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正十二硫醇添加份數(shù)對微交聯(lián)型MS密封膠自修復自封堵性能的影響
- 發(fā)布時間 : 2023-3-10 18:03:04
- 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.
正十二硫醇添加份數(shù)對微交聯(lián)型MS密封膠自修復自封堵性能的影響
(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(fā)布時間 : 2023-3-10 18:03:04
- Views:
Information
本節(jié)采用以下測試方法測試MS密封膠膠料自封堵性能:將2mmMS密封膠膠料涂敷于2mm硫化天然膠表面，熱處理后微交聯(lián)化，將針頭來回扎透MS密封膠和硫化膠片同一位置3次，測試存在破孔時此樣品能夠不漏氣的最大壓力，以此直接表征氣密膠的自封堵性，具體方法詳見第二章。
圖3-20為正十二硫醇用量為變量的配方測試自封堵性能的實驗結(jié)果。
如上圖所示，當硫醇用量較少時，MS密封膠的粘性不夠，不足以在較大的氣壓下封堵破孔，而當硫醇用量過大時，MS密封膠的本體強度過低，會發(fā)生內(nèi)聚破壞后被擠出破孔，亦會使得自修復性能失效。在硫醇用量為變量的配方當中，加入4.5份硫醇的試樣能夠承受的壓力最大，比市售品略高，但是存在破孔的硫化膠膠板承受不住壓力，因此發(fā)生了爆炸�？紤]到實驗安全因素，此次實驗之后的自封堵測試實驗都未將壓力設(shè)置在2.SBar以上，若測試時達到2.SBar試樣依然不漏氣，則統(tǒng)一記錄為2.SBar，不再繼續(xù)增壓，因為家用乘用車的胎壓通常就是2.SBar。
但是此方法獲得的優(yōu)劣數(shù)據(jù)也是僅供參考，因為輪胎還存在帶束層，必然比實驗所用的2mm厚的天然膠膠片堅固得多，內(nèi)壁涂敷自修復MS密封膠也不會只有2mm的厚度，且MS密封膠在輪胎破損時受力的力的大小還會因為輪胎破孔尺寸、扎入方式和位置產(chǎn)生不同，實際效果仍需要實際將MS密封膠膠料涂敷至輪胎內(nèi)側(cè)，輪胎充氣并扎破后測試自封堵效果。m.hbxqtax.com
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