共混改性酚醛树脂的制备与性能

Preparation and Properties of Blending Modified Phenolic Resin

用N-(4-羟基苯基)马来酰亚胺(HPM)取代一部分苯酚与甲醛反应得到HPM改性的酚醛树脂(HPM-PF),然后将其与丁腈橡胶改性的酚醛树脂(NBR-PF)进行共混,得到了一种新型的共混改性酚醛树脂(HPM-NBR-PF);采用红外光谱仪、差示扫描量热分析仪对HPM-NBR-PF的结构进行了表征,并对其耐热性、力学性能和金刚石树脂节块的耐磨性能进行了研究。结果表明:HPM通过化学键引入至PF的主链中;HPM-NBR-PF的硬度和冲击强度均较普通PF的有显著提高,其中,6%HPM-NBR-PF的耐热性最好,其热质量损失10%时的温度为462℃,最终分解温度为610℃;6%HPM-NBR-PF金刚石树脂节块的耐磨性优于普通PF金刚石树脂节块的,前者的磨损量为0.18g,后者的为0.26g。

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 rubbermodified 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.