起到减振阻尼作用要求聚氨酯密封胶

发布时间 : 2023-2-24 17:41:46
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.

起到减振阻尼作用要求聚氨酯密封胶

(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 : 2023-2-24 17:41:46
Views:

研究可作为叶根聚氨酯密封胶的产品，通过对其基本性能测试:表干时间、实干时间、柔韧性等，验证其在极树型叶根处的可适用性。要求表干时间(即聚氨酯密封胶可操作时间，在指定时间范围内涂敷时具有良好的流动性)在0.5一2 h之间。实干时间在4一24 h之间。由于极树型叶根非平面，不便于涂敷聚氨酯密封胶，所以要求聚氨酯密封胶可采用手动涂敷。由于使用的场合非平面且面积较大，故固化条件要求为室温固化。为了起到减振阻尼的作用要求聚氨酯密封胶有一定的弹性。

对初步所选可使用的聚氨酯密封胶测试其耐高温老化性能和耐腐蚀性能。通过测定环氧类、有机硅类在模拟TRT工作温度200 ℃下，试验30天的耐老化性能。腐蚀试验的模拟腐蚀溶液为饱和NH4C1 (HCl调节pH至3)，因煤气中除了酸性气体(COz, SOz)，还存在部分胺盐，试验100 ℃下30天的耐腐蚀情况。检测老化试验及腐蚀试验前后的拉伸剪切强度变化，聚氨酯密封胶在老化与腐蚀与基材的劲附是否良好。结合TG-D S C曲线与红外谱图综合分析产品性能是否能够满足TRT的工作工况。若所试验的都不满足，则重新进行第一步的筛选，从而确定出最符合TRT极树型叶根的结构聚氨酯密封胶。

对满足可涂敷适用性和满足使用工况的结构聚氨酯密封胶进行模拟件试验，验证其拆卸的便利性。通过Tg曲线，制定合理的热处理过程，对比热处理前后的拆卸力值变化。了解该热处理过程是否为拆卸提供了便利性。

本章内容主要介绍密封材料理化性能检测及腐蚀老化试验所需的原材料、主要设备、所涉及的检测方法、试验方法。在后面的章节中，本章已介绍的内容不再赘述。(1>基本理化性能检测试验试样:试板处理按照GB/T 9271-2008进行。马口铁板:X 50 mm, 400目砂纸打磨后，乙醇擦拭干净、干燥备用。供测定涂层的干燥时间、120涂膜厚度、(2柔韧性使用。老化试验及腐蚀试验拉伸剪切试样:100X25X2 mm的试样板(如图2-1所示)，材质为不锈钢2Cr13。供测定聚氨酯密封胶的老化试验和腐蚀试验拉伸剪切强度的变化。每组热老化试验和耐腐蚀试验均设5组平行试验，以减小试验误差。桦槽模拟件:桦槽及叶根各一件(如图2-2所示)，材质为不锈钢2Cr13。www.sdyuantai.com

Scan the QR code to read on your phone

上一篇: MS密封胶苛刻工况下既要保持性能基本不改变

下一篇: 筛选硅烷改性聚氨酯密封胶可适用性

上一篇: MS密封胶苛刻工况下既要保持性能基本不改变

下一篇: 筛选硅烷改性聚氨酯密封胶可适用性