Crystallization Kinetics, Crystallization and Melting Lines of Deuterated and Hydrogenous Isotactic Polybutene-1

IF 5.1 1区化学 Q1 POLYMER SCIENCE

Macromolecules Pub Date : 2025-02-20 DOI:10.1021/acs.macromol.4c02988

Xintong Zhao, Ninghua He, Ying Lu, Yongfeng Men

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引用次数: 0

Abstract

The kinetics of crystallization, lamellar long period, and melting temperatures (T_m) of hydrogenous isotactic polybutene-1 (hPB-1) and its fully deuterated counterpart (deuterated isotactic polybutene-1, dPB-1) with similar molecular weight at different isothermal crystallization temperatures (T_c) were investigated by means of fast scanning chip calorimetry and synchrotron microfocus small-angle X-ray scattering techniques. The Hoffman–Weeks plot where T_m was plotted as a function of T_c was used to determine the equilibrium melting point by extrapolating the data to T_m = T_c. Moreover, following the Gibbs–Thomoson equation and Strobl’s multistage crystallization model, the melting line and crystallization line where T_m or T_c is plotted as a function of inversed lamellar long period (1/d_ac) were constructed to determine the equilibrium melting temperature and equilibrium crystallization temperature by extrapolating the corresponding lines to infinite lamellar long period. The hPB-1 displays faster crystallization rates across the entire temperature range, suggesting a higher supercooling driving its crystallization than in dPB-1. However, hPB-1 possesses a lower equilibrium melting point/temperature but a higher equilibrium crystallization temperature than dPB-1. This peculiar isotope effect on the crystallization behavior of isotactic polybutene-1 provides a unique example supporting the crystallization mechanism proposed by Strobl where the supercooling with respect to the equilibrium crystallization temperature determines the crystallization kinetics.

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.