A high-strength humidity-responsive polyhydroxyamide and its preparation method

A technology of polyhydroxyamide and humidity response, which is applied in the field of high-strength humidity-responsive polyhydroxyamide and its preparation, can solve the problems of reduced mechanical properties, achieve the effects of improved toughness, no pollution to the environment, and wide application prospects

Active Publication Date: 2019-10-08
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of humidity-responsive materials, but most of them generally lose their mechanical properties after absorbing moisture.

Method used

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  • A high-strength humidity-responsive polyhydroxyamide and its preparation method
  • A high-strength humidity-responsive polyhydroxyamide and its preparation method
  • A high-strength humidity-responsive polyhydroxyamide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation of embodiment 1 polyhydroxyamide 1

[0039] Prepare polyhydroxyamide 1 as follows: Take 9.5 g of dimethyl sebacate and 3.7 g of 1,3-diamino-2-propanol and mix them uniformly at 70°C, add 250 μL of sodium methoxide solution (concentration: 5 mol / L), and seal for 70 ℃ heating for 12h. Connect the water pump to evacuate and heat to 100°C to react for 2 hours until there is no liquid in the reaction system (because the reaction raw material is liquid, the reaction by-product methanol is also liquid, but the target product is solid at this temperature), replace the water pump with an oil pump Vacuumize and heat to 150°C for 1 hour, and finally heat to 220°C for 1 hour with oil pump vacuum. After the reaction, the product was taken out and sealed for preservation.

[0040] Such as figure 2 Shown: after the raw material dimethyl sebacate of the present invention is reacted according to Example 1, the peak of the ester group basically disappears, and the pea...

Embodiment 2

[0041] The preparation of embodiment 2 polyhydroxyamide 2

[0042] Prepare polyhydroxyamide 2 as follows: Take 3.5 g of dimethyl adipate and 1.9 g of 1,3-diamino-2-propanol and mix them uniformly at 70°C, add 130 μL of sodium methoxide solution (concentration: 5 mol / L), and seal for 70 ℃ heating 10h. Connect the water pump to evacuate and heat to 100°C for 1.5h until there is no liquid in the reaction system, replace the water pump with an oil pump to evacuate and heat to 150°C for 0.9h, and finally heat to 220°C for 0.8h with the oil pump. After the reaction, the product was taken out and sealed for preservation.

[0043] Such as Figure 6 Shown: after the raw material dimethyl adipate of the present invention is reacted according to Example 2, the peak of the ester group basically disappears, and the peak of the amide group is newly generated, which means that the reaction is successful, and the ester is basically converted into an amide group. At the same time, there are...

Embodiment 3

[0044] The preparation of embodiment 3 polyhydroxyamide 3

[0045] Prepare polyhydroxyamide 3 as follows: Take 13.5 g of dimethyl malonate and 9.3 g of 1,3-diamino-2-propanol and mix them uniformly at 70°C, add 650 μL of sodium methoxide solution (concentration: 5 mol / L), and seal for 70 ℃ heating 10h. Connect the water pump to evacuate and heat to 100°C for 1 hour until there is no liquid in the reaction system, replace the water pump with an oil pump to evacuate and heat to 150°C for 0.8 hour, and finally heat to 220°C for 1 hour by oil pump. After the reaction, the product was taken out and sealed for preservation.

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Abstract

The invention relates to high-strength and high-humidity-response poly-oxyamide and a preparation method thereof. The preparation method of poly-oxyamide comprises the steps that a dimethyl compound and an alcohol amine compound are heated, dissolved and evenly stirred to form a reaction solution; a basic catalyst is added to the reaction solution, sealed and heated at 68-72 DEG C, and a reactionis conducted for 2-24 h; then a reaction system is heated to 95-105 DEG C, and a vacuum pumping reaction is conducted through a water pump for 1-3 hours; then the reaction system is heated to 145-155DEG C, and a vacuum pumping reaction is conducted through an oil pump for 0.5-1.5 hours; finally, the reaction system is heated to 210-230 DEG C, a vacuum pumping reaction is conducted through the oilpump for 0.5-1.5 hours, and poly-oxyamide is obtained. The prepared poly-oxyamide has high strength of polyamide and the humidity response at the same time, the toughness after water absorption is greatly improved, and accordingly poly-oxyamide has wider application prospects on functional materials.

Description

technical field [0001] The invention belongs to the field of functional polyamide materials, and in particular relates to a high-strength humidity-responsive polyhydroxyamide and a preparation method thereof. Background technique [0002] Polyamide is a polymer with repeating amide groups on the molecular chain, commonly known as nylon. Due to its excellent thermal and mechanical properties, it is widely used in various fields of life. With the advancement of technology, functional polyamides have become one of the most important and hottest research fields. At present, scientists have prepared various functional polyamides, such as: aromatic polyamides, flame-retardant polyamides, hyperbranched polyamides, soluble polyamides, polyamideimides, polyhydroxyamides and other polymer materials. Among them, polyhydroxyamide has been extensively studied due to its unique properties. [0003] At present, the preparation of polyhydroxyamide is mainly obtained by condensation polym...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28
Inventor 汪钟凯周江骏王宝霞
Owner ANHUI AGRICULTURAL UNIVERSITY
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