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A組分NC對硅烷改性聚氨酯密封膠的影響
- 發(fā)布時間 : 2025-3-19 17:33:52
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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.
A組分NC對硅烷改性聚氨酯密封膠的影響
(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(fā)布時間 : 2025-3-19 17:33:52
- Views:
Information
將不同聚氨酷預(yù)聚體(pre-PU-A 1, pre-PU-A2 ,pre-PU-A3 , pre-PU-A4, pre-PU-AS)制備的硅烷改性聚氨酯密封膠用于薄膜復(fù)合，并對復(fù)合膜性能進行測試。圖3是水煮前后各層剝離力和熱合強度的測試結(jié)果。隨。NC'。增大，硅烷改性聚氨酯密封膠硬段質(zhì)量分數(shù)略微增加，軟段中PET-B質(zhì)量分數(shù)由43.7%增加至50.9% o RCPP/Al(耐蒸煮聚丙流延膜/鋁箔)層的剝離力隨預(yù)聚體。NC'。增大呈現(xiàn)先減小后增大趨勢，這是因為硅烷改性聚氨酯密封膠剛性增加，與基材貼合程度降低。而隨著。NC'。進一步增加，PET-B中環(huán)的缺電子結(jié)構(gòu)與鋁箔表面靜電吸附作用增加，剝離力增大。PET/Al}聚對苯二甲酸乙二醇酷/鋁箔)層剝離力先增大后減小，這是由于PET-B質(zhì)量分數(shù)增加，硅烷改性聚氨酯密封膠對鋁箔吸附作用增強，應(yīng)力作用導(dǎo)致硅烷改性聚氨酯密封膠從PET膜上剝離。熱合強度隨。NC'。增加而增大，可能是因為硅烷改性聚氨酯密封膠剛性增大使得復(fù)合膜強度增強。經(jīng)水煮后，硅烷改性聚氨酯密封膠各層剝離力隨預(yù)聚體。NC'。增大而增大，這是因為PET-B中含有苯環(huán)和帶有支鏈的綜上，r}N}.o=17%時，聚氨酷預(yù)聚體茹度較小，所制備的聚氨酷硅烷改性聚氨酯密封膠易于涂覆且水煮后剝離力較高，因此優(yōu)選聚氨酷預(yù)聚體的。Nco I 7%。PET-A分子量對硅烷改性聚氨酯密封膠鉆度的影響在40℃條件下，持續(xù)測試由不同PET-A制備的聚氨酷硅烷改性聚氨酯密封膠茹度。測試結(jié)果如圖4所示，隨PET-A分子量減小，預(yù)聚體中游離MDI減少，與輕基的反應(yīng)性降低，硅烷改性聚氨酯密封膠茹度達到5 000 mPas所需時間由40 min增加至 48 min。硅烷改性聚氨酯密封膠達到5 000 mPa}s的時間反映了硅烷改性聚氨酯密封膠的固化速率，隨原料組成PET-A分子量減小，硅烷改性聚氨酯密封膠固化速率下降。http://ago-games.com/
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