Preparation and performance of polyurethane elastomer for tram track rail ditch
The polyurethane elastomer was prepared with polyether polyol 330N,3,3'-dichloro-4,4'-diaminodiphenyl-methane,diphenylmethane diisocyanate and wear-resistant agents as the main raw materials.The effects of polyether poly-ols and wear-resistant agents on the properties of polyurethane elastomer were investigated by mechanical property,wear resistance and aging resistance tests,dynamic mechanical analysis and thermal analysis.The results showed that the polyurethane elastomer prepared by PTMEG-2000 had higher tensile strength,higher hardness,excellent dynamic me-chanical properties,and lower Akron wear compared with the polyurethane prepared by polyether polyol PPG-2000.The Akron wear of the elastomer using wear-resistant agent CUBD-NM01 was lower than that of molybdenum disulfide,and the Akron wear of the elastomer decreased with the increase of wear-resistant agent CUBD-NM01 dosage.The thermal decompo-sition temperature of the polyurethane elastomer was 220 ℃.Its performance indicators meet the design requirements and can be used for filling and sealing the rail ditch for tram truck.
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