{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,19]],"date-time":"2026-09-19T22:10:31Z","timestamp":1789855831240,"version":"4.0.1"},"reference-count":36,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T00:00:00Z","timestamp":1741046400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Central Guidance for Local Science and Technology Development Funds Project","award":["246Z1501G"],"award-info":[{"award-number":["246Z1501G"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Polymers"],"abstract":"<jats:p>Frontal polymerization (FP) technology has attracted significant attention as an efficient, low-energy curing method for thermosetting resins. By enabling self-sustaining polymerization reactions, FP significantly reduces curing time and minimizes external energy dependence, making it ideal for in-orbit manufacturing applications. In contrast to traditional curing methods, which are limited by high energy consumption and low efficiency, FP offers a more efficient and flexible alternative. Nonetheless, the FP process is sensitive to material composition, processing and environmental factors, requiring systematic studies to enhance performance. This work focuses on reaction mechanisms, curing kinetics and processing factors of a self-developed FP epoxy resin system. The revealed curing mechanism and kinetics reveals a high initiation energy barrier and rapid curing characteristics, showing appropriate reaction inertness before initiation and stable reaction without continuous external energy input. The influences of initiator concentration and epoxy resin type on polymerization rate and the properties of cured resin were examined. Additionally, a curing simulation method validated by the experiment were employed to analyze the effects of mold material, resin cross-sectional area, initial temperature and environmental conditions on polymerization behavior. The results provide valuable insights for optimizing FP, advancing the understanding of the curing process and improving resin performance in space-based applications.<\/jats:p>","DOI":"10.3390\/polym17050680","type":"journal-article","created":{"date-parts":[[2025,3,4]],"date-time":"2025-03-04T04:58:17Z","timestamp":1741064297000},"page":"680","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Frontal Polymerization of Epoxy Resins: Kinetic Modeling, Rate Regulation and Curing Process Simulation for Space Manufacturing Applications"],"prefix":"10.3390","volume":"17","author":[{"given":"Haisheng","family":"Wu","sequence":"first","affiliation":[{"name":"School of Materials Science and Engineering, Beihang University, Beijing 100191, China"},{"name":"Beijing Spacecrafts, Beijing 100094, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8614-5179","authenticated-orcid":false,"given":"Yizhuo","family":"Gu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beihang University, Beijing 100191, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinyu","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Materials Science and Engineering, Beihang University, Beijing 100191, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chaobo","family":"Xin","sequence":"additional","affiliation":[{"name":"Langfang Feize Composites Technology Co., Ltd., Langfang 065000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,4]]},"reference":[{"key":"ref_1","first-page":"51","article-title":"Review of space manufacturing technique and developments","volume":"47","author":"Wang","year":"2004","journal-title":"Sci. China-Phys. Mech. Astron."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"4123","DOI":"10.1007\/s00170-019-03786-z","article-title":"Additive manufacturing for space: Status and promises","volume":"105","author":"Sacco","year":"2019","journal-title":"Int. J. Adv. Manuf. Technol."},{"key":"ref_3","first-page":"11","article-title":"3D Printing applications for large-scale construction in space","volume":"21","author":"Zhang","year":"2024","journal-title":"Space Electron. Technol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"012001","DOI":"10.1088\/2515-7655\/ad02be","article-title":"3D printing of solid polymer electrolytes by fused filament fabrication: Challenges towards in-space manufacturing","volume":"6","author":"Bourseau","year":"2023","journal-title":"J. Phys. Energy"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Coughlin, N., Drake, B., Fjerstad, M., Schuster, E., Waege, T., Weerakkody, A., and Letcher, T. (2019). Development and mechanical properties of basalt fiber-reinforced acrylonitrile butadiene styrene for in-space manufacturing applications. J. Compos. Sci., 3.","DOI":"10.3390\/jcs3030089"},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Kaligar, A.B., Kumar, H.A., Ali, A., Abuzaid, W., Egilmez, M., Alkhader, M., Abed, F., and