SBS的侧链羧基官能化改性及在改性沥青中应用  

Carboxyl Branched-Functionalized Modification of SBS and Application to Modified Asphalt

作　　者：李雪坤[1,2] 陈国顺[1] 杨维成[1] 段敏伟[1] 唐颂超[2] 曹亚东 麦永懿[1] 罗勇[1] Li Xuekun;Chen Guoshun;Yang Weicheng;Duan Minwei;Tang Songchao;Cao Yadong;Mai Yongyi;Luo Yong(State Key Laboratory of Polyolefins and Catalysis Materials, Shanghai Research Institute of Chemical Industry, Shanghai 200062, China;Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China;Shanghai Urban Construction Nichireki Special Asphalt Co. Ltd., Shanghai 200231, China)

机构地区：[1]上海化工研究院聚烯烃催化技术与高性能材料国家重点实验室,上海200062 [2]华东理工大学材料科学与工程学院上海市先进聚合物材料重点实验室,上海200237 [3]上海城建日沥特种沥青有限公司,上海200231

出　　处：《工程塑料应用》2017年第3期121-125,共5页Engineering Plastics Application

摘　　要：以3–巯基丙酸(MPA)为改性剂,偶氮二异丁腈(AIBN)为引发剂,利用巯基–烯加成反应对苯乙烯–丁二烯–苯乙烯三嵌段共聚物(SBS)进行侧链羧基官能化改性,得到改性产品SBS-g-COOH。利用傅立叶变换红外光谱(FTIR)和核磁共振(~1H–NMR)对不同接枝度的SBS-g-COOH进行结构表征,考察了反应温度、反应时间、改性剂用量对侧链羧基接枝度的影响。利用荧光显微镜考察了不同接枝度的SBS-g-COOH在沥青中的分散性,结果表明,SBS-g-COOH的接枝度随反应温度、反应时间和改性剂含量的增加而增加。低接枝度的SBS-g-COOH能明显改善其与沥青的相容性及热存储稳定性,接枝度在10%左右最佳。The low compatibility between asphalt and styrene-butadiene-styrene(SBS)was improved using carboxylfunctionalized SBS(SBS-g-COOH),which was prepared by thiol-ene addition reaction where3-mercaptopropionic acid(MPA),1,4-dioxane(DOA),2,2′-azbisisobutyrronitrile(AIBN)were used as modifying agent,solvent,and initiator respectively.Thecarboxyl group was mainly grafted to the vinyl double bonds of polybutadiene segments of SBS with characterization results of FTIRand1H NMR.The effects of reaction temperature,time and the amount of modifying agent were investigated,and the results showthat the grafting degree is increased with increasing reaction temperature,time,and content of modifying agent.The compatibilitybetween SBS-g-COOH with different grafting degree and asphalt is investigated using fluorescence microscopy.The compatibility,segregation degree,and storage stability of modified asphalt can be obviously improved at the grafting degree of SBS-g-COOH rangearound10%.

关 键 词：苯乙烯–丁二烯–苯乙烯三嵌段共聚物 巯基–烯加成反应 羧基官能化 改性沥青 

分 类 号：TQ334.9[化学工程—橡胶工业]