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生物沥青是相对于石油沥青的一种新型材料,由生物质快速热裂解制备生物油,继而制备而成。本文针对生物改性沥青稳定性较差及高低温性能较弱的缺点,通过可控-活性自由基聚合方法研发制备得到了数均分子量和分子链微观结构清晰的高分子改性剂,掺入生物沥青中改善其性能,并通过沥青3大常规指标试验进行了评价。改性后的生物沥青稳定性良好,具有较好的高温和低温性能。因此,可控-活性自由基聚合方法研发制备得到的高分子改性剂对生物沥青的改性效果优异。
Bio-asphalt is a new type of material relative to petroleum pitch. Bio-oil is prepared from biomass by rapid pyrolysis and then prepared. In order to overcome the shortcomings of poor stability and poor high and low temperature properties of biodiesel modified asphalt, a polymer modifier with a clear number-average molecular weight and a clear microstructure was obtained by controlled-living radical polymerization. Bio-asphalt to improve its performance, and through the asphalt three major indicators of conventional tests were evaluated. Modified biological bitumen stability is good, with good high temperature and low temperature performance. Therefore, the controllable - living free radical polymerization method developed polymer modified agent modified bitumen is excellent.