Colorless clear flexible polyurethane having high dielectric constant and self-repairing method thereof
A high dielectric constant and polyurethane technology, applied in the field of high dielectric constant flexible polyurethane and its self-repair, can solve the problems of transparent polymers losing high transparency, unable to meet the touch screen conditions, and polymer materials that have not been reported. , to achieve the effect of reversible self-healing, remarkable repairing effect, and outstanding bending ability
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Embodiment 1
[0041](1) At room temperature, mix 100g of hydroxyl-terminated polyalkylene carbonate diol (molecular weight: 2000), 67g of isophorone diisocyanate, 31g of 2,2'-dithiodiethanol, and 0.02g of dilauric acid Dibutyltin and 500 g of dichloromethane were mixed; then the temperature was raised to 55° C., and the temperature was kept for 1 hour to obtain an isocyanate-terminated oligomer solution, which was designated as solution B.
[0042] (2) At room temperature, add 4g of trimethylolpropane, 20g of lithium bistrifluoromethanesulfonimide and 20g of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt to solution B, Then react at a temperature of 60°C for 1h; then pour it into a mold, dry, and form a film to obtain a colorless and transparent flexible polyurethane film with high dielectric constant. Its infrared spectrum, thermal weight loss curve, ultraviolet-visible spectrum, fold Digital photographs before and after and after blower heating, tensile stress-strain curves...
Embodiment 2
[0063] (1) At room temperature, 100g of hydroxyl-terminated polyalkylene carbonate diol (molecular weight: 2000), 50g of hexamethylene diisocyanate, 23g of 2,2'-dithiodiethanol, 0.01g of Dibutyltin dilaurate, 500g of dichloromethane and 500g of chloroform were mixed; then the temperature was raised to 60°C and then kept for 0.5h to obtain an isocyanate-terminated oligomer solution, which was designated as solution D.
[0064] (2) At room temperature, add 9g of trimethylolpropane, 10g of lithium bistrifluoromethanesulfonimide and 40g of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl to solution D imide salt, and then react at a temperature of 60° C. for 1 hour; then pour it into a mold and dry it to obtain a colorless and transparent flexible polyurethane film with high dielectric constant.
[0065] (3) The self-healing method of the colorless, transparent, highly flexible and high-dielectric polyurethane composite material is: self-healing method after fracture. Fully ...
Embodiment 3
[0067] (1) At room temperature, 100g of hydroxyl-terminated polyalkylene carbonate diol (molecular weight: 2000), 105g of cyclohexylmethane diisocyanate, 35g of 2,2'-dithiodiethanol, and 0.03g of dithiol Dibutyltin laurate, 300g of dichloromethane and 300g of 1,2 dichloroethane were mixed; then the temperature was raised to 60°C and then kept for 1 hour to obtain an isocyanate-terminated oligomer solution, which was designated as solution E.
[0068](2) At room temperature, add 11g of trimethylolpropane, 40g of lithium bistrifluoromethanesulfonimide and 30g of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl to solution E imide salt, and then react at a temperature of 40° C. for 1 hour; then pour it into a mold and dry it to obtain a colorless and transparent flexible polyurethane film with high dielectric constant.
[0069] (3) The self-healing method of the colorless, transparent, highly flexible and high-dielectric polyurethane composite material is: self-healing metho...
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