以B4C陶瓷为改性粒子对酚醛树脂进行改性,研究其高温结构演变.结果表明,随着热处理温度的提高,B4C改性粒子在树脂基体中的分布趋向于均匀化.在450℃热处理后,B4C粒子开始呈现出氧化迹象;650℃以上高温,B4C则大量地氧化为B2O3.通过B4C的改性反应,可有效地将CO等挥发份转化为炭而保留在树脂中,从而有利于提高酚醛树脂高温热处理后的结构完整性.
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