A kind of polybutylene 2,5-furandicarboxylate copolyester and preparation method thereof

A technology of furandicarboxylic acid and copolyester, which is applied in the field of materials and polymers, can solve the problems of poor impact strength, brittleness, and easy crystallization, and achieve high elongation at break, high impact strength, and good toughness

Active Publication Date: 2020-01-31
芜湖万隆新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although PBF has good mechanical properties, it is easy to crystallize, brittle, and has poor impact strength. Therefore, it is necessary to develop a polyester with good impact strength and toughness.

Method used

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  • A kind of polybutylene 2,5-furandicarboxylate copolyester and preparation method thereof
  • A kind of polybutylene 2,5-furandicarboxylate copolyester and preparation method thereof
  • A kind of polybutylene 2,5-furandicarboxylate copolyester and preparation method thereof

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preparation example Construction

[0030] The present invention provides a kind of preparation method of the copolyester of formula (I) structure, comprising:

[0031] A) 2,5-furandicarboxylic acid or its derivatives are mixed with 1,4-butanediol and a long-chain diol of formula (II) and a catalyst to obtain a prepolymer; the 2,5-furandicarboxylic acid or its derivatives are 2,5-furandicarboxylic acid or dimethyl 2,5-furandicarboxylate;

[0032] B) the prepolymer is carried out polycondensation reaction, obtains the poly-2,5-furandiol copolyester of formula (I) structure;

[0033]

[0034] Where a≧1, b≧1, n≧1, x≧0, y≧0, and x and y are both 0.

[0035] In the present invention, first, 2,5-furandicarboxylic acid or its derivatives, 1,4-butanediol, long-chain dihydric alcohols with the structure of formula (II), and a catalyst are added into a reaction flask, and stirred and reacted under the protection of an inert gas to obtain prepolymer.

[0036] According to the present invention, the molar ratio of the...

Embodiment 1

[0054] Add 1.00mol 2,5-furandicarboxylic acid, 1.52mol 1,4-butanediol and 0.08mol 1,2-decanediol into the reaction flask, stannous oxalate is used as catalyst, accounting for 0.3 mole fraction of 2,5-furandicarboxylic acid %, under the protection of nitrogen, stirred and reacted at 230°C for 2h to form a prepolymer;

[0055] Vacuumize the above prepolymer to 0.070MPa, and stir at 240°C for 6h to obtain poly-2,5-furandicarboxylic acid-butylene glycol-1,2-decanediol copolyester (PBSF). Polybutylene 2,5-furandicarboxylate (PBF) synthesized under the same conditions was used as a comparison.

[0056] The performance of the poly-2,5-furandicarboxylic acid-butylene glycol-1,2-decanediol copolyester prepared in Example 1 of the present invention was measured, and at the same time, the poly-2,5-furandiol synthesized under the same conditions Butylene glycol formate (PBF) was used for comparative determination. The result is as figure 1 and shown in Table 1. in figure 1 The NMR fi...

Embodiment 2

[0060] Add 1.00mol of 2,5-furandicarboxylic acid, 1.52mol of 1,4-butanediol and 0.08mol of 1,2-dodecanediol into the reaction flask, tetrabutyl titanate is used as a catalyst, accounting for 2,5-furandicarboxylic acid moles 0.1% of the fraction, under the protection of nitrogen, stirred and reacted at 230°C for 1.5h to form a prepolymer;

[0061] The above prepolymer was evacuated to 0.070MPa, stirred and reacted at 240° C. for 6 hours to obtain poly-2,5-furandicarboxylic acid-butylene glycol-1,2-dodecanediol copolyester (PBTF).

[0062] The poly-2,5-furandicarboxylic acid-butylene glycol-1,2-dodecanediol copolyester prepared in Example 2 of the present invention was tested for performance, and at the same time, the poly-2,5-furan synthesized under the same conditions Butylene glycol diformate (PBF) was used for comparative determination. The results are shown in Table 2.

[0063] Table 2

[0064]

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Abstract

The invention provides copolyester of the structure as shown in the formula (I), wherein a is more than or equal to 1; b is more than or equal to 1; n is more than or equal to 1; x is more than or equal to 0; y is more than or equal to 0; x and y are not 0 at the same time. According to the preparation method, the crystallization behavior of 2,5-furadicarboxylic acid or a derivative thereof is changed by polymerization reaction of 2,5-furadicarboxylic acid or the derivative thereof with ethanediol, 1,4-butanediol, long-chain dihydric alcohol of a structure as shown in the formula (II) and a catalyst, so as to finally obtain the structure as shown in the formula (I), which is high in co-polyester toughness and high in elongation at break and impact strength.

Description

technical field [0001] The invention relates to the technical field of materials and macromolecules, in particular to a poly(2,5-butylene furandicarboxylate) copolyester and a preparation method thereof. Background technique [0002] Polybutylene 2,5-furandicarboxylate (PBF), which is similar in structure to polybutylene terephthalate (PBT), is considered to be a substitute for PBT. It is composed of 2,5-furandicarboxylic acid and It is obtained by polymerization of 1,4-butanediol. It is 100% bio-based polyester with good thermal stability and mechanical properties. It is a new type of environmentally friendly green polyester material. [0003] Although PBF has good mechanical properties, it is easy to crystallize, brittle, and has poor impact strength. Therefore, it is very necessary to develop a polyester with good impact strength and good toughness. Contents of the invention [0004] In view of this, the technical problem to be solved by the present invention is to pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/672C08G63/78
CPCC08G63/672C08G63/78
Inventor 周光远姜敏张强王国强王瑞
Owner 芜湖万隆新材料有限公司
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