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A high stability polymer complex and its preparation method

A high-stability, polymer technology, applied in the field of polymer materials, can solve the problems of material performance decline, harm to human health, poor thermal stability, etc., and achieve the effect of improved strength, excellent mechanical properties, and improved thermal stability.

Active Publication Date: 2017-04-12
杭州虹舞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to its special molecular structure, its thermal stability is poor, and it will degrade during melt processing, thereby producing a large amount of formaldehyde gas, which not only pollutes the environment and endangers human health, but is also easily oxidized to formic acid, which leads to the occurrence of polyoxymethylene. Acid hydrolysis, which further reduces the performance of the material

Method used

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  • A high stability polymer complex and its preparation method
  • A high stability polymer complex and its preparation method
  • A high stability polymer complex and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0034] Add 1 g of PEG-PPG-PEG with a molecular weight of 2800 to 5 g of β-cyclodextrin aqueous solution at 40 ° C, cool to room temperature, and leave it to stand overnight after ultrasonic treatment to produce a white precipitate, which can be obtained after separation. Cyclodextrin inclusion complex-1.

Embodiment 1-2

[0036] Add 1 g of PEG-PPG-PEG with a molecular weight of 2900 to 6 g of β-cyclodextrin aqueous solution at 50 ° C, cool to room temperature, and leave it to stand overnight after ultrasonic treatment to produce a white precipitate, which can be obtained after separation. Cyclodextrin inclusion complex-2.

Embodiment 1-3

[0038] Add 1 g of PEG-PPG-PEG with a molecular weight of 5800 to 7 g of β-cyclodextrin aqueous solution at 60°C, cool to room temperature, and leave it to stand overnight after ultrasonic treatment to produce a white precipitate, which can be obtained after separation. Cyclodextrin inclusion complex-3.

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Abstract

The invention discloses a polymer composite with high stability and a preparation method of the polymer composite. The composite is a blend of polyformaldehyde and a cyclodextrin inclusion compound in a mass ratio of 100:0.5-2. The preparation method comprises the following steps: adding the dried polyformaldehyde and cyclodextrin inclusion compound in the mass ratio of 100:0.5-2 into a melt-mixing device; performing melt-mixing at the temperature of 180-200 DEG C to obtain a mixture; discharging the mixture from the melt-mixing device, and reducing the temperature to reach normal temperature and crystallizing to obtain the polyformaldehyde composite with high heat stability. According to the polyformaldehyde composite, the heat stability of polyformaldehyde is greatly improved, and the high mechanical property of the material is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a high-stable polymer compound and a preparation method thereof, in particular to a cyclodextrin inclusion compound which has both high thermal stability and excellent mechanical properties. Polyoxymethylene compound and its preparation method. Background technique [0002] Polyoxymethylene (POM) is widely used because of its excellent comprehensive properties. Its main advantages include high strength, good rigidity, high hardness, excellent solvent resistance and corrosion resistance, and good molding performance, so it is very ideal. One of engineering plastics. However, due to its special molecular structure, its thermal stability is poor, and it will be degraded during melt processing, thereby producing a large amount of formaldehyde gas, which not only pollutes the environment, endangers human health, but is easily oxidized to formic acid, and leads to the occurren...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/00C08L5/16C08L71/02
Inventor 李剑春赵黎
Owner 杭州虹舞科技有限公司
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