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双组份聚氨酯密封胶样品在腐蚀介质中实施拉伸剪切强度试验

  • 发布时间 : 2022-11-14 17:31:57
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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.

双组份聚氨酯密封胶样品在腐蚀介质中实施拉伸剪切强度试验

(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 : 2022-11-14 17:31:57
  • Views:
Information

       将MO-1,M0-2,M0-3型号双组份聚氨酯密封胶样品在腐蚀介质中实施拉伸剪切强度试验。拉伸剪切强度试验依据GB/T528-2010标准,拉伸剪切强度>12 MPa,拉伸剪切试验使用WE/20型液压式万能试验机。将加载速率设置为15 mm/min,拉伸剪切强度计算公式为式中:S是有效搭接面积;破坏时的加载值。是拉伸剪切强度;是测定在不同介质中浸泡72h后的MO-1,MO-2,M0-3样品拉伸剪切强度,粘结强度的保持率,具体方法如公式(2),即K=(1一甲)x 100式中:甲。是耐化学试剂试验前常态下的粘结强度;K是粘结保持率;}P是耐化学试剂试验后粘结强度。
       多组份聚氨酯密封胶按比例混合后或单组份聚氨酯密封胶在原包装打开后,可使用时间就是密封胶适用期,适用期就是密封胶从混合到无回弹整体过程的时间。密封胶的施工工艺性能主要受适用期影响较大,适用期过短,会导致密封胶固化,造成浪费;适用期过长,密封胶的硫化速度过慢,减慢施工速度。掌握合适的适用期对密封胶的性能发挥具有非常重要的意义。
       据分析可知,碳酸钙用量对双组份聚氨酯密封胶适用期影响较大,因此适用期试验过程是在制备好的MO-1,M0-2,M0-3样品中分别加人不同比例碳酸钙,记录表干时间。www.sdyuantai.com

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