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Preparation and properties of phenolated corn bran (CB)/phenol/formaldehyde cocondensed resin
Author(s) -
Lee SeungHwan,
Yoshioka Mariko,
Shiraishi Nobuo
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000923)77:13<2901::aid-app12>3.0.co;2-f
Subject(s) - formaldehyde , phenol , thermosetting polymer , chemistry , phenol formaldehyde resin , organic chemistry , polymer chemistry , materials science
Corn bran (CB) was liquefied in the presence of phenol at high temperature (200°C) under high pressure (>1 atm) and the obtained liquefied products were reacted with formaldehyde to get phenolated CB/phenol/formaldehyde resins with excellent yields. The properties of the cocondensed resins were examined and compared with the liquefied products before the cocondensation. Little difference was observed in thermofluidity before and after the cocondensation, whereas the thermosetting properties and the flexural properties of the molded products were enhanced. These properties were comparable with those of liquefied resins from corn starch (CS) and those of commercial novolak resin. Moreover, no significant differences were found in the properties of the liquefied products and the thermosetting resins therefrom after removal of the solid residue and neutralization salt. It became apparent that the condensation reactions between formaldehyde and the unreacted phenol in the liquefied products enhance the physical properties of the liquefied products from CB, making possible the total utilization of the liquefied products. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2901–2907, 2000