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Volume 15
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10.3390/ma15186286
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Article

PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study

by
Ming Fan
,
Wenhao He
,
Qiangzhi Li
,
Jing Zhou
,
Jie Shen
*,
Wen Chen
and
Yuanying Yu
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Materials 2022, 15(18), 6286; https://doi.org/10.3390/ma15186286
Submission received: 29 July 2022 / Revised: 29 August 2022 / Accepted: 4 September 2022 / Published: 9 September 2022
(This article belongs to the Topic Computational Materials Science for Polymers)
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Abstract

We investigated, via a phase-field model simulation, the effects of a matrix’s properties and a filler’s characters on the polytetrafluoroethylene (PTFE) crystal growth process in composites under various supercooling degrees. The results show that the supercooling degree has a deciding influence on the crystal growth process. The intrinsic properties of PTFE polymer, such as anisotropic strength and phase transition latent heat, affect the growth rate, orientation, and interfacial integrity of the crystal trunk and the branching of the PTFE crystal growth process. The factors of the PTFE crystallization process, such as anisotropic strength and phase translation interface thickness, affect the uniformity and crystallization degree of the PTFE crystal. In the composites, the biphasic interface induces the crystal growth direction via the polymer chain segment migration rate, of which the degree depends on the shapes of the filler and the PTFE crystal nucleus. According to the results, choosing the low molecular weight PTFE and mixture filler with various particle sizes and surface curvatures as the raw materials of PTFE-based composites improves the crystallization of the PTFE matrix.
Keywords: phase-field model; polytetrafluoroethylene (PTFE)-based composites; polymer crystallization phase-field model; polytetrafluoroethylene (PTFE)-based composites; polymer crystallization

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MDPI and ACS Style

Fan, M.; He, W.; Li, Q.; Zhou, J.; Shen, J.; Chen, W.; Yu, Y. PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study. Materials 2022, 15, 6286. https://doi.org/10.3390/ma15186286

AMA Style

Fan M, He W, Li Q, Zhou J, Shen J, Chen W, Yu Y. PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study. Materials. 2022; 15(18):6286. https://doi.org/10.3390/ma15186286

Chicago/Turabian Style

Fan, Ming, Wenhao He, Qiangzhi Li, Jing Zhou, Jie Shen, Wen Chen, and Yuanying Yu. 2022. "PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study" Materials 15, no. 18: 6286. https://doi.org/10.3390/ma15186286

APA Style

Fan, M., He, W., Li, Q., Zhou, J., Shen, J., Chen, W., & Yu, Y. (2022). PTFE Crystal Growth in Composites: A Phase-Field Model Simulation Study. Materials, 15(18), 6286. https://doi.org/10.3390/ma15186286

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