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OALib Journal期刊
ISSN: 2333-9721
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基于苯甲醛交联剂的煤直接液化残渣改性石油沥青
, PP. 1052-1060
Keywords: 沥青,液化残渣,苯甲醛,聚合,热解
Abstract:
？以苯甲醛为交联剂,采用煤直接液化残渣的四氢呋喃萃取物(thfs)对石油沥青进行了改性。考察了thfs、交联剂的掺杂量以及掺混温度对改性沥青性能的影响。研究表明,当thfs的掺杂量为4%,掺混温度为170℃时改性效果最佳,而且苯甲醛作为交联剂加入可使沥青改性效果更佳。利用热重-傅里叶红外光谱联用仪(tg-ftir)、傅里叶变换红外光谱仪(ft-ir)和荧光显微镜对改性沥青进行了表征,结果表明,添加了苯甲醛的改性沥青的失重残余率较其他沥青略有提高;苯甲醛交联的改性沥青在热解过程中释放的ch4含量减少且释放温度有所提高;改性沥青在2924cm-1和2854cm-1处的脂肪族-ch2-的伸缩振动和表征苯环位取代872、810和746cm-1处吸收峰的透射率均有较大幅度的提高,并在1060cm-1处出现c-o-c伸缩振动峰,以及荧光显微镜图像中出现新的改性粒子,表明交联剂的添加使thfs和基质沥青发生了缩合反应。
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