The research involves using phenol – formaldehyde (Novolak) resin for making
Novolak compact with hexamethyltetraamine (HMTA ) in different ratio (15%) and
(20%) by weight , also this work involves preparing composite material by using
Novolak as a matrix , while flint was used as resin forcing material and making
composite compact with ratio of hardener (15%) and (20%) by weight. The research
was studied some of thermal properties such as thermal conductivity and thermal
Erosion resistance. The results show that the flint and increasing the (HMTA) leads to
increase thermal Erosion resistance and thermal conductivity . The results show that
the immersion in water leads to increase thermal conductivity .