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| Main Authors: | , , , , , , , , |
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| Format: | Artículo Open Access |
| Published: |
Wiley
2025
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| Subjects: | |
| Online Access: | https://onlinelibrary.wiley.com/doi/10.1002/app.57782 |
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Table of Contents:
- Synthesis and Characterization of Thermoplastic Polyamide 12 Elastomers: Mechanical Performance at Low Temperatures and Non‐Isothermal Crystallization Kinetics Fangchun Chen Haoyi Hu Cuimin Huang Xia Huang Jiaojiao Shang Xuanhui Zhang Wenqi Wang Jianwu Lan Shaojian Lin Journal of Applied Polymer Science ABSTRACT Three grades of polyamide 12 elastomers (TPAE12) were synthesized via a one‐pot melt polycondensation method with varying soft to hard segment ratios. The chemical structure of the synthesized TPAE12 was confirmed using Fourier transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance ( 1 H NMR) spectroscopy. Low‐temperature mechanical properties were evaluated using an electronic universal testing machine and a dynamic mechanical analyzer. Furthermore, the non‐isothermal crystallization behavior of TPAE12 under various cooling rates was investigated. The results indicated that higher cooling rates shifted crystallization peaks to lower temperatures and broadened them. An increased proportion of hard chain segments resulted in a significant rise in the absolute value of the crystallization enthalpy and a general increase in the crystallization peak temperature. Non‐isothermal crystallization kinetics were analyzed using the Jeziorny and Mo models, with activation energy (Δ E ) calculated via Kissinger's equation. According to the Jeziorny method, the faster cooling rates accelerate crystallization and shorten crystallization time, while TPAE12 exhibits single‐mode growth at the initial stages, transitioning to a complex multidimensional crystal pattern at later stages. Modeling by Mo's method further revealed that the crystallization rate generally increased with both the relative degree of crystallinity and the hard chain segment proportion. 10.1002/app.57782 http://onlinelibrary.wiley.com/termsAndConditions#vor