Thermoplastic elastomer of hydropolymer and method for preparing same

Abstract

The invention relates to a thermoplastic elastomer of hydropolymer and a method for preparing the same. The thermoplastic elastomer is mainly applied to aerospace sealing and sealing and shockproof protectors in the fields of electronics, electric power, energy, communication and the like. For the thermoplastic elastomer, the polymer molecular weight is between 100,000 and 500,000, the S-EEP-S three-block structure is adopted, wherein S is a polystyrene section, EEP is an alkadiene section, the melting-contact point is more than or equal to 230 DEG C, the tearing strength is between 40 and 70Ma, the breaking elongation is between 1,500 and 1,900 percent, and the deformation rate is less than or equal to 2 percent; the elastomer can resist acid, alkali and temperature, the temperature resistant range is that the high temperature is 80 DEG C, and the low temperature is 40 DEG C below zero; moreover, the elastomer can shield ultraviolet rays, the anti-ageing capability is 10 years, and the toughness and the strength ISO37 are 10 times of 3MPa.

Description

technical field [0001] The invention relates to an elastomer, especially a hydrogenated polymer thermoplastic elastomer, which is mainly used in sealing and shockproof protective gear in the fields of aerospace, aviation sealing, electronics, electric power and energy communication. At the same time, the invention also relates to a The preparation method of the thermoplastic elastomer. Background technique [0002] Since the discovery of thermally induced shape memory polymer cross-linked polyethylene, shape memory functional polymer materials have been greatly developed, and have received extensive attention as a branch of functional materials. Compared with other functional materials, shape memory functional polymer materials have six major characteristics: (1) large deformation, easy to use; (2) sufficient raw materials, many varieties, wide range of shape memory recovery temperature; (3) light weight, Easy to pack and transport; (4) easy to process, easy to make special...

AI Technical Summary

Problems solved by technology

This requires a high sense of responsibility for the operator, and the operation is time-consuming and laborious. A slight negligence may affect the quality of the project, and the high-altitude operation is more dangerous.

The rubber tape is exposed to wind, sun, and aging very quickly outdoors, and it is prone to breakage. This will lose the effective protection of the joints, which not only reduces the operation quality of the communication network, but also greatly increases the daily maintenance workload of the antenna feeder system.

The emergence of shape memory polymer materials has effectively solved the above problems, but the existing materials still have deficiencies, such as: (1) poor thermal stability, small molding temperature range, generally between 200 ~ 220 ℃, more than 280 Severe decomposition at ℃; (2) Poor fluidity, overflowing when the molding gap is 0.06mm, fluidity is sensitive to temperature, and slow cooling speed; (3) Large shrinkage rate, difficult to process molded products, and easy to cause appearance defects; (4) ) High viscosity, sensitive to shearing, slow cooling, high requirements for forming molds

Therefore, the sealing effect cannot be better achieved, and the application environment temperature is limited to a certain extent.

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