RESEARCH ARTICLE

High Glass Transition PEcBT and PEPecBT Copolyesters Synthesized by Direct Esterification Route

Yanru Chen

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Contribution: Data curation (lead), Formal analysis (equal), Investigation (lead), Methodology (equal), Validation (lead), Visualization (lead), Writing - original draft (lead)

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Linbo Wu,

Corresponding Author

Linbo Wu

[email protected]

orcid.org/0000-0001-9964-6140

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Correspondence:

Linbo Wu ([email protected])

Contribution: Conceptualization (lead), Formal analysis (equal), Funding acquisition (lead), Methodology (equal), Project administration (lead), Resources (lead), Supervision (lead), Writing - review & editing (lead)

Search for more papers by this author

Yanru Chen,

Yanru Chen

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Contribution: Data curation (lead), Formal analysis (equal), Investigation (lead), Methodology (equal), Validation (lead), Visualization (lead), Writing - original draft (lead)

Search for more papers by this author

Linbo Wu,

Corresponding Author

Linbo Wu

[email protected]

orcid.org/0000-0001-9964-6140

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China

Correspondence:

Linbo Wu ([email protected])

Search for more papers by this author

First published: 26 January 2025

https://doi.org/10.1002/app.56781

Funding: This work was funded by the Science and Technology Plan Project of Zhejiang Province (No. 2022C01060), the National Natural Science Foundation of China (NSFC) (project no. 52173107) and State Key Laboratory of Chemical Engineering (No. SKL-ChE-23T05).

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ABSTRACT

2,2,4,4-Tetramethyl-1,3-cyclobutanediol (CBDO) based copolyesters like poly(cyclohexane dimethylene-co-2,2,4,4-tetramethyl cyclobutylene terephthalate) (PCcBT) has high transparency, heat-resistance and safety and has been commercialized to replace bisphenol A polycarbonate in food contact applications. However, its synthesis and processing suffer from CBDO sublimation, composition deviation and relatively poor thermal stability. In order to obtain transparent heat-resistant CBDO-based copolyesters with improved synthesis robustness and thermal stability, poly(ethylene co-tetramethyl cyclobutene terephthalate (PEcBT)) copolyesters were synthesized from ethylene glycol (EG), CBDO, and terephthalic acid (TPA) via direct esterification route, and the structure–property was studied. It is found that the presence of EG effectively inhibited the sublimation of CBDO, and the resulting PEcBT copolyesters had reasonably good thermal stability so that the melt polycondensation proceeded smoothly without serious foaming. PEcBT copolyesters with intrinsic viscosity ([η]) over 0.60 dL/g were successfully synthesized at copolymer composition (ϕ _cBT) up to 67 mol%. A quantitative relationship between T _g and its influence factors is established. The copolyesters with ϕ _cBT of 48–62 mol% displayed T _g of 126°C–144°C, flexible tensile behavior, satisfactory tensile properties and reasonably good impact performance. Ternary PEPecBT copolyesters were also synthesized using 1,5-pentanediol as another diol comonomer to improve toughness of the materials.

Conflicts of Interest

The authors declare no conflicts of interest.

Open Research

Data Availability Statement

Data will be made available on request.

Supporting Information

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Volume142, Issue17

May 5, 2025

e56781

High Glass Transition PEcBT and PEPecBT Copolyesters Synthesized by Direct Esterification Route

ABSTRACT

Conflicts of Interest

Open Research

Data Availability Statement

Supporting Information

References

References

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High Glass Transition PEcBT and PEPecBT Copolyesters Synthesized by Direct Esterification Route

ABSTRACT

Conflicts of Interest

Open Research

Data Availability Statement

Supporting Information

References

References

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