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Polyethylene glycol magnesium and preparation method and application thereof

A polyethylene glycol, scheme technology, applied in the field of polyethylene glycol magnesium and its preparation, can solve the problems of lack of reach, polyester influence, expensive price, etc.

Inactive Publication Date: 2012-06-13
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the problem is that the amount of nucleating accelerator and nucleating agent is more, generally 1-15% and 1-10%, if the amount is small, the effect of promoting crystallization will not be achieved, which is not feasible in actual industry Yes, the cost is too high
In the patent CN1041962A, it is mentioned that ionomers, sodium carboxylic acid salts, polypropylene, and acid anhydrides are used as nucleating agents in polyester, and fatty acid sulfonamide and triphenyl phosphite crystallization accelerators are used. Nucleating agents can Choosing one or several of them can significantly improve the crystallization performance of polyester, but the ionomer is currently more expensive, and the added crystallization accelerators are all acids, which will cause negative effects on polyester. Impact

Method used

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  • Polyethylene glycol magnesium and preparation method and application thereof
  • Polyethylene glycol magnesium and preparation method and application thereof
  • Polyethylene glycol magnesium and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0024] After mixing polyethylene glycol with a number average molecular weight of 200 and magnesium oxide in a molar ratio of 3:1, they are heated to react, and the reaction temperature is controlled at 160°C. Condensation and reflux are used to continuously remove the water vapor generated in the reaction process to promote the formation of the product; after 8 hours of reaction, the residual moisture and excess polyethylene glycol in the reactant solution are removed by vacuum decompression distillation, and the vacuum The temperature is controlled at -0.06MPa; after vacuum distillation for 2 hours, the final product is taken out for cooling, crystallized at room temperature and suction filtered, and then the crystal product is washed with absolute ethanol and placed in a vacuum oven at a temperature of 80°C It is dried in a vacuum chamber with a vacuum degree of -0.01MPa, and finally white crystalline particles are obtained, which is the product polyethylene glycol magnesium...

Embodiment 2

[0027] After mixing polyethylene glycol with a number average molecular weight of 200 and magnesium hydroxide in a molar ratio of 3:1, they are heated to react, and the reaction temperature is controlled at 160°C. Condensation and reflux are used to continuously remove the water vapor generated in the reaction process to promote the formation of the product; after 8 hours of reaction, the residual moisture and excess polyethylene glycol in the reactant solution are removed by vacuum decompression distillation, and the vacuum The temperature is controlled at -0.06MPa; after vacuum distillation for 2 hours, the final product is taken out for cooling, crystallized at room temperature and suction filtered, and then the crystal product is washed with absolute ethanol and placed in a vacuum oven at a temperature of 80°C It is dried in a vacuum chamber with a vacuum degree of -0.01MPa, and finally white crystalline particles are obtained, which is the product polyethylene glycol magne...

Embodiment 3

[0030] After mixing polyethylene glycol with a number average molecular weight of 400 and magnesium oxide at a molar ratio of 5:1, they are heated to react, and the reaction temperature is controlled at 170°C. Condensation and reflux are used to continuously remove the water vapor generated during the reaction to promote the formation of the product; after 9 hours of reaction, vacuum distillation is used to remove the residual moisture and excess polyethylene glycol in the reactant solution. The temperature is controlled at -0.07MPa; after vacuum distillation for 3 hours, the final product is taken out for cooling, crystallized at room temperature and suction filtered, and then the crystal product is washed with absolute ethanol and placed in a vacuum oven at a temperature of 80°C It is dried in the middle, and the vacuum degree is controlled at -0.02MPa, and finally white crystalline particles are obtained, which is the product polyethylene glycol magnesium. The obtained poly...

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Abstract

The invention relates to polyethylene glycol magnesium and a preparation method and application thereof. The chemical structure of the polyethylene glycol magnesium is shown in the specification. The preparation method for the polyethylene glycol magnesium comprises the following steps of: mixing polyethylene glycol and magnesium, heating and carrying out a reaction on the mixture, and continuously removing steam produced during the reaction to promote the generation of products; and removing residual water and residual polyethylene glycol from a reactant solution by using a vacuum pressure-reduction distillation process, taking a final product out and cooling, crystallizing at room temperature and leaching, washing and drying, and finally obtaining white crystalline particles which are the polyethylene glycol magnesium. A polyethylene terephthalate (PET) nucleating agent is provided, and is smelted and mixed with PET during squeezing of a screw, so that the flexibility of a PET chain section is improved, and the glass transition temperature and the cold crystallization temperature of the PET are reduced; furthermore, the dispersion activation capacity of the PET chain section is reduced, so that the PET chain section does dispersive motion towards the surface of a crystal nucleus, and is arranged neatly; and therefore, a function of accelerating the PET crystallization rate is realized.

Description

technical field [0001] The present invention relates to a kind of polyethylene terephthalate (PET) nucleating agent and its preparation and application, particularly relate to polyethylene glycol magnesium and its preparation method and application, specifically refer to polyethylene glycol magnesium can be in As a nucleating agent in PET, it can effectively improve the crystallization rate and nucleation effect of PET. Background technique [0002] Polyethylene terephthalate (PET) is a semi-crystalline polymer with high melting temperature (Tm) and glass transition temperature (Tg). Because PET can maintain excellent physical properties in a wide temperature range, especially its fatigue resistance, friction resistance, aging resistance and electrical insulation properties are very excellent, and it can resist most organic solvents and inorganic acids Stable and very cheap, it is widely used in the fields of synthetic fibers, films, packaging bottles, medicine and daily ne...

Claims

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Application Information

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IPC IPC(8): C07C43/11C07C41/26C08G65/48C08L71/08C08L67/02
Inventor 尹娜王华平李文刚王朝生陈仕艳欧阳炀
Owner DONGHUA UNIV
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