自粘聚合物改性沥青防水卷材老化性能研究OA

In this study,SBS modified asphalt-adhesive rolls were used as the research object,and the changes in me-chanical properties,self-adhesion,microstructure,and chemical composition of the rolls during the aging process systematically analyzed through thermal oxygen aging,ultraviolet aging,and wet-heat aging tests.The result showed that after thermal oxygen aging,the tensile strength and adhesion retention of rolls de-creased by about 30%;after ultraviolet aging,the surface asphalt appeared to be pulverized,and the peel strength decreased by about 35%;wet-aging significantly accelerated the phase separation of asphalt and SBS,and the elongation at break decreased by about 40%.Based on the FTIR and SEM analysis,composite modification scheme of"antioxidant 1010 hindered amine light stabilizer"was proposed,and after optimiza-tion,the thermal oxygen aging tensile strength rate and the peel strength retention rate after ultraviolet aging of the rolls reached about 80%.