Poly(ethylene 2,5-furandicarboxylate), and preparation method thereof

Abstract

The invention provides poly(ethylene 2,5-furandicarboxylate), which contains the repeating units shown in formula (I) and has a characteristic viscosity not smaller than 0.2 dL / g. The invention also provides a preparation method for poly(ethylene 2,5-furandicarboxylate) provided by the technical scheme, which comprises the following steps of: carrying out esterification reaction on 2,5-furandicarboxylic acid and ethylene glycol under the action of a tin catalyst to obtain a first intermediate product, wherein the esterification reaction pressure is 0.1-0.4 MPa; and carrying out condensation polymerization reaction on the first intermediate product under the pressure of 10-70 Pa to obtain poly(ethylene 2,5-furandicarboxylate). Experiments show that poly(ethylene 2,5-furandicarboxylate) provided by the invention is dark brown, and has a characteristic viscosity of not smaller than 0.2 dL / g, a glass transition temperature of 60-63 DEG C and a melting point of 210-215 DEG C.

Description

Polyethylene glycol 2,5-furandicarboxylate and preparation method thereof technical field The invention belongs to the technical field of polyester, and in particular relates to polyethylene 2,5-furandicarboxylate and a preparation method thereof. Background technique Polyester is a general term for polymers obtained by polycondensation of polyols and polybasic acids. It is a class of engineering plastics with excellent performance and a wide range of uses, including polyethylene terephthalate (PET), polybutylene terephthalate (PBT) and polyarylate, etc. Among them, PET is widely used in the production of engineering plastics and mechanical parts due to its good fiber formation, mechanical properties, wear resistance, creep resistance and electrical insulation. PET is synthesized from terephthalic acid and ethylene glycol through polycondensation reaction, where the molecular formula of ethylene glycol is C 2 h 6 o 2 , the molecular weight is 62.07, and the CAS registr...

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Problems solved by technology

PET is synthesized from terephthalic acid and ethylene glycol through polycondensation reaction, where the molecular formula of ethylene glycol is C 2 h 6 o 2 , the molecular weight is 62.07, and the CAS registration number is 107-21-1. It can be synthesized not only by direct hydration of ethylene oxide, but also by biological fermentation process. It has a wide range of sources and is cheap; the molecular formula of terephthalic acid is C 8 h 6 o 4 , the molecular weight is 166.13, and the CAS registration number is 100-21-0. Although terephthalic acid is the dicarboxylic acid with the largest output, terephthalic acid is a chemical product that depends on petroleum resources. With the depletion of petroleum resources, the production of terephthalic acid will also be limited

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