Abstract
Phenolic resin-layered silicate nanocomposites were prepared from solid-type resol and organo-bentonite (MMT) modified with oleylbis (2-hydroxyethyl) methylammonium by hot-roll kneading. At first, the conditions of hot-roll kneading were studied in order to prepare the molding compound which contained resol intercalated into MMT without gelation of resol. As a result, the molding compound was prepared by hot-roll kneading at 90˚C for 15min. Secondly, the curing behavior of the molding compounds was studied. At the initial stage, the melt viscosity of the molding compounds was lowered, and that of the molding compound containing no MMT was slightly lower than others and that of the molding compound containing MMT (5phr) was slightly higher than others. The variation of the melt viscosity of molding compound containing MMT (3phr) was almost same as that containing MMT (4phr). Next, the structure of the composites was investigated by XRD and TEM. It was found that solid-type resol could insert between the layers of MMT and phenolic resin/organo-bentonite nanocomposite could be produced, though there existed a small amount of aggregation of MMT with about 1μm diameter. The properties of these nanocomposites were investigated. It was found that phenolic resin/MMT (3 ～ 4phr) nanocomposites had the best mechanical strength and heat resistance, because of the insertion of phenolic resin between the layers of MMT.
