Abstract
The purpose of this study is to reduce the cure time and to lower the cure temperature of benzoxazine compounds. We investigated the curing behavior of bisphenol-A type novolac based benzoxazine with bisoxazoline (BisAN-a/1, 3-PBO) and the properties of the cured resin. As a result, the molten resin mixture from BisAN-a/1, 3-PBO showed good thermal stability and flowability below 120°C, as well as that from conventional bisphenol-A based benzoxazine and bisoxazoline (B-a/1, 3-PBO). However, above 160°C the curing reaction of BisAN-a/1, 3-PBO proceeded more rapidly than that of B-a/1, 3-PBO. It was found that the cure time of the molten resin mixture from BisAN-a/1, 3-PBO could be reduced and also the cure temperature could be lowered, compared with those from B-a/1, 3-PBO. The cured resin from BisAN-a/1, 3PBO had superior heat resistance and water resistance to that from B-a/1, 3-PBO because of higher crosslink density.
