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A kind of multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate and preparation method thereof

A technology of multi-block copolymer and furandicarboxylic acid, applied in the field of polymer materials, can solve the problems of reduced gas barrier property, poor gas barrier property, limited improvement effect of impact toughness, etc., and achieves high gas barrier property, low cost, Simple and easy preparation method

Active Publication Date: 2020-07-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor gas barrier properties of PTMG, the introduction of PTMG inevitably leads to a substantial decrease in the gas barrier properties of PEF-mb-PTMG
[0006] In summary, there are still some deficiencies in toughening PEF and PPF, mainly manifested in the random copolymerization with flexible α-ω-diol or alicyclic cyclohexane diol, which can make PEF While maintaining high tensile modulus, strength and gas barrier properties while improving the tensile toughness, the improvement effect on impact toughness is very limited; by block copolymerization with polyether diol, the tensile and tensile properties of PEF can be made Significantly improved impact toughness, but significantly reduced gas barrier properties

Method used

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  • A kind of multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate and preparation method thereof
  • A kind of multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate and preparation method thereof
  • A kind of multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073](1) Add 70g dimethyl 2,5-furandicarboxylate, 50g ethylene glycol and 0.1g silicon dioxide / titanium dioxide composite to a reactor in a nitrogen atmosphere, react at 190°C for 1 hour, and react at 200°C for 4 hours to obtain Transesterification product; then add 0.08g antimony glycol and polycondense for 3 hours at 240°C under high vacuum (≦133Pa) to obtain prepolymer X.

[0074] (2) Add 8 g of hydroxyl-terminated polycarbonate 1,6-hexanediol ester and chain extender hexamethylene diisocyanate with a molecular weight of 4000 g / mol to the prepolymer X obtained in step (1) for chain extension For the reaction, the amount of the chain extender was 1.06 times the total molar amount of the prepolymer X and the hydroxyl-terminated poly(1,6-hexanediol carbonate) in the reaction system, and the final product was obtained after chain extension at 230° C. for 15 minutes.

[0075] According to the H-NMR measurement, the soft segment of 1,6-hexanediol carbonate accounts for 10% of th...

Embodiment 2

[0077] (1) Add 70g dimethyl 2,5-furandicarboxylate, 50g ethylene glycol and 0.1g silicon dioxide / titanium dioxide composite to a reactor in a nitrogen atmosphere, react at 190°C for 1 hour, and react at 200°C for 4 hours to obtain Transesterification product; then add 0.08g antimony glycol and polycondense for 3 hours at 240°C under high vacuum (≦133Pa) to obtain prepolymer X.

[0078] (2) Add 13 g of hydroxyl-terminated polycarbonate 1,6-hexanediol and chain extender hexamethylene diisocyanate with a molecular weight of 4000 g / mol to the prepolymer X obtained in step (1) for chain extension For the reaction, the amount of the chain extender is 1.06 times the total molar amount of the prepolymer X and the hydroxyl-terminated poly(1,6-hexanediol carbonate) in the reaction system. After chain extension at 230° C. for 15 minutes, the final product was obtained.

[0079] According to the H-NMR measurement, the soft segment of 1,6-hexanediol carbonate accounts for 15% of the mass ...

Embodiment 3

[0081] (1) Add 70g dimethyl 2,5-furandicarboxylate, 60g ethylene glycol and 0.3g silicon dioxide / titanium dioxide composite to a reactor in a nitrogen atmosphere, react at 190°C for 1 hour, and react at 200°C for 4 hours to obtain transesterification product; then add 0.08g of antimony oxide and polycondense for 3 hours at 240°C under high vacuum (≦133Pa) to obtain prepolymer X.

[0082] (2) Add 24 g of hydroxyl-terminated polycarbonate 1,5-pentanediol-co-1,6-hexanediol ester with a molecular weight of 2000 g / mol to the prepolymer X obtained in step (1) (wherein Polycarbonate 1,5-pentanediol ester diol chain molar fraction is 45mol%) and chain extender hexamethylene diisocyanate to carry out chain extension reaction, the amount of chain extender is prepolymer X and hydroxyl in the reaction system 1.06 times the total molar weight of capped polycarbonate 1,5-pentanediol-co-1,6-hexanediol ester. After chain extension at 230° C. for 15 minutes, the final product was obtained.

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Abstract

The invention belongs to the field of high polymer materials, and particularly discloses a multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate, and a preparation method of the multi-block copolymer. A macromolecular chain of the multi-block copolymer is composed of a plurality of 2,5-furandicarboxylic acid polyester hard segments (I) and a plurality of aliphatic polycarbonate soft segments (II), and connection units (III) exist between the 2,5-furandicarboxylic acid polyester hard segments and the aliphatic polycarbonate soft segments; and by adjusting the proportion of the hard segments and the soft segments, materials with different properties from thermoplastic plastics with high barrier property, high toughness and high mechanical strength tothermoplastic plastics with super toughness can be obtained so as to meet different application requirements. The preparation method is simple and feasible, and facilitates industrial application.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a multi-block copolymer based on 2,5-furandicarboxylic acid polyester and aliphatic polycarbonate and a preparation method thereof. Background technique [0002] 2,5-furandicarboxylic acid (FDCA) is a bio-based monomer derived from renewable biomass resources cellulose or hemicellulose, its chemical structure is similar to the petroleum-based monomer terephthalic acid (TPA), and Contains a rigid aromatic group furan ring. Polyesters obtained by polymerization of FDCA and a series of diols have comparable physical and chemical properties to TPA-based polyesters, so they can partially replace their applications to alleviate the current shortage of petrochemical resources and excessive carbon dioxide emissions. In addition, FDCA-based polyesters have unique properties different from TPA-based polyesters, such as polyethylene furandicarboxylate (PEF) and polyethylene ter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/42C08G18/44C08G63/672
CPCC08G18/4247C08G18/44C08G63/672
Inventor 吴林波谢鸿洲
Owner ZHEJIANG UNIV