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Furanyl copolyester and its preparation method

A technology of furan-based copolyester and furandicarboxylic acid, applied in the polymer field, can solve the problems of low glass transition temperature, unfavorable product processing, and difficulty in meeting the requirements, and achieve the effects of improving transparency, not easy to crack, and slowing down thermal crystallization

Active Publication Date: 2021-05-04
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 better the heat resistance of traditional polymer materials, the greater the hardness and brittleness, which is not conducive to the processing of products
For example, the glass transition temperature (Tg) of polyethylene terephthalate (PET), a traditional polymer material, is low. When the rigid segment copolymerization is used to increase its Tg, its brittleness also increases, so it is difficult to Meet the needs of the industry

Method used

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  • Furanyl copolyester and its preparation method
  • Furanyl copolyester and its preparation method
  • Furanyl copolyester and its preparation method

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preparation example Construction

[0028] The preparation method of furyl copolyester provided by the invention comprises:

[0029] (1) 2,5-furandicarboxylic acid or its esterified product, bis[4-(2-hydroxyethoxy)phenyl]sulfone, cyclohexanedimethanol, aliphatic hydrocarbon dibasic alcohol and esterification catalyst are mixed, 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):

[0030]

[0031] (2) The first intermediate product is subjected to a polycondensation reaction to obtain a furyl copolyester, wherein the structural formula of the furyl copolyester is as shown in formula (1):

[0032]

[0033] 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 10, R 2 is a structu...

Embodiment 1

[0070] Dimethyl 2,5-furandicarboxylate 0.25mol, bis[4-(2-hydroxyethoxy)phenyl]sulfone 0.125mol, 1,4-cyclohexanedimethanol 0.075mol and 1,4-butane 0.2 mol of diol was added into the polymerization reactor, and then 0.15% of tetrabutyl titanate based on the molar amount of dimethyl 2,5-furandicarboxylate was added. Under an inert atmosphere, react at 180° C. for 4 hours to obtain the first intermediate product.

[0071] Add 0.12% triphenyl phosphate based on the molar amount of dimethyl 2,5-furandicarboxylate and 0.1% antioxidant-1010 based on the theoretical polymer yield to the first intermediate product, and gradually reduce the vacuum to 100Pa Thereafter, gradually raise the temperature to 240° C., and react for 4.5 hours to obtain a furyl copolyester.

[0072]After testing, the relative number average molecular weight of the furyl-containing copolyester is 28500g / mol, and the relative weight average molecular weight is 47800g / mol. The furyl copolyester's 1 H-NMR such as ...

Embodiment 2

[0074] Dimethyl 2,5-furandicarboxylate 0.25mol, bis[4-(2-hydroxyethoxy)phenyl]sulfone 0.125mol, 1,4-cyclohexanedimethanol 0.05mol and 1,4-butane 0.225 mol of diol was added into the polymerization reactor, and then 0.15% of tetrabutyl titanate based on the molar amount of dimethyl 2,5-furandicarboxylate was added. Under an inert atmosphere, react at 180° C. for 4 hours to obtain the first intermediate product.

[0075] Add 0.12% triphenyl phosphate based on the molar amount of dimethyl 2,5-furandicarboxylate and 0.1% antioxidant-1010 based on the theoretical polymer yield to the first intermediate product, and gradually reduce the vacuum to 100Pa Then, gradually raise the temperature to 235° C., and react for 4 hours to obtain furyl copolyester.

[0076] After testing, the relative number average molecular weight of the furyl-containing copolyester is 31800g / mol, and the relative weight average molecular weight is 54300g / mol. After detection, the molar ratio of bis[4-(2-hydr...

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Abstract

The invention relates to a furyl copolyester and a preparation method thereof. The structural formula of the furyl copolyester is shown in the following formula (1): wherein, x, y, and z are all integers from 1 to 20, and n is 10 to 20. Integer of 100, R 1 is a structural unit corresponding to aliphatic dihydric alcohol, the R 1 The chemical structure of ‑(CH 2 ) m ‑, m is an integer from 2 to 10, R 2 is a structural unit corresponding to cyclohexanedimethanol, the R 2 The chemical structure is ‑C 8 h 14 o 2 -. The furan-based copolyester not only has high toughness and good impact strength, but also has a high glass transition temperature, which can reach 90°C to 120°C. It can not only meet the needs of baby bottles, children's toys, water cups, kitchen appliances, and food packaging. , electronic appliances, optical fields, decorative materials, automobile manufacturing and other fields of manufacturing requirements, but also to meet the special purpose of the field of lightweight bulletproof glass.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a furyl copolyester and a preparation method thereof. Background technique [0002] With the development and progress in the field of polymer technology, in order to meet the special purposes of the industry, polymer materials need to have both high toughness and good high temperature resistance. However, the better the heat resistance of traditional polymer materials, the greater the hardness and brittleness, which is not conducive to the processing of products. For example, the glass transition temperature (Tg) of polyethylene terephthalate (PET), a traditional polymer material, is low. When the rigid segment copolymerization is used to increase its Tg, its brittleness also increases, so it is difficult to meet the needs of the industry. Contents of the invention [0003] Based on this, in order to overcome the above problems, a furyl copolyester and a preparation method t...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78
CPCC08G63/6886C08G63/78
Inventor 王静刚刘小青慎昂张小琴代金月江艳华朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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