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Phenol/cresol‐formaldehyde resin characterization and contribution to product hardness
Author(s) -
Brauman S. K.,
MyersAcosta B. L.,
Lokensgard P. C.,
Steiner M. M.
Publication year - 1990
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760300502
Subject(s) - shore durometer , phenol , formaldehyde , materials science , phenol formaldehyde resin , cresol , size exclusion chromatography , molar mass distribution , gel permeation chromatography , polymer chemistry , composite material , organic chemistry , chemistry , polymer , enzyme
Lot‐to‐lot variations in a phenol/cresol‐formaldehyde resin were fully characterized. Resin property‐product hardness relationships were examined to elucidate the cause of variable hardness in product insulators and to establish acceptance criteria for the resin. A high methylol content (ϕCH 2 OH), determined by quantitative carbon‐13 nuclear magnetic resonance ( 13 C‐NMR), and a narrow molecular weight distribution ( MWD ), determined by size exclusion chromatography, were found necessary for resin to produce insulator meeting the minimum Shore D durometer specification of 40.