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Aromatic copolyester and preparation method thereof

An aromatic copolyester and ester compound technology, applied in the polymer field, can solve the problems affecting the use range and safety of products, limiting the application range of PET materials, and products prone to bending deformation, etc., to reduce bending deformation and mechanical properties. Excellent, long service life effect

Active Publication Date: 2020-01-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the toughness of plastic parts in the injection molding process of traditional PET is insufficient, resulting in high brittleness and easy cracking of processed products, which affects the range of use and safety of products
Moreover, the glass transition temperature (Tg) of PET is low, and products processed at high temperatures are prone to bending deformation
Therefore, the scope of application of PET materials is limited

Method used

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  • Aromatic copolyester and preparation method thereof
  • Aromatic copolyester and preparation method thereof
  • Aromatic copolyester and preparation method thereof

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preparation example Construction

[0038] The present invention also provides a kind of preparation method of above-mentioned aromatic copolyester, comprising:

[0039] (1) Mix terephthalic acid or its esterified product, bis[4-(2-hydroxyethoxy)phenyl]sulfone, cyclohexanedimethanol, aliphatic dihydric alcohol and esterification catalyst, and carry out esterification Reaction, obtain the first intermediate product, wherein, the structural formula of described two [4-(2-hydroxyethoxy) phenyl] sulfone is as shown in formula (2):

[0040]

[0041] (2) The first intermediate product is subjected to a polycondensation reaction to obtain an aromatic copolyester, wherein the structural formula of the aromatic copolyester is as shown in formula (1):

[0042]

[0043] Among them, x, y, and z are all integers from 1 to 20, n is an integer from 10 to 100, and R 1 is a structural unit corresponding to aliphatic dihydric alcohol, the R 1 The chemical structural formula is -(CH 2 )m -, m is an integer from 2 to 8, R ...

Embodiment 1

[0068] Add 0.25mol of dimethyl terephthalate, 0.125mol of bis[4-(2-hydroxyethoxy)phenyl]sulfone, 0.075mol of 1,4-cyclohexanedimethanol and 0.2mol of ethylene glycol to the polymerization The reactor was then charged with 0.15% anhydrous zinc acetate based on the molar amount of dimethyl terephthalate. Under an inert atmosphere, react at 190° C. for 4 hours to obtain the first intermediate product.

[0069] 0.12% antimony trioxide based on the molar amount of dimethyl terephthalate, 0.12% triphenyl phosphate based on the molar amount of dimethyl terephthalate and The theoretical yield is 0.1% antioxidant-1010, the vacuum degree is gradually reduced to below 100Pa, the temperature is gradually raised to 270°C, and the aromatic copolyester is obtained by reacting for 4.5 hours.

[0070] After testing, the relative number average molecular weight of the aromatic copolyester is 28900g / mol, and the relative weight average molecular weight is 56100g / mol. The aromatic copolyester's ...

Embodiment 2

[0072]Add 0.25mol of dimethyl terephthalate, 0.125mol of bis[4-(2-hydroxyethoxy)phenyl]sulfone, 0.1mol of 1,4-cyclohexanedimethanol and 0.175mol of ethylene glycol to the polymerization The reactor was then charged with 0.15% anhydrous zinc acetate based on the molar amount of dimethyl terephthalate. Under an inert atmosphere, react at 200° C. for 4.5 hours to obtain the first intermediate product.

[0073] 0.12% antimony trioxide based on the molar amount of dimethyl terephthalate, 0.12% triphenyl phosphate based on the molar amount of dimethyl terephthalate and The theoretical yield is 0.1% antioxidant-1010, the vacuum degree is gradually reduced to below 100Pa, the temperature is gradually raised to 280°C, and the aromatic copolyester is obtained by reacting for 5.0 hours.

[0074] After testing, the relative number average molecular weight of the aromatic copolyester is 27200g / mol, and the relative weight average molecular weight is 53600g / mol. After detection, the molar...

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Abstract

The invention relates to an aromatic copolyester and a preparation method thereof. The structural formula of the aromatic copolyester is shown in a formula (1), wherein x, y and z are all integers of1-20; n is an integer of 10-100; R<1> is a structural unit corresponding to aliphatic hydrocarbon dihydric alcohol, and the chemical structural formula of the R<1> is -(CH2)m-, wherein m is an integerof 2-8; R<2> is a structural unit corresponding to cyclohexane dimethanol, and the chemical structural formula of the R<2> is -C8H14O2-. The glass transition temperature of the aromatic copolyester reaches 80-120 DEG C, and the aromatic copolyester has high toughness and impact resistance, has the characteristics of excellent heat resistance, good mechanical property, high transparency and the like, can meet manufacturing requirements of fields such as baby bottles, children toys, water cups, kitchen and electric products, food packaging, electronic and electrical appliances, optical fields,decorative materials, automobile manufacturing and the like, and has special applications in the field of light bulletproof glass.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an aromatic copolyester and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) has good barrier properties and good dimensional stability, and can be widely used in food packaging, optical devices, decorative materials and other fields. However, the toughness of plastic parts in the injection molding process of traditional PET is insufficient, resulting in high brittleness and easy cracking of processed products, which affects the range of use and safety of products. Moreover, the glass transition temperature (Tg) of PET is relatively low, and products processed at high temperatures are prone to bending deformation. Therefore, the application range of PET materials is limited. Contents of the invention [0003] Based on this, in order to overcome the above problems, an aromatic copolyester and a preparation method thereof are provide...

Claims

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Application Information

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IPC IPC(8): C08G63/688
CPCC08G63/6886
Inventor 王静刚刘小青慎昂张小琴张传芝朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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