高強度ポリマーセメント複合材料における多価フェノールの効果

抄録

Phenol resin-alumina cement composite (PRAC composite) with flexural strength as high as 200 MPa has been developed by Hasegawa et al. from the composition of phenolic resin (resol resin), alcohol soluble polyamide, glycerol and alumina cement. In comparing with MDF (macro-defect-free) cement, this newly developed composite has higher flexural strength and resistivity to water and heat. From mechanism study, we indicated the existence of interaction in the interface area between hydroxyl group in phenol resin and alumina cement.
In this paper, the effect on flexural strength of diphenolic and triphenolic compounds with palafolm added in PRAC composite was studied. Addition of a slight amount of diphenolic compounds, such as resorcinol, or triphenolic compounds, such as pyrogallol or phloroglucinol, raised the flexural strength of the PRAC composite by approximately 33% in comparison with that without addition of di-and triphenolic compounds. From the results of model reaction of AC and pyrogallol or phloroglusinol, it was suggested that hydroxyl group and alumina cement play an important role to enhance the strength of the composite.