Poly-2,5-butanediol furadicarboxylic acid copolyester and preparation method thereof

A technology of furan butanediol copolyester and furandicarboxylic acid, which is applied in the field of materials and polymers, can solve the problems of brittleness, poor impact strength, easy crystallization, etc., and achieves good toughness, elongation at break and impact resistance. high intensity effect

Active Publication Date: 2019-01-08
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 imp

Method used

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  • Poly-2,5-butanediol furadicarboxylic acid copolyester and preparation method thereof
  • Poly-2,5-butanediol furadicarboxylic acid copolyester and preparation method thereof
  • Poly-2,5-butanediol furadicarboxylic acid copolyester and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0030] The present invention provides a method for preparing a copolyester with a structure of formula (I), including:

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

[0032] B) subjecting the prepolymer to a polycondensation reaction to obtain a poly2,5-furan butylene glycol copolyester of the formula (I) structure;

[0033]

[0034] Among them, a≧1, b≧1, n≧1, x≧0, y≧0, x and y are not equal to 0 at the same time.

[0035] The present invention first adds 2,5-furandicarboxylic acid or its derivatives, 1,4-butanediol and long-chain diol of formula (II), and a catalyst into the reaction flask, and stirs and reacts under the protection of inert gas to obtain Prepolymer.

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

Example Embodiment

[0053] Example 1

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

[0055] The prepolymer was evacuated to 0.070 MPa, and stirred at 240° C. for 6 hours to obtain poly-2,5-furandicarboxylic acid-butanediol-1,2-decanediol copolyester (PBSF). The polybutylene-2,5-furandicarboxylate (PBF) synthesized under the same conditions was used for comparison.

[0056] The performance of the poly-2,5-furandicarboxylic acid-butanediol-1,2-decanediol copolyester prepared in Example 1 of the present invention was measured. At the same time, the poly-2,5-furandi Butylene formate (PBF) was used for comparative determination. The result is figure 1 And shown in Table 1. among them figure 1 This is the NMR map...

Example Embodiment

[0059] Example 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, and tetrabutyl titanate as a catalyst, accounting for 2,5-furandicarboxylic acid moles 0.1% of the fraction, under the protection of nitrogen, the reaction was stirred at 230°C for 1.5h to generate prepolymer;

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

[0062] The performance of the poly-2,5-furandicarboxylic acid-butanediol-1,2-dodecanediol copolyester prepared in Example 2 of the present invention was measured, and at the same time, the poly-2,5-furan synthesized under the same conditions Butanediol dicarboxylate (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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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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