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聚氨酯密封膠的伸長率得到提升
- 發布時間 : 2023-3-6 18:51:15
- Views:
(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.
聚氨酯密封膠的伸長率得到提升
(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 : 2023-3-6 18:51:15
- Views:
Information
從圖2可以看到，Si-A1(OH):的初始脫水溫度為298.5℃;升溫至341.7℃時，質量損失28.2%;升溫至900℃時，質量損失35.5%。這一表現與未經表處理的Al(OH)3完全一致，說明表面改性沒有影響無機粒子的耐熱性能，據此可以推測Si-Al(OH)3與Al(OH)3的阻燃性能基本一致。FS-1和FS-2阻燃性能對比測試結果也驗證了這一點。此外，比較FS-1和FS-2的外觀，可以發現FS-1表面有密集的小顆粒，FS-2表面均勻細膩。經過改性以后，粉體與聚氨酯密封膠的相容性大大改善，更容易在聚氨酯密封膠中分散均勻，FS-2相對FS-1外觀得到改善。與之相關的一些理化性能數據如表2所示。從表2中的數據可以看出，FS-2的下垂度得到大幅改善，同時擠出性略有增大。經過表面改性的Si-A1(OH)3在聚氨酯密封膠中應用，可對其理化性能起到一定的改善作用。下垂度的大幅改善，為聚氨酯密封膠的配方設計提供了更多空間，更能滿足用戶填縫密封的施工性需求;而較好的擠出性，有利于在注膠施工過程中省力省時。對FS一1,FS-2,FS-3,FS-4,FS-S,FS-6和FS-7同時做力學性能和阻燃性能測試，對比Al(OH)3,Si-Al(OH)3,Si-Al(OH)3與MA協同阻燃劑體系的各項性能。其中，FS-1添加的是未表面處理的Al(OH)3,其他試樣添加的是硅烷偶聯劑改性的Si-Al(OH)30FS-3,FS-4,FS-S,FS-6和FS-7阻燃劑總添加量均為120份。詳細測試結果匯總于表3中。對比表3中的數據，可以看出:FS-1的最大強度為1.28MPa，拉伸強度最高。添加Si-Al(OH)3的FS-2與FS-1相比，最大強度稍有下降，為1.12MPa;伸長率有較大幅度提升，最大強度伸長率大幅提高到92%}>經表面改性后，極可能是因為氫氧化鋁無機粒子與聚氨酯密封膠的相容性得到改善，使得聚氨酯密封膠的伸長率得到提升。www.pegeankoch.com
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