Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility
In this study, the post-curing kinetic, molecular mobility and mechanical behavior of polymethylacrylimide (PMI), synthesized from methacrylic acid and methacrylonitrile, were systematically investigated. Differential scanning calorimetry results identified three distinct temperature zones during th...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-02-01
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| Series: | Polymer Testing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941825000340 |
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| author | Yuan Chen Xiaolian Qiang Yaping Zhang Ningning Song Lixian Guo Siyuan Zhang Chunrong Tian Keping Chen |
| author_facet | Yuan Chen Xiaolian Qiang Yaping Zhang Ningning Song Lixian Guo Siyuan Zhang Chunrong Tian Keping Chen |
| author_sort | Yuan Chen |
| collection | DOAJ |
| description | In this study, the post-curing kinetic, molecular mobility and mechanical behavior of polymethylacrylimide (PMI), synthesized from methacrylic acid and methacrylonitrile, were systematically investigated. Differential scanning calorimetry results identified three distinct temperature zones during the post-curing process, which represented different types of curing reactions. Model-free kinetic methods were used to evaluate the post-curing kinetics of PMI materials. Fourier transform infrared spectroscopy demonstrated that the cyclization of anhydride groups predominantly occurred at lower post-curing temperatures, while the decomposition and transformation were observed at higher temperatures. Meanwhile, there was a progressive formation of imide rings with the increase of post-curing temperature. In addition, the molecular segment mobility of PMI materials was investigated via dielectric relaxation spectroscopy, and molecular segment mobility was gradually restricted during the post-curing process, indicated the formation of crosslinked network structure. Those changes of microstructures agreed well with the evolution of compressive properties. This study provides insights into the curing kinetics and structural evolution of PMI during post-curing process, offering guidance for optimizing post-curing conditions to achieve superior mechanical performance. |
| format | Article |
| id | doaj-art-d20c4834ca30477db73aed7358b38c0d |
| institution | Kabale University |
| issn | 1873-2348 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj-art-d20c4834ca30477db73aed7358b38c0d2025-02-03T04:16:27ZengElsevierPolymer Testing1873-23482025-02-01143108720Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobilityYuan Chen0Xiaolian Qiang1Yaping Zhang2Ningning Song3Lixian Guo4Siyuan Zhang5Chunrong Tian6Keping Chen7Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR ChinaInstitute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR ChinaSchool of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, PR ChinaInstitute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China; Corresponding author.Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR ChinaInstitute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China; School of Materials and Chemistry, Southwest University of Science and Technology, Mianyang, 621010, PR ChinaInstitute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR ChinaInstitute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, PR China; Corresponding author.In this study, the post-curing kinetic, molecular mobility and mechanical behavior of polymethylacrylimide (PMI), synthesized from methacrylic acid and methacrylonitrile, were systematically investigated. Differential scanning calorimetry results identified three distinct temperature zones during the post-curing process, which represented different types of curing reactions. Model-free kinetic methods were used to evaluate the post-curing kinetics of PMI materials. Fourier transform infrared spectroscopy demonstrated that the cyclization of anhydride groups predominantly occurred at lower post-curing temperatures, while the decomposition and transformation were observed at higher temperatures. Meanwhile, there was a progressive formation of imide rings with the increase of post-curing temperature. In addition, the molecular segment mobility of PMI materials was investigated via dielectric relaxation spectroscopy, and molecular segment mobility was gradually restricted during the post-curing process, indicated the formation of crosslinked network structure. Those changes of microstructures agreed well with the evolution of compressive properties. This study provides insights into the curing kinetics and structural evolution of PMI during post-curing process, offering guidance for optimizing post-curing conditions to achieve superior mechanical performance.http://www.sciencedirect.com/science/article/pii/S0142941825000340PolymethacryimidePost-curingKineticsCross-linking |
| spellingShingle | Yuan Chen Xiaolian Qiang Yaping Zhang Ningning Song Lixian Guo Siyuan Zhang Chunrong Tian Keping Chen Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility Polymer Testing Polymethacryimide Post-curing Kinetics Cross-linking |
| title | Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility |
| title_full | Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility |
| title_fullStr | Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility |
| title_full_unstemmed | Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility |
| title_short | Understanding the post-curing behaviors of polymethylacrylimide: Curing kinetics and molecular mobility |
| title_sort | understanding the post curing behaviors of polymethylacrylimide curing kinetics and molecular mobility |
| topic | Polymethacryimide Post-curing Kinetics Cross-linking |
| url | http://www.sciencedirect.com/science/article/pii/S0142941825000340 |
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