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Environmentally responsive comb type polycondensate and preparation thereof

An environment-responsive, polycondensate technology, applied in the field of environment-responsive comb-type polycondensate and its preparation, comb-type polycondensate and its preparation field, can solve the problems of single conditions for inducing phase transition, complex industrial production process, etc. Wide application value, sensitive responsiveness, and the effect of rich response conditions

Inactive Publication Date: 2008-11-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industrial production process of this product is relatively complicated, and it is necessary to carry out oxypropylation of polyoxyethylene or oxyethylation of polyoxypropylene under the action of an alkali catalyst; at the same time, this copolymer is used as an environmental responsive material. When used, it only has sensitive response to temperature, etc., and the conditions for inducing phase transition are relatively simple

Method used

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  • Environmentally responsive comb type polycondensate and preparation thereof
  • Environmentally responsive comb type polycondensate and preparation thereof
  • Environmentally responsive comb type polycondensate and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] With stirring, in the reflux condenser flask, add the polyoxypropylene (molecular weight 640g·mol) containing double epoxy functional group -1 ) 5.12g, piperazine 0.52g and L100 (SURFONAMINE amine series product of Huntsman company) 2.10g, then add 15ml ethanol to dissolve the reactant. Under the condition of flowing nitrogen, the reaction was refluxed for 10 hours. After the reaction, ethanol was removed to obtain the target product.

[0019] figure 1 It is the infrared spectrum of the environment-responsive comb polycondensate, measured by the KBr salt flake method. 3448cm in the picture -1 At the absorption peak of hydroxyl group, 2872cm -1 The place is the C-H vibration absorption peak, 1374cm -1 The place is the methyl symmetrical deformation vibration absorption peak, 1110cm -1 At the C-O-C asymmetric stretching vibration absorption peak, 840cm -1 is the CH2O-deformation vibration absorption peak.

[0020] figure 2 for multiple environment-responsive com...

Embodiment 2

[0022] With stirring, in the reflux condenser flask, add the polyoxypropylene (molecular weight 640g·mol) containing double epoxy functional group -1 ) 6.40g, piperazine 0.75g and L300 (SURFONAMINE amine series product of Huntsman company) 3.96g, then add 17ml chloroform to dissolve the reactant. Under nitrogen, the reaction was refluxed for 11 hours. After the reaction, the trichloromethane was removed to obtain the target product.

Embodiment 3

[0024] With stirring, in the reflux condenser flask, add polyoxypropylene (molecular weight 380g·mol) containing double epoxy functional group -1 ) 1.90g, piperazine 0.21g and B100 (SURFONAMINE amine series product of Huntsman company) 2.63g, then add 12ml methanol to dissolve the reactant. Under nitrogen, the reaction was refluxed for 12 hours. After the reaction, methanol was removed to obtain the target product.

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Abstract

The invention relates to an environmental response comb-type polycondensate and a preparation method thereof. By adopting simple condensation polymerization method, copolycondensation is carried out to the polyoxyethylene with double oxygen-containing functional group or polyoxypropylene and piperazine and primary amine with long line to prepare comb-type polycondensate. The preparation method is simple and the raw materials are easy to obtain. Only solvents with low toxicity can be used as reaction medium in the reaction process, at the same time, no small molecular side product is generated during the reaction process, thus the post treatment of the product is very easy with high purity. The product obtained not only responses to temperature but also sensitively responses to pH values. At the same time, the phase inversion temperature of the polymer can be controlled by adjusting the composition of the polycondensate. As the extension to polyoxyethylene polyoxypropylene copolymer, the polycondensate not only can be applied to original applicable range of the polyoxyethylene polyoxypropylene copolymer, but also to a wider research and pracitical applying field since the polymer has richer environmental response conditions.

Description

technical field [0001] The invention relates to an environment-responsive comb polycondensate and a preparation method thereof, in particular to a comb polycondensate which is responsive to temperature and pH value and a preparation method thereof. The invention belongs to the technical field of chemical polymer material preparation. Background technique [0002] Environment-responsive polymers are a class of polymers that can respond to subtle changes (stimuli) in the external environment, resulting in corresponding changes in physical structure and chemical properties or even mutations. External stimuli can be temperature, pH, ionic strength ( Electrolyte), electric field, light, etc. Environmentally responsive polymers have a wide range of applications, such as sensors, actuators, smart switches, drivers, displays, optical communications, drug carriers, biocatalysis, immobilized enzymes, material extraction, cell culture, smart catalysts, smart fabrics, Intelligent dimm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/333C08G73/06C08G73/02
Inventor 任艳蓉姜学松印杰
Owner SHANGHAI JIAO TONG UNIV
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