, offering unlimited formulation and processing flexibility. Several patent applications have been filed for this work. Composites made from these easily processable, low shrinkage material match the performance of thermal cured composites and exhibit: low void contents comparable to autoclave cured composites (less than 1%); superb low water absorption values in the same range as cyanate esters (less than 1%); glass transition temperatures rivaling those of polyimides (greater than 390 C); mechanical properties comparable to high performance, autoclave cured composites; and excellent property retention after cryogenic and thermal cycling. These materials have been used to manufacture many composite parts using various fabrication processes including hand lay-up, tow placement, filament winding, resin transfer molding and vacuum assisted resin transfer molding.

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12 p.

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INIS; OSTI as DE97003336

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  • Spring meeting of the Society for the Advancement of Material and Process Engineering, Anaheim, CA (United States), 5-8 May 1997

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  • Other: DE97003336
  • Report No.: CONF-970581--1
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 463645
  • Archival Resource Key: ark:/67531/metadc682075

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  • January 16, 1997

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  • July 25, 2015, 2:21 a.m.

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  • Jan. 19, 2016, 12:11 p.m.

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Janke, C.J.; Norris, R.E.; Yarborough, K.; Havens, S.J. & Lopata, V.J. Critical parameters for electron beam curing of cationic epoxies and property comparison of electron beam cured cationic epoxies versus thermal cured resins and composites, article, January 16, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc682075/: accessed June 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.