1. Comparison of two kinds of resilience of TPE materials

The influence factors and application fields of heat resistance and room temperature resilience of TPE materials are very different.

A) Resilience at room temperature

Performance:

Under normal temperature conditions, when subjected to external force, TPE can deform and quickly return to its original shape after external force removal.

The room temperature resilience is affected by molecular weight, block ratio, structure and solubility parameters of TPE materials.

Application scenario:

TPE room temperature resilience can meet the requirements of seals, seals, seals, suction cups, tension bars, yoga belts, cushioning cushions and other applications.

B) Heat resistance resilience

Performance:

In the high temperature environment, the molecular chain movement of TPE material accelerates, resulting in the softening of the material and the reduction of resilience.

The thermal resilience of TPE is affected by the high temperature stability, thermal aging properties and molecular chain structure.

The maximum temperature of TPE is about 80 degrees Celsius, beyond this temperature range, the resilience of TPE will decrease significantly.

Influencing factors:

Temperature: High temperature will accelerate the aging process of TPE materials, resulting in changes in the molecular chain structure, thereby reducing the resilience. The longer the exposure time at high temperature, the more obvious the reduction of resilience of TPE material.

Material formulation: Different TPE formulations have different heat resistance properties. By adjusting the composition and proportion in the formula, the heat resistance resilience of TPE can be improved.

Application scenario:

Applications such as seals in automotive engine compartments and shock absorbers in high temperature environments require high heat resilience of TPE.

Second, how to improve the resilience of TPE materials through the formula

A) Improve resilience at room temperature

1. Add a small amount of POE in the formula to improve resilience.

2. Appropriately reduce the ratio of PP and filler in the formula and increase the ratio of SEBS.

3. Select SEBS with large molecular weight and linear structure, and properly fill less oil.

B) Improve high temperature resilience

1. In the formulation of TPE, POE that is not resistant to temperature difference should be avoided.

2. Select SEBS with high molecular weight and high butadiene content.

3. Introduce crosslinkers such as DCP to form chemical bonds between SEBS molecular chains and increase their cohesion strength and elasticity.