聚氨酯密封胶标准试验条件下性能

发布时间 : 2022-12-5 11:11:53
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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.

聚氨酯密封胶标准试验条件下性能

(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 : 2022-12-5 11:11:53
Views:

聚氨酯密封胶在标准试验条件下养护28d后进行力学性能测试，强度和伸长率取均值，结果如表1所示。表1强度和伸长率由表1可以看出:聚氨酯密封胶具有较高的强度，改性聚醚结构密封胶次之，硅酮结构密封胶强度较低;聚氨酯密封胶也具有较高的伸长率。虽各类结构密封胶产品可通过调整配方，适当改变其力学性能，但产品的主体结构已决定其最基本的性能参数。短期老化后性能。

1)6种产品在80℃,100℃,120℃,150℃,180℃和200℃分别放置1h，然后在相应温度下观察外观变化并测试力学性能，短期高温后性能结果如表2所示。

从表2和图1中可以看出，短期硅酮结构密封胶耐高温性能优于聚氨酯密封胶、改性聚醚结构密封胶，可以耐温到200℃，外观无明显变化。从性能变化看，硅酮结构密封胶在180℃高温下拉伸强度、伸长率保持较好，在200℃还保持有一定性能;改性聚醚结构密封胶的伸长率衰减较多;聚氨酯密封胶拉伸强度衰减较多、伸长率衰减较多。

2) 6种产品在一20℃、-30℃、-40℃、-45℃和-50℃分别放置1h，然后在相应温度下观察外观变化并测试力学性能，短期低温后性能结果如表3所示。

从表3和图2中可以看出短期耐低温性到一50℃ ,外观无明显变化，从性能变化看，3类结构密封胶低温下强度变大，伸长率先高再降低。

长期老化后性能6种产品分别在80℃ , 120℃ , 150℃ , 180℃高温箱放置720h, 1500h, 3000h和6000h，取出后在标准试验条件下放置24h，观察外观变化并测试力学性能.长期高温后性能结果如表4所示。www.sdyuantai.com

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下一篇: 硅烷改性聚氨酯密封胶长期耐高温性能优于聚氨酯密封胶