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      解析溫度對聚氨酯密封膠樣品的影響

      • 發布時間 : 2024-5-8 18:39:19
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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.

      解析溫度對聚氨酯密封膠樣品的影響

      (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 : 2024-5-8 18:39:19
      • Views:
      Information

             隨著聚氨酯密封膠樣品管解析時間的延長,測得的D3一D。含量增加,超過40 min后測試結果趨于穩定。這可能是因為隨著解析時間的增加,萃取的體積也增加,使得聚氨酯密封膠樣品中D3一D,。含量提高,直到40 min后萃取完全。因此,本實驗選擇的最佳解析時間為40 min。

             按SIM掃描法測定并比較5種解析溫度(60, 80, 100, 120和140 ℃)對二甲基環硅氧烷萃取效率的影響,結果可見,溫度在60一140℃范圍內時,隨著聚氨酯密封膠樣品溫度的升高,測得的D3一D,?偤恳采仙。這可能是因為二甲基環硅氧烷多為揮發性、半揮發性物質,隨著溫度的上升將加速甚至加倍釋放。

      分析方法的重復性

             取巧mg密封膠聚氨酯密封膠樣品,于100℃條件下按上述選擇的最佳條件重復測試3次,計算相對標準偏差(RSD),結果見表3。實驗收集了2種密封膠聚氨酯密封膠樣品,按上述色譜分析條件,對D3一D,。進行了檢測。結果表明,這2種聚氨酯密封膠樣品中均存在D3一D io,且總含量隨著測試溫度的升高而增加。當處于80 ,  100和120 ℃時,單一成分含量均小于100 g/g。聚氨酯密封膠樣品A中環硅氧烷總含量為100一360 g/g,聚氨酯密封膠樣品B中環硅氧烷總含量為200一450 g/g。

             本實驗采用TD一GCMS測定了有機硅密封膠中的二甲基環硅氧烷(D3一D io)含量,具有操作簡便、測試周期短、經濟適用、覆蓋范圍廣等優點,適用于密封膠中環硅氧烷含量的測定,也為其它各類密封膠中環硅氧烷的測試提供了一種新的分析方法。http://m.inaodoi.com/

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