纳米碳酸钙对MS密封胶热老化性能的影响

发布时间 : 2025-11-28 16:35:50
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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.

纳米碳酸钙对MS密封胶热老化性能的影响

(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 : 2025-11-28 16:35:50
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为考察纳米碳酸钙对MS密封胶固化物热性能影响，本组研究采用同一批亲水性预聚物，固定亲水性预聚物加量和填料加量，分别采用重质碳酸钙、乳聚PVC、无处理纳米碳酸钙、活性纳米碳酸钙CaC03-2为填料制备PUS ,PUS-PVC ,PUS-。和PUS-1共4种遇水膨胀聚氨醋MS密封胶固化物样品。通过在氮气氛下的热失重考察其热失重性能，结果见图。

由图可见，4种MS密封胶固化物在。一800℃范围内都经历两个阶段热失重过程，且第一阶段热失重都发生在200-400℃温度范围内。比较4条热分析曲线可看出，在第一阶段热失重温度范围内，未添加纳米CaC03的MS密封胶固化物样品PUS和PUS-PVC的失重速率明显大于添加纳米CaC03的PUS-OPUS-1，而添加未处理和处理的纳米CaC03的PUS-OPUS-1MS密封胶热失重速率基本一致。添加纳米CaC03的MS密封胶PUS-0和PUS-1第二阶段热失重是从620℃开始，至725℃结束。未添加纳米CaCO:的样品PUS和PUS-PVC，第二阶段热失重开始于480℃，至610℃结束。以上说明，添加纳米CaC03的遇水膨胀聚氨醋MS密封胶固化物热分解温度有提高，表明MS密封胶固化物的热稳定性提升。

结论

(1)经表面活化处理的粒径适合的活性纳米碳酸钙对遇水膨胀聚氨醋体系能产生较好的触变效果和良好的分散性。

(2)活性纳米碳酸钙在遇水膨胀聚氨醋体系具有较好的补强和体积膨胀率提升效果，MS密封胶固化物的拉伸强度、剪切强度、断裂伸长率、体积膨胀率均有提升。

(3)添加纳米CaC03可提高MS密封胶固化物的热稳定性，热分解温度有提升。http://www.sdyuantai.com/

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