

FOLLOWUS
College of New Energy and Materials, China University of Petroleum, Beijing 102249, China
yehaimu@cup.edu.cn
Received:14 October 2024,
Revised:2024-11-14,
Accepted:19 November 2024,
Online First:17 January 2025,
Published:01 February 2025
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Li, N.; Tian, Y. P.; Wu, T. Y.; Zhou, Q.; Ye, H. M. Revisit the gibbs-thomson equation fitting of poly(butylene succinate) based on oligomer extended-chain crystals. Chinese J. Polym. Sci. 2025, 43, 392–398
Na Li, Yu-Pei Tian, Tian-Yu Wu, et al. Revisit the Gibbs-Thomson Equation Fitting of Poly(butylene succinate) Based on Oligomer Extended-Chain Crystals[J]. Chinese Journal of Polymer Science, 2025, 43(2): 392-398.
Li, N.; Tian, Y. P.; Wu, T. Y.; Zhou, Q.; Ye, H. M. Revisit the gibbs-thomson equation fitting of poly(butylene succinate) based on oligomer extended-chain crystals. Chinese J. Polym. Sci. 2025, 43, 392–398 DOI: 10.1007/s10118-025-3270-5.
Na Li, Yu-Pei Tian, Tian-Yu Wu, et al. Revisit the Gibbs-Thomson Equation Fitting of Poly(butylene succinate) Based on Oligomer Extended-Chain Crystals[J]. Chinese Journal of Polymer Science, 2025, 43(2): 392-398. DOI: 10.1007/s10118-025-3270-5.
The advantages of a fixed surface structure and large thickness of the oligomer ECCs make them ideal for validating the Gibbs-Thomson equation of PBS oligomer ECCs in comparison with the folded-chain lamellae data from previous literature.
The equilibrium melting point (
T
m
0
) is a crucial thermodynamic parameter for characterizing the crystallization and melting behavior of semi-crystalline polymers. However
the direct measurement of
T
m
0
poses a significant challenge because of the difficulty in physically fabricating fully-extended chain crystals of high-molecular-weight polymers. Therefore
various extrapolation equations for
T
m
0
have been proposed that utilize the thermal properties of ordinary folded-chain lamellae. Among these
the Gibbs-Thomson equation is one of the most commonly employed for modeling. Despite its widespread use
there are notable variations in the
T
m
0
values obtained by different research groups
ev
en when based on similar samples. This raises questions about the validity and accuracy of using the Gibbs-Thomson equation to linearly extrapolate
T
m
0
. In this study
we prepared a series of oligomer extended-chain crystals (ECCs) of poly(butylene succinate) (PBS) and used their properties for Gibbs-Thomson fitting. The results reveal a perfect linear relationship
with an extrapolated
T
m
0
value of 136.08 °C. The basal surface free energy of the oligomer ECCs was calculated as 0.084 J/m
2
which is approximately twice that of folded-chain lamellae. This difference is attributed to the aggregation of highly mobile free tails on the crystal surface. The two structural features of oligomer ECCs—large thickness and fixed surface—better fulfill the conditions for applying the Gibbs-Thomson equation
ensuring its validity and accuracy. Therefore
we believe that the Gibbs-Thomson fit can produce reliable results when sufficient high-quality data are used.
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