The main difference between Buna N and Viton is that Buna N is a copolymer of butadiene and acrylonitrile, whereas Viton is a copolymer that has high amounts of units containing fluorine.
Buna N and Viton are two distinct elastomers widely used in the manufacturing industry for various applications.
Key Areas Covered
1. What is Buna N
– Definition, Features, Applications
2. What is Viton
– Definition, Features, Applications
3. Similarities Between Buna N and Viton
– Outline of Common Features
4. Difference Between Buna N and Viton
– Comparison of Key Differences
5. FAQ: Buna N and Viton
– Frequently Asked Questions
Key Terms
Buna N, Viton, Rubber
What is Buna N
Buna N, also known as nitrile rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. This elastomer is widely used in various industries due to its excellent oil resistance, high tensile strength, and durability. The acronym “N” in Buna N represents the presence of nitrile groups in the polymer structure, which contribute to its unique properties.
One of the key characteristics of Buna N is its remarkable resistance to oils, fuels, and other hydrocarbons. This makes it a preferred material for applications where exposure to these substances is common, such as in automotive seals, gaskets, and O-rings. Buna N’s ability to maintain its integrity in the presence of oil contributes to the longevity and reliability of components in engines and machinery.
Figure 1: Buna N
The high tensile strength of Buna N makes it suitable for applications requiring resilience and flexibility. It can withstand mechanical stress and deformation without losing its structural integrity, making it ideal for seals and gaskets in dynamic environments. Additionally, Buna N exhibits good abrasion resistance, further enhancing its suitability for various industrial settings.
Buna N also boasts a wide temperature range of usability, making it versatile across different climates and operating conditions. Its resistance to heat and cold allows it to perform consistently in applications ranging from automotive engines to refrigeration systems.
What is Viton
Viton is a brand of synthetic rubber known for its exceptional chemical resistance and thermal stability. Viton is widely used in various industries for its resilience in harsh environments. Its unique properties make it a preferred material for seals, gaskets, O-rings, and other components in applications where exposure to extreme temperatures, aggressive chemicals, and corrosive substances is common.
One of Viton’s key advantages is its resistance to a broad spectrum of chemicals, including acids, fuels, oils, and solvents. This makes it a reliable choice in industries such as automotive, aerospace, chemical processing, and oil and gas. The ability of Viton to maintain its integrity and functionality under challenging conditions enhances the durability and longevity of the products it is used in.
Figure 2: Viton
Furthermore, Viton exhibits excellent high-temperature stability, maintaining its elasticity and sealing properties even in extreme heat. This characteristic is crucial in applications where temperature fluctuations are prevalent, such as in engine components, industrial machinery, and sealing systems for aerospace equipment.
The versatility of Viton extends to its compatibility with various fluids and gases, contributing to its widespread use in sealing solutions. Its resistance to swelling and degradation when in contact with diverse substances enhances its reliability in sealing applications, ensuring a consistent and effective barrier against leaks.
While Viton has proven to be a robust and reliable material, it is essential to consider its cost-effectiveness relative to the specific requirements of an application. As a premium synthetic rubber, Viton may have a higher initial cost compared to other elastomers, but its performance and longevity often justify the investment.
Similarities Between Buna N and Viton
- Buna N and Viton are two types of elastomers.
- They exhibit good resistance to various oils, fuels, and chemicals.
Difference Between Buna N and Viton
Definition
Buna N, also known as nitrile rubber, is a synthetic rubber copolymer characterized by its excellent resistance to oil, fuel, and other chemicals. Viton, on the other hand, refers to a family of fluoroelastomers known for their exceptional resistance to high temperatures, chemicals, and fuels.
Resistance
Buna N is generally resistant to oils, fuels, and some chemicals, whereas Viton offers broader chemical resistance, especially to harsh chemicals and solvents.
Temperature
Moreover, Buna N is suitable for moderate temperature applications, while Viton can withstand higher temperatures.
Cost
Buna N is generally more cost-effective compared to Viton.
FAQ: Buna N and Viton
What is the disadvantage of Viton?
Viton’s low-temperature performance is one of its main disadvantages.
Is Buna-N fuel resistant?
Buna-N is known for its unusually high resistance to oils, fuels, and other chemicals.
Is Buna-N natural or synthetic?
‘BUNA-N’ is used as a synthetic rubber
Conclusion
Buna N and Viton are two types of elastomers. The main difference between Buna N and Viton is that Buna N is a copolymer of butadiene and acrylonitrile, whereas Viton is a copolymer that has high amounts of units containing fluorine.
Reference:
1. “Nitrile Rubber.” Wikipedia. Wikipedia Foundation.
2. “What is Viton? Our essential guide.” Martins Rubber.
Image Courtesy:
1. “NBR balles” By Cjp24 – Own work (CC BY-SA 3.0) via Commons Wikimedia
2. “O-ring collection” By Ahellwig – Own work (CC BY 2.5) via Commons Wikimedia
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