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摘要
利用邵氏A硬度与吸水率作为评价指标,优选出聚氨酯材料合成的最佳配方,在此配方下聚氨酯的邵氏A硬度达到75,吸水率为0.74%。利用FT-IR、SEM和TG对该材料进行微观表征,分析表明,在最佳配方条件下成功合成了聚氨酯粘结剂,其表面连续、平整性较好、固化反应完全,具有良好的热稳定性。综合评价断裂伸长率和拉伸强度发现填料(SiO2)的掺量应优选为40%。根据抗滑系数和湿轮磨耗实验确定聚氨酯薄层的胶石比范围为 0.25～0.67,在此范围内,聚氨酯耐磨层的抗滑系数和1h浸水磨耗损失均能满足规范要求。
Abstract
The best formula of polyurethane(PU) was optimized by using shore A hardness and water absorption as evaluation indexes.Under this condition,the shore A hardness of the PU reached 75 and the water absorption was 0.74%.The microstructure of the PU was characterized by FT-IR,SEM and TG.The results showed that the PU binder was successfully synthesized under the optimal formulation conditions,and its surface was continuous,with good flatness,complete curing reaction and good thermal stability.Comprehensive evaluation of elongation at break and tensile strength showed that the content of filler (SiO2) should be 40%.According to the anti-sliding coefficient and wet wheel wear test,the rubber aggregate ratio range of the PU thin layer was 0.25～0.67.Within this range,the anti-sliding coefficient and 1 h immersion wear loss of the PU wear resistant layer can meet the specification requirements.
关键词
聚氨酯涂料
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断裂生产率
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拉伸长度
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胶石比
Key words
polyurethane binder
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elongation at break
/
tensile strength
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rubber aggregate ratio
高性能聚氨酯涂料研制及其在耐磨层中的性能研究[J].
化工新型材料, 2022, 50(3): 260-264 DOI:10.19817/j.cnki.issn1006-3536.2022.03.053
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基金资助
广西重点研发计划(桂科AB19245019);南宁市科学技术研究与技术开发计划(20193129)
