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不同混合填料配比對免墊片硅烷改性聚氨酯密封膠力學(xué)性能及粘接影響
- 發(fā)布時(shí)間 : 2026-8-8 10:02:11
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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.
不同混合填料配比對免墊片硅烷改性聚氨酯密封膠力學(xué)性能及粘接影響
(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(shí)間 : 2026-8-8 10:02:11
- Views:
不同混合填料配比對免墊片硅烷改性聚氨酯密封膠表干及固化深度的影響。表干時(shí)間和固化速度是研究硅烷改性聚氨酯密封膠性能的重要指標(biāo),在本試驗(yàn)中,將混合不同質(zhì)量比的填料制成樣品,檢測并記錄各個(gè)免墊片密封膠表干時(shí)間和固化深度數(shù)據(jù),其中表為不同混合填料質(zhì)量比所制的免墊片硅烷改性聚氨酯密封膠的表干時(shí)間和固化速度測試對比。
由可知,1#樣品表干時(shí)間最長,固化深度最小,其表干時(shí)間和固化深度分別為10 min和3.5 mm;3#樣品表干時(shí)間最短,固化深度最大,其表干時(shí)間為5 min,固化深度為5 mm;而2#樣品的表干時(shí)間和固化深度均介于1#與3#樣品中間,分別為7 min與4.5 mm這說明在本次實(shí)驗(yàn)中納米碳酸鈣與硅微粉的質(zhì)量比與表干時(shí)間和固化深度有明顯的線性變化關(guān)系,隨著納米碳酸鈣與硅微粉的質(zhì)量比逐漸減小,表干時(shí)間呈明顯減小趨勢,固化深度與之相反。這是由于在填料質(zhì)量一致的情況下,納米碳酸鈣與硅微粉的質(zhì)量比越大,納米碳酸鈣的添加量越大。而納米碳酸鈣的顆粒表面具有親水疏油性,且極性相當(dāng)高,易與極性水分子相結(jié)合而增加其結(jié)晶水含量,當(dāng)免墊片硅烷改性聚氨酯密封膠中所含結(jié)晶水越多時(shí),越容易與組分中的交聯(lián)劑反應(yīng),使得制備膠料表干時(shí)間較長,固化速度減慢。
將1#3#樣品按對應(yīng)標(biāo)準(zhǔn)制件、測試。得到不同混合填料質(zhì)量比所制的免墊片硅烷改性聚氨酯密封膠的力學(xué)性能如所示。
可知,納米碳酸鈣與硅微粉的質(zhì)量比為3:1時(shí),制得免墊片硅烷改性聚氨酯密封膠的硬度最大,同時(shí)力學(xué)性能相對最佳;納米碳酸鈣與硅微粉的質(zhì)量比為2:1時(shí),制得免墊片硅烷改性聚氨酯密封膠的硬度最小,力學(xué)性能相對最差;納米碳酸鈣與硅微粉的質(zhì)量比為5:2所制得的免墊片硅烷改性聚氨酯密封膠各項(xiàng)數(shù)值均處于中間水平。結(jié)合數(shù)據(jù)可以發(fā)現(xiàn),隨著納米碳酸鈣與硅微粉的質(zhì)量比逐漸減小所免墊片硅烷改性聚氨酯密封膠的硬度、拉伸強(qiáng)度和斷裂伸長率均呈減小趨勢。分析原因?yàn)閷?shí)驗(yàn)中納米碳酸鈣與硅微粉相比粒徑更小,活性更強(qiáng)且分散性更好。在本次實(shí)驗(yàn)中所使用納米碳素鈣的補(bǔ)強(qiáng)效果要強(qiáng)于硅微粉,在本次實(shí)驗(yàn)范圍內(nèi)當(dāng)納米碳素鈣用量增加時(shí),補(bǔ)強(qiáng)作用越發(fā)明顯,表現(xiàn)為硬度、拉伸強(qiáng)度和拉斷伸長率提高。http://www.mychangxin.com/
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