2017 Volume 38 Issue 4 Pages 184-191
We investigated a high molecular weight cresol-novolac-resin with toughness. With a conventional synthetic method of the cresol-novolac-resin, we found that it was able to prepare the high molecular weight resin more than 100000, by examining the various combinations of formaldehyde, cross-linker and catalyst. This resin showed the good solubility ins an organic solvent, and the high tensile strength as a tough film property. Furthermore, the cured material with the epoxy resin showed a high coefficient of elasticity and proof stress.