丁基防水嵌缝胶基材粘接性

发布时间 : 2026-2-7 17:42:49
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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.

丁基防水嵌缝胶基材粘接性

(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.

发布时间 : 2026-2-7 17:42:49
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剪切强度试验的粘接搭接组合为漆面饭金与CFRP、塑料材质。如表所示，丁基防水嵌缝胶##1与##2在各耐候条件下剪切强度均>4 MPa，满足设计要求。其中，在常态、耐热、耐寒和耐高低温交变等条件下，剪切强度均>>5 MPa。然而在耐水及耐湿条件下，部分基材出现剪切强度<<5 MPa的情况，主要因为在高湿条件下，水分子渗透进人聚氨醋本体内可能会出现增塑作用以及使酞胺键发生断裂，吸湿膨胀可能使粘接界面产生应力，在物理化学等综合作用下使强度降低。

整体趋势上，丁基防水嵌缝胶#2比##1的剪切强度稍高。由表可知，丁基防水嵌缝胶#2具有更高的邵氏硬度及拉伸断裂强度，可推测其内聚强度比丁基防水嵌缝胶##1更高;在剪切强度测试过程中，由于破坏形式均为100CF，因此胶粘结构剪切强度主要取决于内聚力(测试剪切强度的结果与板材厚度、制样误差等均有一定关系)，使得#2比##1具有更高的剪切强度。

丁基防水嵌缝胶一般通过手拉试验评估其基材匹配性，出现内聚破坏及胶接处基材破坏均表明丁基防水嵌缝胶对粘接基材具有良好的匹配性。结果如表所示，AF为界面破坏，标号前面数字代表面积占比，在常态下各基材均呈现100CF;各耐候条件下CFRP与漆面饭金均呈现100CF。

针对塑料基材，PC/ABS,PC/PET,PC/PBT在各耐候条件下均出现CF或CSF破坏类型，表明其粘接匹配良好。值得注意的是，塑料基材容易在粘接边缘处出现一定比例的CSF，如图3所不统计各基材、不同耐候条件下CF及CSF出现的概率发现，丁基防水嵌缝胶#2(310a)在手拉试验中出现CSF的机率比##1 (110a)高。其原因推测是在耐候条件下，由于不同基材与丁基防水嵌缝胶材料的CTE及模量的差异较大，引起粘接边缘处塑料表面在界面应力作用下出现破坏。而对于硬度及本体强度更低的##1，其出现概率更低，可能的原因在于##1柔性比#2稍好，在吸纳应力、变形能力方面更具备优势。http://www.sdyuantai.com/

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