杜仲胶与SBS改性沥青共混试验研究

SBS因存在与沥青相容性的问题,并不能对所有沥青起到很好的改性效果.而构建SBS与沥青反应渠道,增加反应界面,从而改善与沥青相容性,是提高SBS改性沥青性能的有效手段.天然高分子材料杜仲胶具有与SBS相类似的橡塑二重性,与SBS能很好地相容.同时采用溶剂接枝的方法,在杜仲胶上接枝能与沥青氮基反应的官能团马来酸酐,从而形成了符合SBS增容剂要求的接枝杜仲胶.通过对两种品质不同的沥青进行高低温和流变性能试验,进一步验证了接枝杜仲胶是一种性能良好的SBS改性沥青增容剂.

Test and Research on Effect of Eucommia Ulmoides Gum Blending with SBS Modified Asphalt

Because of the existent problems of compatibility with asphalt,the SBS can't have good effect of modification to all asphalt.However,by setting up the channels in which the SBS reacts with asphalt,increasing the reactive interface,thus improving the compatibility with asphalt,is a effect means to improve the SBS's function to modify asphalt.As natural macromolecule material,eucommia ulmoides gum has the duality of rubber and plastic like the SBS,and is compatible with the SBS well.Meanwhile,in the way of grafting with impregnant,eucommia ulmoides gum grafted with malay anhydride that can react with the asphalt nitrogen group,which forms the grafting eucommia ulmoides gum that meets the request of swelling agent of SBS.Carrying experiment of high-low temperature and rheology to two kinds of asphalt of different quality,it is further validated that the grafting eucommia ulmoides gum is a swelling agent in good performance to SBS modified asphalt.