High resilience star multi-block polymer and preparation method thereof

Abstract

The invention discloses a high resilience star multi-block polymer and a preparation method of the star multi-block polymer. The star multi-block polymer is prepared from the following ingredients byweight percentage: 36-50% of conventional SEBS, 6-30% of star SEBS, 40% of white oil, 3% of a liquidity modifier, 0.5% of a smooth agent and 0.5% of an antioxidant. Chemical cross-linking points in addition to a physical cross-linking points are generated in a system; the stability of the chemical cross-linking points is greatly higher than that of the physical cross-linking points; a structure ofthe polymer is not damaged easily by stress in an extension / compression process; the probability of permanent deformation is reduced; in addition, since the cross-linking density is improved, a longmolecular chain rubber phase exists between the cross-linking points; a short molecular chain rubber phase and a long and short chain mixed rubber phase are also generated; long molecular chains and short molecular chains interact with each other; the quick recovery ability after deformation and displacement generated by the action of the stress is improved; and the extension / compression deformation of the polymer can be greatly reduced when the long molecular chains and the short molecular chains are combined.

Description

technical field [0001] The invention relates to a star-shaped multi-block polymer with high resilience and a preparation method thereof. Background technique [0002] With the development of science and technology and the improvement of people's living standards, consumers not only have higher and higher requirements for the appearance, feel, comfort of use, non-toxic environmental protection and ergonomics of polymer materials, but also More emphasis on product functionality. Thermoplastic Elastomer (TPE for short) simply has the physical properties of cross-linked vulcanized rubber: mainly high elasticity, aging resistance, oil resistance, etc.; it also has the processing properties of thermoplastics: it can be injection molded, extruded, blown, etc. Plastic and so on. The processing process of TPE material is simple, the processing cost is low, and it can be recycled and reused. It becomes a new type of synthetic material that replaces polymer materials such as vulcaniz...

AI Technical Summary

Problems solved by technology

[0014] However, compared with cross-linked rubber materials, no matter how the existing formula is adjusted, the current blended modified TPE (SEBS or other TPE materials) usually still has many disadvantages in its practical application, especially for long-term There is still a certain irreversible permanent deformation when the tension / compression, or the tension / compression type has a large rate of change, or the ambient temperature is high

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