Tuning the Structure and Properties of Poly(ethylene terephthalate)/Poly(butylene terephthalate) Blend Monofilaments: Mechanism of Transesterification and Gradient Structure Development

Zhong-Li Zhang; Bo-Hao Li; Jia-Ke Fan; Kang Chen; Yi-Ning Hao; Xin-Yu Liu; Xian-Ming Zhang

doi:10.1007/s10118-026-3673-y

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Tuning the Structure and Properties of Poly(ethylene terephthalate)/Poly(butylene terephthalate) Blend Monofilaments: Mechanism of Transesterification and Gradient Structure Development

RESEARCH ARTICLE | Updated：2026-07-15

- Tuning the Structure and Properties of Poly(ethylene terephthalate)/Poly(butylene terephthalate) Blend Monofilaments: Mechanism of Transesterification and Gradient Structure Development
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-12(2026)
- Affiliations：
  
  a.School of Materials Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
  b.Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing 312030, China
- Author bio：
  
  chenkang@zstu.edu.cn
- Funds：
- DOI：10.1007/s10118-026-3673-y
  CLC：
- Received：08 February 2026，
  
  Revised：2026-03-17，
  
  Accepted：30 March 2026，
  
  Online First：15 July 2026，
  
  Published：15 August 2026
- Accepted：
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Zhang, Z. L.; Li, B. H.; Fan, J. K.; Chen, K.; Hao, Y. N.; Liu, X. Y.; Zhang, X. M. Tuning the structure and properties of poly(ethylene terephthalate)/poly(butylene terephthalate) blend monofilaments: mechanism of transesterification and gradient structure development. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3673-y

Zhong-Li Zhang, Bo-Hao Li, Jia-Ke Fan, et al. Tuning the Structure and Properties of Poly(ethylene terephthalate)/Poly(butylene terephthalate) Blend Monofilaments: Mechanism of Transesterification and Gradient Structure Development[J/OL]. Chinese Journal of Polymer Science, 2026, 441-12.
Zhang, Z. L.; Li, B. H.; Fan, J. K.; Chen, K.; Hao, Y. N.; Liu, X. Y.; Zhang, X. M. Tuning the structure and properties of poly(ethylene terephthalate)/poly(butylene terephthalate) blend monofilaments: mechanism of transesterification and gradient structure development. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3673-y DOI：

Zhong-Li Zhang, Bo-Hao Li, Jia-Ke Fan, et al. Tuning the Structure and Properties of Poly(ethylene terephthalate)/Poly(butylene terephthalate) Blend Monofilaments: Mechanism of Transesterification and Gradient Structure Development[J/OL]. Chinese Journal of Polymer Science, 2026, 441-12. DOI： 10.1007/s10118-026-3673-y.

摘要

Abstract

To address the limited toughness of poly(ethylene terephthalate) (PET) monofilaments arising from the inherent molecular chain rigidity

this study prepared PET/poly(butylene terephthalate) (PBT) blend monofilaments

via

the melt-blend spinning method to enhance their toughness. The influence of PBT content on the structural evolution and properties of the blend system was systematically investigated. These results indicate that the PBT content significantly influences the extent of transesterification and compatibility

thereby dictating the mechanical behavior of the monofilaments. At a low PBT content of 2 wt%

transesterification was negligible. The monofilaments exhibited a uniform radial gradient orientation without a distinct skin-core structure

demonstrating optimal overall mechanical performance with markedly improved strength. Specifically

the tensile

loop

and knot strengths were 611

421

and 443 MPa

respectively. When the PBT content exceeded 5 wt%

the flexible chain segments of PBT enhanced the molecular chain mobility in the blend chips

leading to an increase in crystallite size. However

intensified transesterification concurrently reduces the crystallizability and degrades the mechanical properties. At PBT contents above 15 wt%

SEM analysis revealed phase separation and pronounced heterogeneity in the radial gradient structure of the blend monofilaments

resulting in a significant deterioration of the mechanical properties. This study elucidates the pivotal role of blending ratio in governing the “composition-structure-property” relationship of PET/PBT-blended monofilaments

revealing the underlying mechanism of transesterification and gradient structure development. These findings provide a theoretical foundation for the design of high-performance PET monofilaments.

关键词

Keywords

references

Chen, K.; Zhang, Y.; Liu, C.; Zhang, Y.; Zhang, X. The evolution of structure and properties in high-tenacity poly(ethylene terephthalate) industrial fibers during thermal-oxidative aging process. Polymer 2024 , 307 , 127246..

Di Lorenzo, M. L. Crystallization of Poly(ethylene terephthalate): a review. Polymers 2024 , 16 , 1975..

Lei, H.; Qiu, Y.; Pan, Z.; He, B.; Yan, T. Weavable PPy/WPU/PET composite conductive fibers with high durability for multifunctional sensing applications. Polymer 2025 , 336 , 128886..

