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Linear temperature-sensitive polyurethane and preparation method thereof

A polyurethane and temperature-sensitive technology, applied in the field of linear temperature-sensitive polyurethane and its preparation, can solve the problems of complex synthesis method and high production cost, and achieve the effects of simple synthesis method, cost saving and good temperature-sensitive effect.

Active Publication Date: 2017-05-24
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The temperature-sensitive polyurethane with N-isopropylacrylamide polymer as the temperature-sensitive segment has good temperature-sensitive properties and broad application prospects, but its synthesis method is mainly chemical grafting, that is, to synthesize the polyurethane segment and Poly N-isopropylacrylamide chain forging, and then use the latter to chemically graft the former, the synthesis method is relatively complicated, and the production cost is high

Method used

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  • Linear temperature-sensitive polyurethane and preparation method thereof
  • Linear temperature-sensitive polyurethane and preparation method thereof
  • Linear temperature-sensitive polyurethane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of linear thermosensitive polyurethane, its preparation method is as follows:

[0026] S1. In a 100mL two-necked bottle, add 0.02mol (2.2632g) N-isopropylacrylamide, 0.02mol (1.2217g) ethanolamine, 2 1. Under the condition of 65°C and magnetic stirring for 36 hours, the monomer molecule M containing a hydroxyl group and having a temperature-sensitive effect can be obtained.

[0027] S2. Polycarbonate diol (PCDL-1000, indicating a molecular weight of 1000) was dewatered in a vacuum at -0.095MPa and 130°C for 2 hours, and set aside. Equipped with a condensing reflux device, a mechanical stirrer and a N 2 0.006mol (6g) PCDL-1000, 0.004mol (0.5365g) dimethylolpropionic acid (DMPA), 10mL N-methylpyrrolidone and 40mL acetone were added to a 250mL four-necked flask after dehydration treatment, and at 75°C Stir evenly under the conditions, then add 0.012mol (2.0183g) hexamethylene diisocyanate (HDI) and 0.0005mol (0.3g) catalyst dilaurate and butyltin, at this time NCO...

Embodiment 2

[0029] A kind of linear thermosensitive polyurethane, its preparation method is as follows:

[0030] S1. In a 100mL two-necked bottle, add 0.02mol (2.2632g) N-isopropylacrylamide, 0.02mol (1.2217g) ethanolamine, 2 1. Under the condition of 65°C and magnetic stirring for 36 hours, the monomer molecule M containing a hydroxyl group and having a temperature-sensitive effect can be obtained.

[0031] S2. Polycarbonate diol (PCDL-2000) was dehydrated under vacuum at -0.095MPa and 130°C for 2 hours, and set aside. Equipped with a condensing reflux device, a mechanical stirrer and a N 2 0.0056mol (11.2g) PCDL-2000, 0.004mol (0.5365g) dimethylolpropionic acid (DMPA), 10mL N-methylpyrrolidone and 30mL acetone were added to the 250mL four-necked bottle after dehydration treatment, and at 75 Stir evenly under the condition of ℃, then add 0.016mol (2.6911g) hexamethylene diisocyanate (HDI) and 0.0005mol (0.3g) catalyst dilaurate and butyltin, at this time NCO / OH=1.67:1. After reacting ...

Embodiment 3

[0033] A kind of linear thermosensitive polyurethane, its preparation method is as follows:

[0034] S1. In a 100mL two-necked bottle, add 0.02mol (2.2632g) N-isopropylacrylamide, 0.02mol (1.2217g) ethanolamine, 2 1. Under the condition of 65°C and magnetic stirring for 36 hours, the monomer molecule M containing a hydroxyl group and having a temperature-sensitive effect can be obtained.

[0035] S2. Polycarbonate diol (PCDL-500) was dewatered under vacuum at -0.095MPa and 130°C for 2 hours, and set aside. Equipped with a condensing reflux device, a mechanical stirrer and a N 2 0.0064mol (3.2g) PCDL-500, 0.004mol (0.5365g) dimethylolpropionic acid (DMPA), 10mL N-methylpyrrolidone and 40mL acetone were added to the 250mL four-necked bottle after dehydration treatment, at 75 Stir evenly under the condition of ℃, then add 0.012mol (2.0183g) hexamethylene diisocyanate (HDI) and 0.0005mol (0.3g) catalyst dilaurate and butyltin, at this time NCO / OH=1.15:1. After reacting for 3 ho...

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Abstract

The invention relates to the field of high polymer functional materials, in particular to a linear temperature-sensitive polyurethane and a preparation method thereof. The preparation method includes: S1. preparing a primary hydroxyl group-containing monomer molecule M with temperature-sensitive effect from N-isopropylacrylamide and ethanolamine; S2. subjecting polycarbonate diol, dimethylolpropionic acid, hexamethylene diisocyanate and a catalyst to reaction to generate polyurethane, then adding the monomer molecule M synthesized in S1 to cap two ends of the obtained polyurethane, finally adding triethylamine and deionized water, and carrying out vacuum rotary evaporateion to remove the organic solvent, thus obtaining the linear temperature-sensitive polyurethane. According to the temperature-sensitive polyurethane provided by the invention, the monomer molecule M plays a temperature-sensitive role, two ends of the polyurethane chain segment are directly capped by the monomer molecule M, and no other chain segment is contained. The synthesis method is simple, omits the poly(N-isopropylacrylamide) chain segment synthesis and chemical grafting steps, also saves the synthesis raw materials, and reduces the cost.

Description

technical field [0001] The invention relates to the field of polymer functional materials, in particular to a linear temperature-sensitive polyurethane and a preparation method thereof. Background technique [0002] Temperature-sensitive polyurethane combines the excellent mechanical properties of polyurethane (PU) with the temperature sensitivity of temperature-sensitive substances, and has the advantages of good water solubility, low environmental pollution, good viscosity, high strength and wear resistance. In addition, it also has the characteristics of intelligent temperature stimulus responsiveness and shape memory effect, and has been widely used in coatings and biomaterials in recent years. [0003] At this stage, whether it is a physical blending method or a chemical grafting method, the molecule of the synthesized temperature-sensitive polyurethane is structurally divided into two parts, one part is a polyurethane segment, and the other is a polymer chain with temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/73C08G18/66C08G18/44C08G18/34C08G18/32C08G18/12
CPCC08G18/0823C08G18/12C08G18/44C08G18/6659C08G18/73C08G18/3825
Inventor 徐祖顺张博晓熊雨轩袁天梦田军邱少稳李庚茜
Owner HUBEI UNIV
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