A kind of thermochromic polymer material and its application
A polymer material and thermochromic technology, applied in applications, heat-sensitive coatings, household appliances, etc., can solve problems such as insufficient thermal stability, achieve excellent thermochromic performance, excellent thermal stability, and easy to use in large areas The effect of promotion
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Embodiment 1
[0059] This example provides a thermochromic polymer material B-1-1, and the synthesis route of B-1-1 is as follows:
[0060]
[0061] ;
[0062] The preparation method of B-1-1 specifically comprises the following steps:
[0063] 1) Dissolve 148 g (1mol) phthalic anhydride and 137 g (1mol) 3-dimethylaminophenol in 1000 mL toluene, heat to reflux for 4 h under nitrogen, then add 300 mL 10 mol / L sodium hydroxide dropwise The solution was then heated at 100°C for 8 hours. After the reaction, the reaction mixture was poured into ice water, neutralized with hydrochloric acid, extracted with chloroform, the organic phases were combined, dried with anhydrous sodium sulfate, concentrated to remove the solvent to obtain a crude product, which was recrystallized with dichloromethane / petroleum ether to obtain 2-(4-Dimethylamino-2-hydroxybenzoyl)-benzoic acid (x-3) 245 g.
[0064] Compound x-3 NMR data: 1 H NMR (500 MHz, CDCl 3 ) δ 8.43 (dd, J = 14.8, 3.1Hz, 1H), 8.18 (dd, ...
Embodiment 2
[0080] This example provides a thermochromic polymer material B-2-1, the synthesis route of which is as follows:
[0081] ;
[0082] The preparation method of B-2-1 specifically comprises the following steps:
[0083] 8.7 g (10 mmol) of borate intermediate X-12 and 2.8 g (10 mmol) of 2,6-dibromonaphthalene (2-1) were dissolved in 50 mL of toluene, and 10 mL of 2 mol / L potassium carbonate was added Aqueous solution, blown with nitrogen for 30 min, added 0.12 g (0.1 mmol) Pd(PPh3) 4 , heated to reflux and stirred for 24 h under a nitrogen atmosphere. After the reaction was completed, it was added to 100 mL of methanol solution to precipitate a solid, which was extracted with chloroform to obtain the target polymer B-2-1.
[0084] B-2-1 NMR data: 1 H NMR (300 MHz, CDCl 3 ) δ 8.22 (d, J = 15.0 Hz, 1H),8.04 – 7.69 (m, 8H), 7.60 – 7.25 (m, 10H), 7.23 – 7.07 (m, 2H), 6.98 (m, 2H),6.42 (m, 1H), 6.27 ( d, J = 2.9 Hz, 1H), 4.29 (m, 4H), 3.50 – 3.22 (m, 4H), 2.25 (m, 2H), 1.12...
Embodiment 3
[0086] This example provides a thermochromic polymer material B-3-1, the synthesis route of which is as follows:
[0087] ;
[0088] The preparation method of B-3-1 specifically comprises the following steps:
[0089] 8.7 g (10 mmol) of borate intermediate X-12 and 3.3 g (10 mmol) of 2,5-dibromo-3-hexylthiophene (3-1) were dissolved in 50 mL of toluene, and 10 mL of 2 mol / L of potassium carbonate aqueous solution, blown with nitrogen for 30 min, added 0.12 g (0.1 mmol) Pd(PPh3) 4 , heated under reflux and stirred for 24 h under a nitrogen atmosphere. After the reaction was completed, it was added to 100 mL of methanol solution to precipitate a solid, which was extracted with chloroform to obtain the target polymer B-3-1.
[0090] B-3-1 NMR data: 1 H NMR (300 MHz, CDCl 3 ) δ 8.32 – 8.06 (m, 2H), 8.00 –7.66 (m, 3H), 7.60 – 6.80 (m, 13H), 6.51 – 6.14 (m, 2H), 4.29 (t, J = 9.9 Hz,4H), 3.50 – 3.22 (m, 4H), 2.68 (m, 2H), 2.25 (m, 2H), 1.69 – 0.75 (m, 17H).
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