A kind of anti-ultraviolet self-healing polymer and preparation method and application thereof
A polymer, self-healing technology, applied in the field of preparation of anti-ultraviolet self-healing polymers, can solve the problems of unsatisfactory mechanical properties, low self-healing ability, affecting ultraviolet absorption, etc., to achieve easy promotion and application, strong self-healing performance , the effect of easy availability of raw materials
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0026] In one embodiment of the present invention, a preparation method of an anti-ultraviolet self-healing polymer is provided, and the method steps are as follows:
[0027] Dissolving the polyoxypropylene, the double-ended dihydroxy compound containing an aldehyde group and the catalyst in a solvent, stirring uniformly, adding diisocyanate, under mechanical stirring, heating up and reacting to obtain a polymer SA-PU solution containing an aldehyde group in the side chain;
[0028] After cooling the SA-PU solution of the polymer containing aldehyde groups in the side chain, add the ethanol solution of diaminoazobenzene, stir evenly, let it stand for reaction at room temperature, and volatilize the solvent until the obtained film material has a constant weight, that is, anti-ultraviolet self-healing is obtained. Polymer membrane material (RUv-SPU);
[0029] In a specific embodiment, the cooling is cooling to 0-5°C;
[0030] In a specific embodiment, the step of degassing unde...
Embodiment 1
[0060] Step 1: Preparation of branched aldehyde group-containing polymers:
[0061] Dissolve 12g of polypropylene oxide, 0.65g of 4-bromo-2,3-dihydroxybenzaldehyde and 0.02g of dibutyltin dilaurate in 30mL of DMF, stir evenly, add 1.5g of diphenylmethane diisocyanate, Under mechanical stirring, the reaction was carried out at 75 °C for 2.5 h to obtain a polymer (SA-PU) solution with branched aldehyde groups;
[0062] Step 2: Preparation of UV-resistant self-healing polymer:
[0063] Cool the SA-PU solution to 0-5°C, add 4.25mL of 4,4'-diaminoazobenzene in ethanol (0.05g / mL), stir evenly, remove the gas under reduced pressure, and then slowly Pour it into a mold, let it stand for 3 hours at room temperature, and finally evaporate the solvent at 40 °C until the obtained film material has a constant weight, about 48 hours, to obtain an anti-ultraviolet self-healing polymer film material (RUv-SPU), denoted as P 1 .
Embodiment 2
[0065] Step 1: Preparation of branched aldehyde group-containing polymers:
[0066] Dissolve 30g of polypropylene oxide, 0.42g of 2,5-dihydroxybenzaldehyde and 0.04g of stannous octoate in 65mL of DMF, stir evenly, add 1.5g of diphenylmethane diisocyanate, under mechanical stirring, at 80°C The reaction was carried out for 2.5h to obtain a polymer (SA-PU) solution whose branched chain was an aldehyde group;
[0067] Step 2: Preparation of UV-resistant self-healing polymer:
[0068] Cool the SA-PU solution to 0-5°C, add 4.25mL of ethanolic solution of 2,4'-diaminoazobenzene (0.05g / mL), stir evenly, remove the gas under reduced pressure, and pour it slowly. Put it into the mold, let it stand for 4 hours at room temperature, and finally volatilize the solvent at 35 °C until the obtained membrane material has a constant weight, about 48 hours, to obtain an anti-ultraviolet self-healing polymer membrane material (RUv-SPU), denoted as P 2 .
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More