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聚醚對固化后MS密封膠耐老化性能的影響

  • 發布時間 : 2025-12-20 12:19:46
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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.

聚醚對固化后MS密封膠耐老化性能的影響

(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.

  • 發布時間 : 2025-12-20 12:19:46
  • Views:
Information

       本研究分別采用4種聚醚多元醇合成預聚物,不添加抗老化助劑分別制備聚氨醋MS密封膠,對固化后MS密封膠試片進行耐老化性能研究,拉伸強度和伸長率的變化率。由可知,采用制備的MS密封膠綜合耐老化性能最好,6種條件老化后拉伸強度和斷裂伸長率的變化率均滿足HG/T 4363-2012規定的要求(變化率士30% ),其次為EP-330N制備的MS密封膠耐老化性也較好。

       從圖看,紫外光老化、熱老化和戶外自然老化對MS密封膠拉伸強度和斷裂伸長率影響較大,水老化和濕熱老化影響相對較小,其中戶外自然老化是光、熱、水老化的綜合作用。由此分析,紫外光和熱對聚氨醋MS密封膠破壞性較強,水浸泡對MS密封膠的破壞性相對較小。

       MS密封膠試片的表面老化情況見圖,其中圖為光照最強、雨水最多的7、8月份戶外自然老化后30 d表面老化考察情況,圖3是在耐紫外光、耐熱、耐濕熱、耐水老化試片表面老化況。

       由可見,戶外自然條件下老化30 d后,試片表面老化后掉黑粉、流黑水現象已很嚴重。從圖3看出,紫外光老化、熱老化、濕熱老化和水老化后,試片表面掉黑粉情況較輕,幾乎看不出差異。下部是用浸水的脫脂棉球擦拭老化后試片表面的情況,可以看出紫外光老化棉球表面污染最嚴重。4種聚醚所制備聚氨醋MS密封膠產品相比,由Voranol2471制得的樣品老化后膠帶顏色較淺,MN-3050制得的樣品老化后膠帶表面顏色最深。

       綜合圖和圖結果,說明戶外自然老化后,試片表面老化最嚴重;其他4種老化條件相比,以光老化對固化后MS密封膠表面老化的影響最大。http://www.kzgjfl.cn/

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