Preparation and Properties of Blending Modified Phenolic Resin

The PF modified HPM (HPM-PF) was prepared by the reaction of N-(4-hydroxyphenyl) maleimide (HPM) which substituting part of phenol and formaldehyde.The HPM-PF and the nitrile rubber-modified PF (NBR-PF) were blended to obtain a novel blending modified phenolic resin (HPM-NBR-PF).The structure of the blending modified phenolic resin were characterized by using infrared spectroscopy and differential scanning calorimetry analysis(DSC),and the heat resistance,mechanical properties and abrasion resistance were also carried out.The results show that HPM was chemically introduced into the main chain of PF.Hardness and impact strength of HPM-NBR-PF significantly increased compared to those of ordinary PF.The heat resistance showed the best when the mass fraction of N-(4-hydroxyphenyl) maleimide (HPM) was 6%,of which the temperature of the thermal mass loss of 10% was 462 ℃ and the final decomposition temperature was 610 ℃;The wear resistance of HPM-NBR-PF diamond resin segment was better than ordinary PF diamond resin segment,the abrasion loss of the former was 0.18 g,the latter was 0.26 g.