K. Lenghaus et al., Model studies of the curing of resole phenol-formaldehyde resins Part 1. The behaviour of ortho quinone methide in a curing resin, POLYMER, 41(6), 2000, pp. 1973-1979
Model compounds have been used to investigate the curing behaviour of resol
e phenol formaldehyde resins. These models have shown that an ortho quinone
methide intermediate is very site specific, preferring to react at a free
ortho site of phenols. This study also shows that phenoxy type bridges can
be formed by ether exchange between a phenolic OH and an ether bridge. Thes
e results help explain some of the structures observed in cured resins. (C)
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