Fan, C.; Liu, Y.; Zhang, Y. A universal, highly sensitive and seamlessly integratable textile resistive strain sensor. Adv. Fiber Mater. 2024 , 6 , 1152−1161..

Su, J. juan; Peng, F.; Gao, X.; Yang, G. hui; Fu, Q.; Wang, K. Superior toughness obtained via tuning the compatibility of poly(ethylene terephthalate)/poly(ethylene-octene) blends. Mater. Des. 2014 , 53 , 673−680..

Song, Q. L; Wen, H. Y; de Clav ille Christiansen, J.; Yu, D. H; Chen, C. S; Jiang, S. C. Analysis of structure transition and compatibility of PTT/PC blend without transesterification. Chinese J. Polym. Sci. 2016 , 34 , 1172−1182..

Miao, Z.; Li, L.; Xie, Y. H; Feng, D.; Wu, F.; Xie, D.; Liu, Y.; Mei, Y. Revisiting maleic anhydride-grafted biopolymers for improved compatibility and toughening of PLA/PBAT blends: Effects of molecular weight and grafting ratio. Polymer 2025 , 320 , 128055..

Jiang, C.; Chen, P.; Mi, J.; Wang, X. PET composite foam with high stiffness and high ductility: synergistic effect of Toughener combined with simultaneous in-situ fibrillation of LCP/PTFE. Polymer 2025 , 333 , 128646..

Tan, Z.; Liu, S.; Cui, X.; Wu, G.; Sun, S.; Zhang, H. Toughening of poly(ethylene terephthalate) and optimizing of the compatibilization between PET and EPDM by functionalized EPDM. Polym. Plast. Technol. Eng. 2014 , 53 , 141−149..

Mazraeh-Shahi, Z. T.; Mojtahedi, M. R. M. Effect of blending two fiber-grade polypropylenes with different molecular weight distributions on the physical and structural properties of melt-spun filament yarns. J. Text. Inst. 2010 , 101 , 547−555..

Chen, S.; Fu, X.; Jing, Z.; Chen, H. Non-isothermal crystallization kinetics and rheological behaviors of PBT/PET blends: effects of PET property and nano-silica content. Des. Monomers Polym. 2022 , 25 , 32−46..

Mao, H. I.; Chou, J. Y.; Lin, S. Y.; Wang, C. Y.; Chen, C. H.; Chen, C. W. Enhancing poly(butylene terephthalate) (PBT) fiber orientation and tenacity via controlled recycling of composition-tuned vitrimers. Polymer 2025 , 329 , 128491..

Marcinčin, A. Modification of fiber-forming polymers by additives. Prog. Polym. Sci. 2002 , 27 , 853−913..

Avramova, N. Amorphous poly(ethylene terephthalate)/poly(butylene terephthalate) blends: miscibility and properties. Polymer 1995 , 36 , 801−808..

Aravinthan, G.; Kale, D. D. Blends of poly(ethylene terephthalate) and poly(butylene terephthalate). J. Appl. Polym. Sci. 2005 , 98 , 75−82..

Leung, W. H.; Leitao, E. M.; Verbeek, C. J. R. Polyester transesterification through reactive blending and its applications: a comprehensive review. Polymer 2025 , 329 , 128488..

Bi, X.; Li, J.; Guo, J.; Yu, C. A novel in-situ crosslinking wet spinning method for promoting the strength of CNC/alginate fiber. Polymer 2025 , 325 , 128313..

Pan, D.; He, H.; Sun, J.; Cao, M.; Qin, Z.; Chen, L. Radial crystallization difference of melt-spun polypropylene fiber along spinning line. J. Appl. Polym. Sci. 2019 , 136 , 47175..

Davies, R. J.; Burghammer, M.; Riekel, C. Probing the internal structure of high-performance fibers by on-axis scanning diffractometry. Macromolecules 2007 , 40 , 5038−5046..

Perret, E.; Chen, K.; Braun, O.; Muff, R.; Hufenus, R. Radial gradients in PET monofilaments: A Raman mapping and SAXS tomography study. Polymer 2022 , 238 , 124422..

Ren, H.; He, Z.; Xu, J.; Yan, X.; Liu, P. Evaluation of the abilities o f ozone resistance for polyamide fibers: structures, properties, and aging mechanism. Ind. Eng. Chem. Res. 2019 , 58 , 17814−17823..

Hahm, W. G.; Ito, H.; Kikutani, T. Structural evolution of poly(ethylene terephthalate) fibers in high-speed in-line drawing process. Polymer 2025 , 319 , 128010..

Nowicka, W.; Rozanski, A.; Pasha, F. A.; Jasinska-Walc, L.; Duchateau, R. Polyethylene-like polyesters: strategies for tailoring mechanical properties and adhesion performance. Macromolecules 2025 , 58 , 9440−9449..

Chen, X. X.; Yu, J. C.; Chen, K.; Ji, P.; Chen, X. L.; Pan, Z. J. Facile and large-scale fabrication of biodegradable thermochromic fibers based on poly(lactic acid). Chinese J. Polym. Sci. 2022 , 40 , 1242−1251..

