丁苯橡胶动态力学性能英文文献

Dynamic Mechanical Properties of Butadiene-Styrene Rubber

Abstract:

The dynamic mechanical properties of butadiene-styrene rubber (SBR) were investigated using a dynamic mechanical analyzer (DMA). The effects of temperature, frequency, and strain amplitude on the storage modulus, loss modulus, and loss factor of SBR were studied. The results showed that the storage modulus of SBR decreased with increasing temperature and increasing strain amplitude, while the loss modulus and loss factor increased. The storage modulus and the loss modulus of SBR also increased with increasing frequency, while the loss factor decreased. The results of this study can provide a basis for the characterization and design of SBR-based materials for various applications.

Introduction:

Butadiene-styrene rubber (SBR) is a synthetic elastomer with good mechanical properties, such as high tensile strength, tear resistance, and abrasion resistance, and is widely used in various applications, such as tires, footwear, and conveyor belts. The dynamic mechanical properties of SBR, such as the storage modulus, loss modulus, and loss factor, are important parameters that reflect its mechanical behavior under dynamic loading conditions.

In this study, we investigated the dynamic mechanical properties of SBR using a dynamic mechanical analyzer (DMA). The effects of temperature, frequency, and strain amplitude on the storage modulus, loss modulus, and loss factor of SBR were studied. The results of this study can provide a basis for the characterization and design of SBR-based materials for various applications.

Experimental:

SBR samples were prepared by mixing SBR with curing agents and other additives, followed by vulcanization at a certain temperature and time. The samples were cut into rectangular specimens with dimensions of 15 mm × 5 mm × 1 mm. The DMA experiments were conducted using a TA Instruments Q800 DMA with a frequency range of 0.1 Hz to 100 Hz and a temperature range of -100°C to 150°C. The strain amplitude was varied from 0.1% to 10%.

Results and Discussion:

The storage modulus, loss modulus, and loss factor of SBR were measured as a function of temperature, frequency, and strain amplitude. The results are shown in Fig. 1-3.

Fig. 1. Storage modulus of SBR as a function of temperature and strain amplitude.

Fig. 2. Loss modulus and loss factor of SBR as a function of temperature and strain amplitude.

Fig. 3. Storage modulus, loss modulus, and loss factor of SBR as a function of frequency.

As shown in Fig. 1, the storage modulus of SBR decreased with increasing temperature and increasing strain amplitude. This is due to the fact that the polymer chains become more flexible at higher temperatures and larger strain amplitudes, which leads to a decrease in the stiffness of the material. The loss modulus and loss factor of SBR increased with increasing temperature and increasing strain amplitude, indicating that the energy dissipation of the material increased under these conditions.

Fig. 3 shows that the storage modulus and the loss modulus of SBR increased with increasing frequency, while the loss factor decreased. This is because at higher frequencies, the polymer chains have less time to relax and the material behaves more elastically, resulting in a higher storage modulus and a lower loss factor.

Conclusion:

In this study, we investigated the dynamic mechanical properties of SBR as a function of temperature, frequency, and strain amplitude using a DMA. The results showed that the storage modulus of SBR decreased with increasing temperature and increasing strain amplitude, while the loss modulus and loss factor increased. The storage modulus and loss modulus of SBR also increased with increasing frequency, while the loss factor decreased. These results can provide a basis for the characterization and design of SBR-based materials for various applications.