Polymer, solid-solid phase change material, preparation method and use
A technology of phase change material and reaction vessel, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of unfavorable use of phase change materials, large difference between melting temperature and crystallization temperature of polyethylene glycol blocks, etc.
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Embodiment 1
[0083] Nitrogen gas was passed into the reaction vessel for 20 min, and the air in the reaction vessel was exhausted. 95 wt% cetyl acrylate and 1 wt% azobisisobutyronitrile (based on the total weight of cetyl acrylate and allyl glycidyl ether) were added to the reaction vessel. Under nitrogen protection and stirring, the temperature was raised to 65° C., and after the reaction materials were fully melted, 5 wt % allyl glycidyl ether was added. After the temperature was stabilized to 65° C., 0.5 wt % dodecyl mercaptan (based on the total weight of cetyl acrylate and allyl glycidyl ether) was added and reacted for 4 h. The reaction temperature was raised to 180° C., and the reaction was continued for 4 hours to obtain polyhexadecyl acrylate-allyl glycidyl ether. Infrared spectrum and NMR spectrum see figure 1 and image 3 . The NMR spectrum of allyl glycidyl ether can be found in figure 2 .
[0084] Polyhexadecyl acrylate-allyl glycidyl ether was fully melted at 60°C, mix...
Embodiment 2
[0087] Nitrogen gas was passed into the reaction vessel for 20 min, and the air in the reaction vessel was exhausted. 90 wt% stearyl acrylate and 1 wt% azobisisobutyronitrile (based on the total weight of stearyl acrylate and allyl glycidyl ether) were added to the reaction vessel. Under nitrogen protection and stirring, the temperature was raised to 65° C., and after the reaction materials were fully melted, 10 wt % allyl glycidyl ether was added. After the temperature was stabilized to 65° C., 0.5 wt % dodecyl mercaptan (based on the total weight of stearyl acrylate and allyl glycidyl ether) was added and reacted for 4 h. The reaction temperature was raised to 180° C., and the reaction was continued for 4 hours to obtain polyoctadecyl acrylate-allyl glycidyl ether pHA.
[0088] Mix polyoctadecyl acrylate-allyl glycidyl ether with polyether amine D230 (the amount is 15wt% of allyl glycidyl ester) and heat treat at 60°C for 8 hours to obtain solid-solid phase change material ...
Embodiment 3
[0091] Nitrogen gas was passed into the reaction vessel for 20 min, and the air in the reaction vessel was exhausted. 40wt% myristyl acrylate, 40wt% behenyl acrylate and 1wt% azobisisobutyronitrile (based on myristyl acrylate, behenyl acrylate and glycidyl acrylate total weight) into the reaction vessel. Under nitrogen protection and stirring, the temperature was raised to 65° C., and after the reaction materials were fully melted, 20 wt % glycidyl acrylate was added. After the temperature stabilized to 65° C., 0.5 wt % dodecyl mercaptan (based on the total weight of myristyl acrylate, behenyl acrylate and glycidyl acrylate) was added and reacted for 4 hours. The reaction temperature was raised to 180° C., and the reaction was continued for 4 hours to obtain a copolymer.
[0092] The copolymer and ethylene glycol (the amount used is 10 wt% of the glycidyl acrylate) were uniformly mixed, and heat-treated at 60° C. for 7 hours to obtain a solid-solid phase change material.
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