Lignin is a natural product of phenolic nature. The effect of partial
replacement of phenol by lignin on the properties of novolak resins ha
s been studied. Also the change in properties of moulding powders base
d on conventional novolak on replacing wood flour filler by lignin has
been experimentally studied. Addition of lignin reduced the mechanica
l properties of the resin slightly but improved the electrical resista
nce. The reduction in mechanical properties was greater when lignin wa
s used as a filler. (C) 1998 Elsevier Science Ltd. All rights reserved
.