Method for preparing phase change thermal insulation polyurethane resin

A polyurethane resin and phase change technology, applied in the field of preparation of functional polymer materials, can solve problems such as poor mechanical properties, and achieve the effects of excellent phase change thermal insulation performance, good mechanical properties and environmental responsiveness

Inactive Publication Date: 2010-11-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Hu Jinlian et al. reported in Solar Energy Material & Solar Cells92 (2008) 1245-1252 that polyethylene glycol with a molecular weight of 3400 was used as the soft segment, and 4,4'-diphenylmethane diisocyanate and 1,4-butanediol were used as the soft segment. For the hard segment, a phase-change thermal insulation polyurethane resin was synthesized by bulk polymerization. The phase-change enthalpy of the resin can reach 100J / g, but its mechanical properties are poor. At 100% elongation, the tensile strength is less than 0.8MPa

Method used

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  • Method for preparing phase change thermal insulation polyurethane resin
  • Method for preparing phase change thermal insulation polyurethane resin
  • Method for preparing phase change thermal insulation polyurethane resin

Examples

Experimental program
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Embodiment 1

[0027] Embodiment 1 (chain extender is 1,4-dihydroxyethyl-3-methylureidopyrimidinone)

[0028] 20g of dehydrated polyethylene glycol with a molecular weight of 10000 was dissolved in 60ml of N,N-dimethylformamide, 0.672g of 1,6-hexamethylene diisocyanate and 0.05g of dibutyltin dilaurate were mixed in the reactor After uniformity, pre-polymerize at 80°C for 3 hours under the protection of nitrogen; then add 0.512g of the previously synthesized chain extender 1,4-dihydroxyethyl-3-methylureidopyrimidinone, and continue to expand at 80°C under the protection of nitrogen. chain reaction for 5 hours, then poured into a mold, placed in a blast oven at 70°C for 12 hours to remove the organic solvent, and obtained a phase-change thermal insulation polyurethane resin.

[0029] The infrared spectrum of the phase-change thermal insulation polyurethane resin is as follows: figure 1 shown, from figure 1 It can be seen that the polyurethane prepolymer has been successfully chain-extended ...

Embodiment 2

[0032] Embodiment 2 (chain extender is 1-aminohexyl-3-methyl-4-aminoethylureidopyrimidinone)

[0033] 20g of dehydrated polyethylene glycol with a molecular weight of 10000 was dissolved in 60ml of N,N-dimethylformamide, 0.672g of 1,6-hexamethylene diisocyanate and 0.05g of dibutyltin dilaurate were mixed in the reactor After uniformity, pre-polymerize at 80°C for 3 hours under the protection of nitrogen; then add 0.508g of the previously synthesized chain extender 1-aminohexyl-3-methyl-4-aminoethylureidopyrimidinone, and still under the protection of nitrogen for 80 ℃ chain extension reaction for 5 hours, then poured into a mold, and placed in a blast oven at 70 ℃ for 12 hours to remove the organic solvent to obtain a phase-change thermal insulation polyurethane resin.

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Abstract

The invention discloses a method for preparing phase change thermal insulation polyurethane resin. In the method, polyethylene glycol is adopted as a soft segment, polyisocyanate and quadruple hydrogen bond ureido pyrimidone motif-containing chain extender are adopted as a hard segment, and the quadruple hydrogen bond-containing phase change thermal insulation polyurethane resin is synthesized. The resin has excellent phase change thermal insulation performance, and quadruple hydrogen bonds can be self-assembled into a supermolecular structure to endow good mechanical properties and environmental responsiveness to the resin. The resin has the enthalpy of phase change of 150J/g, the breaking strength of 8MPa, and the elongation at break of 367 percent; and under the same conditions, compared with the polyurethane resin synthesized by a chain extender not containing the quadruple hydrogen bond ureido pyrimidone motif, the phase change thermal insulation polyurethane resin has the advantage of obviously improving the mechanical properties.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material, in particular to a preparation method of a phase-change thermal insulation polyurethane resin. Background technique [0002] Phase change materials are substances that use the endothermic and exothermic effects of substances during the phase change process to store heat and regulate temperature. It undergoes a phase change process through the induction of the temperature of the external environment, resulting in endothermic or exothermic phenomena. Polymer solid-solid phase change materials are solid before and after the phase change, no liquid is produced, the volume change is small, there is no need to consider the problem of container packaging, and it has many excellent properties such as non-toxic, non-corrosive, and easy to process and shape. Research hotspots of phase change energy storage materials. [0003] Polyethylene glycol has a simple molecular chain structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08G18/10C09K5/02
Inventor 龚园园郑震冯志成顾隽王新灵
Owner SHANGHAI JIAO TONG UNIV
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