Ohara, A.; Kojio, K. X-ray scattering analyses on an aggregation structure of poly(ethylene terephthalate) films under bending deformation. Macromolecules 2024 , 57 , 3687−3695..

Liu, P.; Zhang, Z.; Zhu, H.; Deng, X.; Li, Z.; Li, Y.; Lv, J.; Zhang, D.; Liu, X.; Luo, L. Skin-core structural homogeneity and stress-induced ordering enable extrinsic toughening in rigid-chain heterocyclic aramid fibers. Macromolecules 2025 , 58 , 9358−9372..

Liu, C.; Zhang, Y.; Chen, K.; Li, B.; Zhang, Z.; Fan, J.; Yin, Y.; Zhang, X. Disclosing the UV aging mechanisms of polyamide 66 industrial fiber on the base of the multi-scale structural evolutions. Polymer 2025 , 316 , 127872..

Liu, S.; Li, W.; Liang, B.; Yu, Y. Chain structure and thermal behavior of reactive blends of poly(ethylene terephthalate)/poly(butylene terephthalate) by addition of 2,2′-(1,4-phenyl) bisoxazoline. Eur. Polym. J. 2000 , 36 , 2159−2165..

Newmark, R. A. Sequence distribution in polyethylene/tetramethylene terephthalate copolyesters by 13 C-NMR. J. Polym. Sci. Polym. Chem. Ed. 1980 , 18 , 559−563..

Wang, F.; Meng, X.; Xu, X.; Wen, B.; Qian, Z.; Gao, X.; Ding, Y.; Zhang, S.; Yang, M. Inhibited transesterification of PET/PBT blends filled with silica nanoparticles during melt processing. Polym. Degrad. Stabil. 2008 , 93 , 1397−1404..

Ucpinar Durmaz, B.; Ozturk, C.; Aytac, A. Reduced graphene oxide reinforced PET / PBT nanocomposites: compatibilization and characterization. Polym. Eng. Sci. 2020 , 60 , 2606−2618..

Yu, Y.; Choi, K. J. Crystallization in blends of poly(ethylene terephthalate) and poly(butylene terephthalate). Polym. Eng. Sci. 1997 , 37 , 91−95..

Zhang, T.; Zhang, L.; Li, C. Inhibited transesterification of poly(butylene terephthalate)/poly(ethylene terephthalate)/SiO 2 nanocomposites by two processing methods. J. Macromol. Sci. B 2011 , 50 , 453−462..

Zhou, X. W.; Huang, J.; Zhang, X. H.; Li, T.; Wang, Y.; Wang, S. B.; Xia, B. H.; Dong, W. F. Design of tough, yet strong, heat-resistant PLA/PBAT blends with reconfigurable shape memory behavior by engineering exchangeable covalent crosslinks. Chinese J. Polym. Sci. 2023 , 41 , 1868−1878..

Safonov, P. E.; Levakova, N. M.; Yukhin, S. S. Evaluation of the industrial processability of high-strength and high-modulus yarns in weaving, taking into account abrasion resistance. Fibre Chem. 2016 , 47 , 397−402..

Zhang, W.; Song, H.; Liu, Y.; Chen, J.; Shi, J.; Li, L. Polyethylene-grafted poly(hexamethylene guanidine) modified ultra-high molecular weight polyethylene monofilaments and their antimicrobial properties. R. Soc. Open Sci. 2025 , 12 , 250340..

Meng, C.; Qu, J. ping. Mechanical and thermal properties of polybutylene terephthalate/ethylene-vinyl acetate blends using vane extruder. e-Polymers 2018 , 18 , 67−73..

Yamamoto, Y.; Hoshina, H.; Sato, H. Differences in intermolecular interactions and flexibility between poly(ethylene terephthalate) and poly(butylene terephthalate) studied by far-infrared/terahertz and low-frequency Raman spectroscopy. Macromolecules 2021 , 54 , 1052−1062..

Patcheak, T. D.; Jabarin, S. A. Structure and morphology of PET/PEN blends. Polymer 2001 , 42 , 8975−8985..

Heidrich, D.; Gehde, M. The 3-phase structure of polyesters (PBT, PET) after isothermal and non-isothermal crystallization. Polymers 2022 , 14 , 793..

Fan, R.; Sun, N.; Zhang, Y.; Zhang, Y. The feasibility and rationale for utilizing high molecular weight PBT in the preparation of high-strength fiber. Polymer 2024 , 311 , 127484..

Abou-Kandil, A. I.; Windle, A. H. The development of microstructure in oriented polyethylene terephthalate (PET) during annealing. Polymer 2007 , 48 , 5069−5079..

Perret, E.; Braun, O.; Sharma, K.; Tritsch, S.; Muff, R.; Hufenus, R. High-resolution 2D Raman mapping of mono- and bicomponent filament cross-sections. Polymer 2021 , 229 , 124011..

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