The best rubber material for tensile strength and ranking
Rubber is an important elastic polymer material, and its mechanical properties, including tensile strength, elongation at break, wear resistance, tear resistance, etc., are widely used in industrial, aviation, aerospace, and consumer fields. Tensile strength is a key indicator to evaluate the mechanical properties of rubber materials and usually refers to the maximum tensile force that a material can withstand before breaking per unit cross-sectional area. The following discusses the top rubber materials in terms of tensile strength from the perspective of chemical structure, performance characteristics, and specific application fields.
The following is a ranking and detailed description of common high-performance rubbers based on tensile strength as the main criterion:
Polyurethane Rubber (PU)
Tensile strength range: 30–50 MPa
Polyurethane rubber is one of the most mechanically outstanding elastomers, with extremely high tensile strength and elongation at break (up to 500%).
Molecular structure advantages: The hard segments (aromatic or aliphatic isocyanates) and soft segments (polyether or polyester) in the molecular chain are alternately arranged, giving it excellent tensile and tear resistance.
Performance characteristics: Polyurethane rubber has the highest tensile strength of all rubber materials, and has both abrasion resistance and impact resistance.
Applications: Mainly used for parts in high-load environments, such as conveyor belts, rollers, shock-absorbing pads, oilfield machinery parts, etc.
Natural Rubber (NR)
Tensile strength range: 20–30 MPa (higher after vulcanization)
Natural rubber is a polyisoprene polymer extracted from rubber trees, and its unique molecular structure gives it high elasticity and excellent tensile strength, especially after vulcanization.
Molecular structure advantages: The molecular backbone of natural rubber contains a large number of cis-1,4-polyisoprene structures, which makes it effective and evenly distributed during the tensile process.
Performance characteristics: Natural rubber has extremely high elongation at break (up to 500%~700%) when stretched, and can show excellent tear resistance under high loads.
Applications: Due to its tensile strength and fatigue resistance, it is widely used in tires, seals, shock absorbers, conveyor belts, and other fields that require high mechanical strength.
Polybutadiene Rubber (BR)
Tensile strength range: 15–25 MPa
Butadiene rubber is known for its extremely high elasticity and good resistance to crack propagation, and its tensile strength is significantly enhanced after vulcanization and blending, making it an important material in many industrial fields.
Nitrile Butadiene Rubber (NBR)
Tensile strength range: 10–20 MPa (significantly increased after vulcanization)
Nitrile rubber is widely used in industrial products due to its oil resistance and good mechanical strength, especially suitable for chemically corrosive environments.
Ethylene propylene diene monomer (EPDM)
Tensile strength range: 10–18 MPa
EPDM has excellent weather resistance, ozone resistance, and heat resistance, and is widely used in the automotive and construction fields.
Silicone Rubber (VMQ)
Tensile strength range: 6–15 MPa
Silicone rubber is known for its resistance to high and low temperatures, and despite its low tensile strength, it excels in the aerospace and medical fields.
Fluorocarbon Rubber (FKM)
Tensile strength range: 10–18 MPa
Fluoroelastomers excel in chemical and high-temperature environments and are primarily used in specialty applications that are resistant to corrosion and high temperatures.
| Rubber type | Tensile Strength (MPa) | Elongation at break (%) | Key Advantages |
|
PU |
30–50 |
500–800 |
Extremely high tensile strength and abrasion resistance |
|
NR |
20–30 |
500–700 |
High elasticity and breaking strength |
|
BR |
15–25 |
400–600 |
Good resistance to crack propagation |
|
CR |
10–20 |
200–300 |
Weatherability, oil resistance, and flame retardancy |
|
NBR |
10–20 |
250–350 |
Excellent oil and chemical resistance |
|
EPDM |
10–18 |
300–400 |
Aging resistance and ozone resistance |
|
VMQ |
6–15 |
150–300 |
High and low-temperature resistance and biocompatibility |
In terms of comprehensive performance, polyurethane rubber occupies the first place with the highest tensile strength and wear resistance, while natural rubber ranks second with its high elasticity and strength. Neoprene is an important material in engineering and industry due to its well-balanced tensile strength (15–25 MPa after vulcanization) and excellent weather resistance and flame retardancy. Depending on the requirements of the specific application, different rubber materials have their optimal range of use and advantages.
