Activation Energies of Phthalonitrile Resins Using Sulfur- and Oxygen-Based Curing Agents

IF 1.1 4区化学 Q4 CHEMISTRY, PHYSICAL

Doklady Physical Chemistry Pub Date : 2025-03-21 DOI:10.1134/S0012501624600220

Joon Hyuk Lee, Jungkun Song, Eunkyung Jeon, Jaeho Choi

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Abstract

High-performance polymers characterized by their exceptional thermal stability are crucial across various industries. Here, phthalonitrile resins have attracted significant attention due to their ability to form highly cross-linked networks upon curing, leading to outstanding properties suitable for demanding applications in aerospace, electronics, and automotive sectors. This study investigated the thermal curing kinetics and resulting thermal stability of phthalonitrile resins cured with 4,4'-diaminodiphenyl sulfone (DDS) and bisphenol A diglycidyl ether (DGEBA). Kissinger and Friedman methods were employed to analyze the curing process using thermogravimetric analysis data at various heating rates. The results revealed that DGEBA-cured networks exhibited higher thermal stability and activation energy compared to DDS-cured networks. This was attributed to the stronger C–O bonds formed in DGEBA networks. The higher bond dissociation energy of C–O bonds, arising from factors including electronegativity difference, bond length, orbital overlap, and hybridization necessitates a greater energy input for bond cleavage during thermal degradation. These findings highlight the critical role of curing agent selection in tailoring the thermal properties of phthalonitrile-based materials for high-performance applications.

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来源期刊

Doklady Physical Chemistry 化学-物理化学

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Doklady Physical Chemistry is a monthly journal containing English translations of current Russian research in physical chemistry from the Physical Chemistry sections of the Doklady Akademii Nauk (Proceedings of the Russian Academy of Sciences). The journal publishes the most significant new research in physical chemistry being done in Russia, thus ensuring its scientific priority. Doklady Physical Chemistry presents short preliminary accounts of the application of the state-of-the-art physical chemistry ideas and methods to the study of organic and inorganic compounds and macromolecules; polymeric, inorganic and composite materials as well as corresponding processes. The journal is intended for scientists in all fields of chemistry and in interdisciplinary sciences.