Alnaser, A.S. (2022). Femtosecond laser-based additive manufacturing: Current status and perspectives. Quantum Beam Sci., 6.","DOI":"10.3390\/qubs6010005"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Hoyt, R.P. (2013, January 10\u201312). SpiderFab: An architecture for self-fabricating space systems. Proceedings of the AIAA Space 2013 conference and exposition, San Diego, CA, USA.","DOI":"10.2514\/6.2013-5509"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Kantaros, A., Ganetsos, T., and Petrescu, F.I.T. (2024). Transforming object design and creation: Biomaterials and contemporary manufacturing leading the way. Biomimetics, 9.","DOI":"10.3390\/biomimetics9010048"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"3237","DOI":"10.1021\/acs.chemrev.2c00686","article-title":"Frontal polymerizations: From chemical perspectives to macroscopic properties and applications","volume":"123","author":"Suslick","year":"2023","journal-title":"Chem. Rev."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"073113","DOI":"10.1063\/5.0052821","article-title":"Rapid frontal polymerization achieved with thermally conductive metal strips","volume":"31","author":"Gao","year":"2021","journal-title":"Chaos"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"106931","DOI":"10.1016\/j.compositesa.2022.106931","article-title":"Rapid multiple-front polymerization of fiber-reinforced polymer composites","volume":"158","author":"Centellas","year":"2022","journal-title":"Compos. Part A-Appl. Sci. Manuf."},{"key":"ref_12","first-page":"1180","article-title":"On the phenomenon of polymerization reaction spreading","volume":"204","author":"Chechilo","year":"1972","journal-title":"Dokl. Akad. Nauk SSSR"},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Luo, T., Ma, Y., and Cui, X. (2024). Review on Frontal Polymerization Behavior for Thermosetting Resins: Materials, Modeling and Application. Polymers, 16.","DOI":"10.3390\/polym16020185"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"223","DOI":"10.1038\/s41586-018-0054-x","article-title":"Rapid energy-efficient manufacturing of polymers and composites via frontal polymerization","volume":"557","author":"Robertson","year":"2018","journal-title":"Nature"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"609","DOI":"10.1021\/acsmacrolett.7b00270","article-title":"Alkyl phosphite inhibitors for frontal ring-opening metathesis polymerization greatly increase pot life","volume":"6","author":"Robertson","year":"2017","journal-title":"ACS Macro Lett."},{"key":"ref_16","first-page":"697","article-title":"Progress of shape memory polymers and their composites in aerospace applications","volume":"41","author":"Li","year":"2020","journal-title":"J. Astronaut."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"025013","DOI":"10.1088\/1361-665X\/ac41ea","article-title":"Frontally polymerizable shape memory polymer for 3D printing of free-standing structures","volume":"31","author":"An","year":"2021","journal-title":"Smart Mater. Struct."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"40339","DOI":"10.1002\/app.40339","article-title":"Frontal cationic curing of epoxy resins in the presence of defoaming or expanding compounds","volume":"131","author":"Scognamillo","year":"2014","journal-title":"J. Appl. Polym. Sci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"228","DOI":"10.1016\/j.matlet.2016.04.103","article-title":"Fast curing of thick components of epoxy via modified UV-triggered frontal polymerization propagating horizontally","volume":"176","author":"Zhou","year":"2016","journal-title":"Mater. Lett."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"2066","DOI":"10.1002\/pola.20051","article-title":"UV-ignited frontal polymerization of an epoxy resin","volume":"42","author":"Mariani","year":"2004","journal-title":"J. Polym. Sci. Part A Polym. Chem."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"8161","DOI":"10.1039\/C5PY01451D","article-title":"Successful radical induced cationic frontal polymerization of epoxy-based monomers by C\u2013C labile compounds","volume":"6","author":"Bomze","year":"2015","journal-title":"Polym. Chem."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"1678","DOI":"10.1002\/pol.20210183","article-title":"Front velocity dependence on vinyl ether and initiator concentration in radical-induced cationic frontal polymerization of epoxies","volume":"59","author":"Groce","year":"2021","journal-title":"J. Polym. Sci."