高速铁路桥梁用低模量聚氨酯伸缩缝  

Expansion Joint of Low Modulus Polyurethane in High-Speed Railway Bridge

作　　者：张梅[1] 庞金录[2] 杨光付[3] 姜志国[1] 

机构地区：[1]北京化工大学材料科学与工程学院 [2]北京北方车辆集团有限公司 [3]中国人民解放军91872部队

出　　处：《化学推进剂与高分子材料》2011年第3期69-72,共4页Chemical Propellants & Polymeric Materials

摘　　要：以组合聚醚多元醇和甲苯二异氰酸酯(TDI)制备的预聚体,与混合扩链剂,制备了一种双组分低模量高伸长率聚氨酯伸缩缝。经过试验可知n(NCO)∶n(OH)为1.05∶1,硬段质量分数为1 4%￣1 6%时,制备的伸缩缝材料,达到了所需聚氨酯伸缩缝的各项要求。The prepolymer was prepared by combined polyether polyols and toluene diisocyanate（TDI）.A polyurethane expansion joint with two components,low modulus and high elongation was synthesized by above prepolymer and a blend of chain extenders.It is found by the experiment that the expansion joint material can meet the various requirements of required polyurethane expansion joint when n（NCO）：n（OH）=1.05：1,mass fraction of the hard segment is 14%~16%.

关 键 词：高铁桥梁 聚氨酯 伸缩缝 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]