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不同質保年限的硅烷改性聚氨酯密封膠老化性能對比
- 發布時間 : 2024-10-1 15:29:51
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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.
不同質保年限的硅烷改性聚氨酯密封膠老化性能對比
(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 : 2024-10-1 15:29:51
- Views:
為了進一步證實質保25年的硅烷改性聚氨酯密封膠產品的性能優勢,選取國內市場上常見的幾種硅烷改性聚氨酯密封膠,采用同樣的方法在鄭州地區自然老化場地同期進行質保25年的硅烷改性聚氨酯密封膠與質保10年的硅烷改性聚氨酯密封膠的性能對比研究(表4)。首先對選取的不同品牌硅烷改性聚氨酯密封膠進行編號,依次為1", 2",3#\4#。其中,1“為深圳工程中使用的具有25年質量保證的硅烷改性聚氨酯密封膠;2u\3#為來自不同廠家的國產普通硅烷改性聚氨酯密封膠;4"為美國進口硅烷改性聚氨酯密封膠。試驗持續30個月,歷次睦育即J岸吉果見表5和圖b0試驗結果表明,1“質保25年的硅烷改性聚氨酯密封膠試樣,經30個月的曝曬和自然老化試驗后,拉伸粘結強度無明顯變化;斷裂伸長率僅在老化初期因深層固化略有上升,之后亦基本穩定。該密封膠經多次自然老化試驗證明具有較優的耐久穩定性能。2"試樣拉伸粘結強度在老化初期(前3個月)有明顯增大(從1.34 MPa增至1.63 MPa),之后逐漸下降到初始值附近波動(1.291.42 MPa);但其斷裂伸長率降低非常明顯,初始斷裂伸長率為15400,到12個月后急劇下降至91 0}o106%,降低了近50% 0 3}試樣拉伸粘結強度和斷裂伸長率均有明顯降低,拉伸粘結強度從初始的0.96MPa降低到30個月時的0.62 MPa;初始斷裂伸長率為229%,僅3個月就急劇下降至74%,之后緩慢降低到30個月時的32%,已失去彈性、變硬變脆。4“試樣,拉伸粘結強度在老化初期(前3個月)有明顯增大(從1.05 MPa增至1.37 MPa),之后呈緩慢降低趨勢,到30個月時降至0.86 MPa;初始斷裂伸長率282% ,僅3個月就急劇下降至160%,之后又緩慢降至30個月時的136%,相比初始斷裂伸長率降低了近1500l0。http://www.ruilingxiang.cn/
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