Self-repairing repeatable-processed polysiloxane elastomer, preparation method and application
A technology of repeated processing and polysiloxane, which is applied in the field of new materials, can solve the problems of high reprocessing temperature, poor mechanical properties, mechanical properties and self-repairing properties can not be improved at the same time, to improve mechanical strength and simple synthesis process easy to control effect
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[0025] A self-healing and reproducible polysiloxane elastomer with the following general structural formula:
[0026]
[0027] Among them, R and R1 are long chains composed of carbon, hydrogen, oxygen, and nitrogen.
[0028] A preparation method of a self-healing and reproducible polysiloxane elastomer, comprising the following steps: 3-13 parts by weight of crosslinking agent, 79 parts by weight of amino-terminated polydimethylsiloxane, 8~ 18 parts by weight of diisocyanate and 1 to 5 parts by weight of metal ion catalyst were dissolved in tetrahydrofuran to obtain a mixed solution. The concentration of the mixed solution was controlled to be 0.1 to 0.6 g / mL, and the reaction was stirred at room temperature for 5 minutes; then the prepolymer was poured Put it into a polytetrafluoroethylene mold and cure at room temperature for 24 hours, then put it in an oven at 80° C. to continue curing for 4 hours, and then take it out of the mold to obtain a self-healing and repeatable polysilo...
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