Investigation of Rapid Non-Isothermal Crystallization Kinetics of Polyamide 66 Using a Fast-Scanning Chip-Based DSC.

Shaokui Tan, Ming Li, Zechun Li, Jun Yan, Zhihao Zhang, Pengcheng Xu, Peide Wu, Xinxin Li

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Article in Sensors (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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8 authors.

Shaokui TanCollege of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China.

Ming LiState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

Zechun LiState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

Jun YanState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

Zhihao ZhangCollege of Chemistry and Materials Science, Shanghai Normal University, Shanghai 200234, China.

Pengcheng XuState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.ORCID 0000-0001-8651-208X

Peide WuState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

Xinxin LiState Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China.

Funding

National Key R&D Program of China 2024YFF1502700National Natural Science Foundation of China 62227815, 62271473

6 · The paper itself

Abstract

Understanding the rapid non-isothermal crystallization behavior of polymers is crucial for tailoring and optimizing their performance. However, conventional techniques are limited in achieving rapid heating and cooling rates, which hinders in-depth investigation of the crystallization kinetics of fast-crystallizing polymers. In this study, a high-scan-rate MEMS thermopile DSC chip is employed to systematically investigate the non-isothermal crystallization kinetics of polyamide 66 (PA66) under rapid temperature variations. The results show that PA66 forms a lamellar α phase under slow cooling (1 °C/s) and a cauliflower-like γ phase under rapid cooling (300 °C/s), and becomes completely amorphous under ultrafast cooling (quenching). Furthermore, the technique enables quantitative analysis of the cold crystallization kinetics of fully amorphous PA66 during rapid heating. The results indicate that PA66 exhibits a higher apparent activation energy for homogeneous nucleation cold crystallization at low heating rates (≤10 °C/s), reaching 172.3 kJ·mol

Indexed as

chip-based DSCfast-scanningkineticMEMS thermopilenon-isothermal crystallization

Identifiers

PMID42122402

DOI10.3390/s26092680

PMCPMC13166010

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