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STUDIES ON STRUCTURE OF UREA FORMALDEHYDE RESINS USED FOR PARTICLEBOARDS

Caf Nanjing

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Abstract

The structure of urea formaldehyde resins in various stages of production with new technology was analysed by means of 13C NMR. The results from analysis showed that the structure of urea formaldehyde resins was affected by F/U mole ratio,pH value ,reaction time and temperature. The relationship between main groups in the UF resin, such as free formaldehyde, urea and its derivatives, methylene, methylene ether were investigated. The optimal content of each group in the urea formaldehyde resins used for particleboards with low formaldehyde emission and better mechanical properties was proposed.

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What this paper is about

The structure of urea formaldehyde resins in various stages of production with new technology was analysed by means of 13C NMR. The results from analysis showed that the structure of urea formaldehyde resins was affected by F/U mole ratio,pH value ,reaction time and temperature. The relationship between main groups in the UF resin, such as free formaldehyde, urea and its derivatives, methylene, methylene ether were investigated. The optimal content of each group in the urea formaldehyde resins used for particleboards with low formaldehyde emission and better mechanical properties was proposed.

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Available abstract

The structure of urea formaldehyde resins in various stages of production with new technology was analysed by means of 13C NMR. The results from analysis showed that the structure of urea formaldehyde resins was affected by F/U mole ratio,pH value ,reaction time and temperature. The relationship between main groups in the UF resin, such as free formaldehyde, urea and its derivatives, methylene, methylene ether were investigated. The optimal content of each group in the urea formaldehyde resins used for particleboards with low formaldehyde emission and better mechanical properties was proposed.

Key concepts: Formaldehyde, Urea-formaldehyde, Chemistry, Methylene, Urea, Ether, Organic chemistry, Nuclear chemistry

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STUDIES ON STRUCTURE OF UREA FORMALDEHYDE RESINS USED FOR PARTICLEBOARDS — Research Paper | ScholarLens