Three-dimensional circular polarization eyeglasses
A circular polarization, glasses technology, applied in polarizing elements, glasses/goggles, optics, etc., can solve problems such as cross-interference
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Embodiment 1
[0065] This example describes the synthesis of poly(2,2'-disulfo-4,4'-biphenylterephthalamide) cesium salt (structure 3 in Table 2).
[0066] Mix 1.377 g (0.004 mol) of 4,4'-diaminobiphenyl-2,2'-disulfonic acid with 1.2 g (0.008 mol) of cesium hydroxide and 40 ml of water and stir with a disperser until dissolve. To the solution was added 0.672 g (0.008 mol) of sodium bicarbonate and stirred. While stirring the resulting solution at high speed (2500 rpm), a solution of 0.812 g (0.004 mol) of terephthaloyl dichloride in dry toluene (15 mL) was gradually added within 5 minutes. Stirring was continued for 5 minutes and a viscous white emulsion formed. The emulsion was then diluted with 40ml of water and the stirring speed was reduced to 100rpm. After homogenization of the reaction mass, the polymer was precipitated by adding 250 ml of acetone. The fibrous precipitate was filtered and dried.
[0067] The sample was analyzed by gel permeation chromatography (GPC) with a Hewlet...
Embodiment 2
[0069] This example describes the synthesis of poly(2,2'-disulfo-4,4'-biphenylsulfoterephthalamide) (structure 4 in Table 2).
[0070] In a 500ml three-necked flask, dissolve 10g (40mmol) of 2-sulfoterephthalic acid, 27.5g (88.7mmol) of triphenylphosphine, 20g of lithium chloride and 50ml of pyridine in 200ml of N-methyl In base pyrrolidone. The mixture was stirred at 40° C. for 15 minutes, then 13.77 g (40 mmol) of 4,4′-diaminobiphenyl-2,2′-disulfonic acid were added. The reaction mixture was stirred at 115°C for 3 hours. To the viscous solution was added 1L of methanol, filtered and the resulting yellow precipitate washed successively with methanol (500ml) and diethyl ether (500ml). The yellow solid was dried under vacuum at 80 °C overnight. Samples were analyzed for molecular weight by GPC as described in Example 1.
Embodiment 3
[0072] This example describes the synthesis of poly(p-phenylenesulfoterephthalamide) (structure 5 in Table 2).
[0073] In a 500ml three-necked flask, dissolve 10g (40mmol) of 2-sulfoterephthalic acid, 27.5g (88.7mmol) of triphenylphosphine, 20g of lithium chloride and 50ml of pyridine in 200ml of N-methyl In base pyrrolidone. The mixture was stirred at 40° C. for 5 minutes, followed by the addition of 4.35 g (40 mmol) of 1,4-phenylenediamine. The reaction mixture was stirred at 115°C for 3 hours. 1 L of methanol was added to the viscous solution, filtered and the resulting yellow precipitate washed successively with methanol (500ml) and diethyl ether (500ml). The yellow solid was dried under vacuum at 80 °C overnight. Samples were analyzed for molecular weight by GPC as described in Example 1.
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