Synthesis of bisphenol a novolac epoxy r
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Ayman M. Atta; Nevin O. Shaker; Notaila E. Nasser
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Article
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2007
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John Wiley and Sons
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English
β 128 KB
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## Abstract Bisphenol A novolacs were synthesized in both melting and solution processes using __p__βformaldehyde and formalin solution in presence of oxalic acid catalyst, respectively. Hydrogen nuclear magnetic resonance, ^1^H NMR, investigations show a high methylene bridge contents in the novol