Properties of cis-butadiene rubber
🕙 2024-10-30 👆
Cis-butadiene rubber (BR), a type of synthetic rubber made primarily from polybutadiene, is known for its high resilience, flexibility, and abrasion resistance. These properties make it especially suitable for applications like tires and other products that undergo significant wear. Here are its primary characteristics:
1. High Resilience and Elasticity
· Cis-butadiene rubber has excellent resilience, meaning it can recover quickly from deformation, making it suitable for applications requiring impact resistance and bounce, like tires and footwear.
2. Exceptional Low-Temperature Flexibility
· This rubber maintains flexibility at very low temperatures (down to about -60°C), which makes it ideal for applications in cold environments, such as snow tires and seals.
3. Good Abrasion Resistance
· Cis-butadiene rubber offers high abrasion resistance, which is valuable in products subjected to friction and wear, such as conveyor belts, tire treads, and shoe soles.
4. Low Rolling Resistance
· It has low rolling resistance, meaning it generates less heat and friction during movement. This is particularly beneficial for automotive tires, as it enhances fuel efficiency and reduces heat buildup.
5. Excellent Tear and Crack Resistance
· The material’s resilience against tearing and cracking under repeated stress allows it to withstand heavy-duty applications, increasing its longevity in products like tires and industrial belts.
6. Moderate Tensile Strength
· While cis-butadiene rubber has a moderate tensile strength compared to other rubbers, it can be blended with other materials (like natural rubber) to improve its strength in applications that demand more durability.
7. Good Chemical Resistance (but limited oil resistance)
· It is resistant to certain chemicals, though it is not highly resistant to oils or solvents, which limits its use in environments with high oil exposure.
8. Vulnerability to Ozone and UV Degradation
· Cis-butadiene rubber is sensitive to ozone and ultraviolet light, which can lead to cracking and degradation over time, especially in outdoor applications.
9. Enhanced Durability Through Blending
· Often blended with other rubbers, like natural rubber and styrene-butadiene rubber (SBR), to optimize its properties, such as improving its resistance to aging, heat, and wear.
Applications of Cis-Butadiene Rubber:
· Primarily used in the automotive industry, cis-butadiene rubber is common in tire treads, conveyor belts, gaskets, seals, and footwear due to its resilience, flexibility, and wear resistance.
The unique properties of cis-butadiene rubber, especially its resilience and low-temperature flexibility, make it highly effective for applications requiring durability and elasticity, although it often requires additives or blends to improve resistance to environmental factors like UV and ozone.
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