聚氨酯组合料及装配式聚氨酯固化道床的制备  

Preparation of Polyurethane Composite Material and Assembled Polyurethane Curing Ballast Bed

作　　者：张彬 刘志 郄录朝 贾彤珺 张勇 肖俊恒 ZHANG Bin;LIU Zhi;QIE Luchao;JIA Tongjun;ZHANG Yong;XIAO Junheng(Beijing Tieke Shougang Rail-Tech Co.Ltd.,Beijing 102206,China;Railway Engineering Research Institute,CARS,Beijing 100081,China)

机构地区：[1]北京铁科首钢轨道技术股份有限公司,北京102206 [2]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2023年第11期1-5,共5页Railway Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划(P2022G013);国家能源投资集团有限责任公司技术开发项目(GJNY-19-91)。

摘　　要：以聚醚多元醇、乙二醇和二苯基甲烷二异氰酸酯为主要原料,制备出聚氨酯组合料。以多苯基多亚甲基多异氰酸酯、N‐正丁基‐3‐氨丙基三甲氧基硅烷和聚酯树脂为主要原料制备出界面黏结剂。以聚氨酯组合料、界面黏结剂、混凝土轨枕、洁净道砟等工程材料,使用自行设计的装配式聚氨酯固化道床试制线制备出装配式聚氨酯固化道床产品。通过聚氨酯组合料热分析、装配式聚氨酯固化道床黏结强度和静刚度测试等试验研究聚氨酯组合料和装配式聚氨酯固化道床性能。结果表明:聚氨酯组合料制备的聚氨酯泡沫玻璃化转变温度为-62.47℃,热分解温度为200℃,自由泡泡孔直径在200μm左右;涂抹界面黏结剂后,混凝土轨枕与聚氨酯泡沫的黏结强度由0.12 MPa提升至0.28 MPa,装配式聚氨酯固化道床产品静刚度为68.9 kN/mm。This study involved the synthesis of polyurethane composite material using polyether polyol,ethylene glycol,and diphenylmethane diisocyanate as primary ingredients.An interface adhesive was crafted from polyisocyanate,N-butyl-3-aminopropyltrimethoxysilane,and polyester resin.Employing a custom-designed assembled polyurethane curing ballast bed,incorporating polyurethane composite material,interface adhesive,concrete sleepers,and clean ballast,resulted in the production of an assembled polyurethane curing ballast bed product.Performance evaluation,including thermal analysis of the polyurethane composite material and tests on bonding strength and static stiffness of the assembled polyurethane curing ballast bed,revealed noteworthy findings.The glass transition temperature of the polyurethane foam created from the composite material was -62.47℃,with a decomposition temperature of 200℃ and free foam bubble diameters around 200μm.Application of the interface adhesive significantly increased the bonding strength between concrete sleepers and polyurethane foam from 0.12 MPa to 0.28 MPa,while the static stiffness of the assembled polyurethane curing ballast bed product measured 68.9 kN/mm.

关 键 词：工程材料 装配式聚氨酯固化道床 试验研究 聚氨酯组合料 界面黏结剂 

分 类 号：U213.7[交通运输工程—道路与铁道工程] TU528[建筑科学—建筑技术科学]