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"110009","DOI":"10.1016\/j.compscitech.2023.110009","article-title":"Thermal management in radical induced cationic frontal polymerisation for optimised processing of fibre reinforced polymers","volume":"237","author":"Staal","year":"2023","journal-title":"Compos. Sci. Technol."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"110190","DOI":"10.1016\/j.mtcomm.2024.110190","article-title":"Curing kinetics and thermal properties of [2,2] paracyclophane\/bisphthalonitrile-terminated imide resins","volume":"40","author":"Zhang","year":"2024","journal-title":"Mater. Today Commun."},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"113375","DOI":"10.1016\/j.eurpolymj.2024.113375","article-title":"Synthesis, curing kinetics and properties of novel aromatic multifunctional epoxy resin","volume":"219","author":"Zeng","year":"2024","journal-title":"Eur. Polym. J."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"178987","DOI":"10.1016\/j.tca.2021.178987","article-title":"The curing kinetics analysis of four epoxy resins using a diamine terminated polyether as curing agent","volume":"702","author":"Zhao","year":"2021","journal-title":"Thermochim. Acta"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"107783","DOI":"10.1016\/j.polymertesting.2022.107783","article-title":"Preparation, characterization, and curing kinetics of elevated and cryogenic temperature-resistant epoxy resin composites","volume":"116","author":"Bao","year":"2022","journal-title":"Polym. Test."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"31699","DOI":"10.1039\/D2RA05160E","article-title":"Renewable green reactive diluent for bisphenol a epoxy resin system: Curing kinetics and properties","volume":"12","author":"Li","year":"2022","journal-title":"RSC Adv."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"179768","DOI":"10.1016\/j.tca.2024.179768","article-title":"Comparative study of the kinetic behaviors and properties of aromatic and aliphatic bismaleimides","volume":"737","author":"Zhu","year":"2024","journal-title":"Thermochim. Acta"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"178629","DOI":"10.1016\/j.tca.2020.178629","article-title":"Synthesis, curing kinetics and thermal properties of two novel quinoxaline-based mono-and bismaleimides","volume":"689","author":"Wang","year":"2020","journal-title":"Thermochim. Acta"},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"126103","DOI":"10.1016\/j.polymer.2023.126103","article-title":"Phenolic resin\/coal char composites: Curing kinetics and thermal\/mechanical performance","volume":"281","author":"Zanjanijam","year":"2023","journal-title":"Polymer"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"2373","DOI":"10.1002\/pola.10317","article-title":"Cure kinetics of the ring-opening metathesis polymerization of dicyclopentadiene","volume":"40","author":"Kessler","year":"2002","journal-title":"J. Polym. Sci. Part A Polym. Chem."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"2100976","DOI":"10.1002\/mame.202100976","article-title":"Effect of a Dicycloaliphatic Epoxide on the Thermo-Mechanical Properties of Alkyl, Aryl Epoxide Monomers Cured via UV-Induced Cationic Frontal Polymerization","volume":"307","author":"Malik","year":"2022","journal-title":"Macromol. Mater. Eng."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"172","DOI":"10.1016\/j.polymer.2015.12.013","article-title":"Visible-light photopolymerization of DGEBA promoted by silsesquioxanes functionalized with cycloaliphatic epoxy groups","volume":"83","author":"Arenas","year":"2016","journal-title":"Polymer"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"491","DOI":"10.1016\/S0196-8904(00)00042-X","article-title":"Natural convective heat transfer coefficient\u2013a review: I. Isolated vertical and horizontal surfaces","volume":"42","author":"Khalifa","year":"2001","journal-title":"Energy Convers. Manag."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"2753","DOI":"10.1080\/014311698214497","article-title":"Classification-based emissivity for land surface temperature measurement from space","volume":"19","author":"Snyder","year":"1998","journal-title":"Int. J. Remote Sens."}],"container-title":["Polymers"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2073-4360\/17\/5\/680\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T16:46:40Z","timestamp":1760028400000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2073-4360\/17\/5\/680"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,3,4]]},"references-count":36,"journal-issue":{"issue":"5","published-online":{"date-parts":[[2025,3]]}},"alternative-id":["polym17050680"],"URL":"https:\/\/doi.org\/10.3390\/polym17050680","relation":{},"ISSN":["2073-4360"],"issn-type":[{"value":"2073-4360","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,3,4]]}}}