单组分聚氨酯密封胶基体具有较好的界面粘合作用

发布时间 : 2026-8-20 14:32:24
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

单组分聚氨酯密封胶基体具有较好的界面粘合作用

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

发布时间 : 2026-8-20 14:32:24
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(一)无论陶土尾矿粉的添加量是高或是低，其与单组分聚氨酯密封胶直接都呈现出较为模糊的界面，与单组分聚氨酯密封胶基体具有较好的界面粘合作用。

(二)陶土尾矿填充的硅烷改性单组分聚氨酯密封胶最大应力可达无填充硅烷改性单组分聚氨酯密封胶的10倍，断裂伸长率可达3倍。

(三)随着陶土尾矿粉用量增加，所得到的硅烷改性聚醚单组分聚氨酯密封胶的硬度增加可通过加人填料组分的份数判断出材料的硬度大小，用来指导实际工业化生产。为了研究不同表面处理工艺对单组分聚氛醋单组分聚氨酯密封胶与不锈钢粘接的影响规律，依据DVS1618 ((轨道机车车辆中的弹性厚膜粘接》标准对胶条试样进行剥离试验和GB /T 7124标准对胶粘接头剪切强度进行评估，利用SE M、水接触角测定仪、红外光谱分析仪、原子力显微镜(AFM)等试验方法表征了粘接表面的表面能、化学分子结构及断口显微形貌。结果表明，在不锈钢表面施加活化剂+溶剂型环氧底涂剂有效提高了单组分聚氛醋单组分聚氨酯密封胶对其的粘接效果，胶条剥离形貌从界面失效改善为内聚失效，粘接接头拉剪强度从1.0 MPa提升为1.7 MPa;此外，施加活化+底涂剂有效改善了胶条剥离试样的抗高温高湿搞合老化的剥离形貌，从完全界面失效转变为完全内聚失效。SEM断口分析表明，无底涂粘接接头断口形貌为界面平滑失效，施加活化剂+底涂剂后的粘接接头断口为胶私剂填充料撕裂的内聚破坏形貌。水接触角测试结果表明，施加活化剂+底涂剂后表面能增加不明显。红外光谱结果显示，施加活化剂+底涂剂表面存在大量环氧基团(C一0) ,这可能对增加被粘表面的活性具有重要影响。

单组分聚氨酚单组分聚氨酯密封胶因具有良好的耐磨性、耐水性、耐有机溶剂、粘接强度高等优点而被广泛应用于轨道车辆车体与车窗等的高强度粘接与密封。聚氨酚单组分聚氨酯密封胶本身极性较大，在面对本身极性较小的基材时往往会出现粘接不牢的现象，通常会预先在被粘基材表面涂刷底涂来改善基材表面活性，从而提升单组分聚氨酯密封胶与基材之间的粘接性能风。同时，选择底涂剂时也要求其自身具有良好的粘接性和耐候性，避免引入弱边界层，且与基材和胶豁剂均具有良好的匹配性。

本文开展了不锈钢表面进行不同改性处理对提升单组分聚氨酚单组分聚氨酯密封胶与其粘接性的研究。通过施加底涂来提升玻璃、橡胶、钢等材料表面的粘接性已经有很多报道，然而关于本文所用的单组分聚氨酚单组分聚氨酯密封胶与不锈钢之间的粘接性研究还未见报道，本研究以轨道交通车辆中车内地板布与墙板底部的不锈钢踢脚板之间的粘接应用为背景，以期为实际应用提供理论与试验数据支撑。http://www.sdyuantai.com/

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