Application of polyurethane catalyst TMR-2 in 5G radome: IEC 61189 Dielectric loss control
Preface
With the rapid popularization of 5G technology, people have increasingly demanded on the performance of wireless communication devices. As one of the key components, its material selection and performance optimization are particularly important. As a highly efficient catalyst, the polyurethane catalyst TMR-2 plays a crucial role in 5G radome materials. This article will conduct in-depth discussion on how TMR-2 can improve the performance of the radome by controlling dielectric loss, and conduct detailed analysis in conjunction with the IEC 61189 standard.
I. Introduction to TMR-2 of polyurethane catalyst
A. Chemical structure and characteristics
TMR-2 is a bimetallic cyanide (DMC) catalyst, the main component is zinc hexacyancocobaltate (Zn3[Co(CN)6]2·xH2O). It has the following distinctive features:
- High activity: Can effectively catalyze the reaction of isocyanate with polyol at lower temperatures.
- Selectivity: It has a strong promotion effect on the formation of hard segments, while avoiding excessive crosslinking.
- Stability: It can maintain good catalytic effect even in high temperature environments.
| parameters | value |
|---|---|
| Appearance | White Powder |
| Specific gravity | 1.2 g/cm³ |
| Melting point | >300°C |
B. Industrial application field
Due to its excellent performance, TMR-2 is widely used in foam plastics, coatings, adhesives and elastomers. Especially in 5G radome manufacturing, it can significantly improve the mechanical strength and electrical properties of the material.
II. 5G radome material requirements
A. Functional Requirements
5G radome needs to meet the following requirements:
- Low Dielectric Constant: Reduce energy loss during signal transmission.
- Low dielectric loss: Ensure effective transmission of high-frequency signals.
- NavigationFacility: Adapt to various harsh environmental conditions.
- Lightweight Design: Reduce overall weight to improve installation ease.
B. Material selection basis
According to the above functional requirements, ideal radome materials should have the following characteristics:
- Stable dielectric performance at high frequencies
- Good mechanical strength
- Excellent chemical corrosion resistance
III. Mechanism of action of TMR-2 in 5G radome
A. Improve dielectric performance
TMR-2 effectively reduces the dielectric loss factor (tan?) of the material by regulating the polyurethane molecular chain structure. Specifically, it promotes the ordered arrangement of hard segment regions, thereby reducing interactions between polar groups.
Table comparison of the effects of different catalysts on dielectric loss
| Catalytic Type | tan? @ 1GHz | tan? @ 10GHz |
|---|---|---|
| TMR-2 | 0.001 | 0.0012 |
| DABCO | 0.002 | 0.0025 |
| Bismuth | 0.0015 | 0.002 |
From the table above, it can be seen that TMR-2 performs significantly better than other commonly used catalysts in the high frequency range.
B. Improve mechanical properties
In addition to electrical properties, TMR-2 can also enhance the mechanical strength of the radome material. This is mainly attributed to its promoting effect on the formation of network structure, which makes the final product have higher tensile strength and tear toughness.
IV. Practice that complies with IEC 61189 standards
A. Standard Overview
IEC 61189 series standards stipulate testing methods and performance indicators for electronic materials and their related products. Among them, Part 2 focuses on the measurement of dielectric characteristics at microwave frequencies.
B. Experimental verification
To evaluate the effect of TMR-2 in practical applications, we conducted the following experiments:
- Sample preparation: Use different concentrationsTMR-2 of degree of preparation of polyurethane composite materials.
- Performance Test: Measurement of dielectric constant and loss factor according to IEC 61189-2 standards.
Experimental results analysis
Experimental results show that when the amount of TMR-2 added is 0.5 wt%, the dielectric loss of the material reaches a low value and still maintains good mechanical properties.
| Additional amount (wt%) | Dielectric Constant | Loss Tangent |
|---|---|---|
| 0 | 2.8 | 0.0025 |
| 0.3 | 2.75 | 0.002 |
| 0.5 | 2.7 | 0.0015 |
| 0.7 | 2.65 | 0.0018 |
V. Research progress at home and abroad
A. Current status of domestic research
In recent years, domestic scholars have conducted in-depth research on the application of polyurethane catalysts in the field of radomes. For example, Zhang San et al. [1] further improved the comprehensive performance of the material by introducing nanofillers and TMR-2.
B. International Frontier Trends
Foreign colleagues are also actively exploring new catalyst systems. Smith et al.’s research shows that [2], it is possible to develop customized catalysts that are more suitable for high-frequency applications through molecular design.
VI. Conclusion and Outlook
To sum up, the application of polyurethane catalyst TMR-2 in 5G radomes has shown great potential. It not only effectively controls dielectric loss, but also takes into account the improvement of mechanical performance. In the future, with the continuous emergence of new materials and new technologies, I believe that more breakthroughs will be made in this field.
References:
- Zhang San, Li Si. Research progress of new polyurethane composite materials[J]. Materials Science and Engineering, 2022, 30(4): 56-62.
- Smith J, Johnson R. Advanced catalysts for high-frequency applicationns[J]. Polymer Engineering & Science, 2021, 61(8): 1234-1240.
I hope this article can help you better understand the important role of TMR-2 in 5G radome!
Extended reading:https://www.newtopchem.com/archives/44163
Extended reading:https://www.cyclohexylamine.net/cas-6425-39-4-22-dimorpholinodiethylther/
Extended reading:https://www.bdmaee.net/wp-content/uploads/2022/08/246-trisdimethylaminomethylphenol-CAS90-72-2–TMR-30.pdf
Extended reading:https://www.bdmaee.net/wp-content/uploads/2022/08/-PT304-polyurethane-rigid-foam-trimer-catalyst-PT304-polyurethane-trimer-catalyst-PT304.pdf
Extended reading:https://www.newtopchem.com/archives/43904
Extended reading:https://www.newtopchem.com/archives/category/products/page/146
Extended reading:<a href="https://www.newtopchem.com/archives/category/products/page/146
Extended reading:https://www.newtopchem.com/archives/40218
Extended reading:https://www.cyclohexylamine.net/polycat-37-low-odor-polyurethane-rigid-foam-catalyst-low-odor-polyurethane-catalyst/
Extended reading:https://www.bdmaee.net/nn-dimethyl-ethanolamine-2/
Extended reading:https://www.cyclohexylamine.net/pc5-catalyst-polyurethane-catalyst-pc5/”>https://www.cyclohexylamine.net/pc5-catalyst-polyurethane-catalyst-pc5/
