Sun Jian（Key Laboratory of Eco-chemical Engineering of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China）　 Wang Shengjun（Key Laboratory of Eco-chemical Engineering of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China）　 Hao Junsong（Key Laboratory of Eco-chemical Engineering of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China）　 Li Zaifeng（Key Laboratory of Eco-chemical Engineering of Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China）　

Abstract：Compared with general polymers, polyureathane-urea(PUU) elasto-mer shows more superior properties such as toughness, tear strength, flexibility, elongation, hydrolytic stability and good low temperature property, so it is widely used in coating, foam, textile, elastomers, medicine equipment, etc. However, these good mechanical properties can not be retained for a long time at high temperature, for this rea-son, its application at high temperature is restricted. To improve its thermal stability and mechanical properties, the adjacency crosslinked PUU with HTBN as soft segment was prepared in this study.