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%.
出处
《化学推进剂与高分子材料》
CAS
2011年第3期69-72,共4页
Chemical Propellants & Polymeric Materials
关键词
高铁桥梁
聚氨酯
伸缩缝
high-speed railway bridge
polyurethane
expansion joint
