Method for improving mechanical property of segmented copolymer thermoplastic elastomer

Abstract

The invention discloses a method for improving a mechanical property of a segmented copolymer thermoplastic elastomer. The method comprises the following steps that uniaxial pre-stretching, equibiaxial pre-stretching or equal multiaxial pre-stretching or biaxial asymmetric pre-stretching is carried out on the segmented copolymer thermoplastic elastomer, then heat relaxation is carried out on the segmented copolymer thermoplastic elastomer under the condition of keeping the pre-stretching, and then the mechanical property and a driving performance of the segmented copolymer thermoplastic elastomer can be improved. The preparation process and equipment are simple and easy to control, the mechanical property is adjustable, and the self-reinforced polymer material can be developed well throughthe method.

Description

technical field [0001] The invention relates to the field of thermoplastic elastomers, in particular to a method for improving the mechanical properties of block copolymer thermoplastic elastomers. Background technique [0002] Polymer materials are usually used in rubber, plastics, coatings and other fields; among them, coatings cannot bear the shearing action of force, and will deform immediately under the action of external force; When the force is large, plastic deformation will occur, and the plastic deformation process is accompanied by the orientation of the polymer chain and the increase of the tensile strength; due to the existence of the chemical cross-linked network, the rubber can undergo large deformation under a small force, and its large deformation Under the condition of elastic recovery, the cross-linked network undergoes obvious stretching orientation under greater stress, accompanied by a sharp increase in tensile strength until the cross-linked network is...

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Problems solved by technology

[0002] Polymer materials are usually used in the fields of rubber, plastics, coatings, etc. Among them, coatings cannot bear the shearing action of force, and will deform immediately under the action of external force; When the force is large, plastic deformation will occur, and the plastic deformation process is accompanied by the orientation of the polymer chain and the increase of the tensile strength; due to the existence of the chemical cross-linked network, the rubber can undergo large deformation under a small force, and its large deformation Under the condition of elastic recovery, the cross-linked network undergoes obvious tensile orientation, accompanied by a sharp increase in tensile strength, until the cross-linked network is destroyed.

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