Char to the Rescue : Processing and Transfer of Flame-Retardant Epoxy Resins, Adjusting the Fire Behavior and Post-Fire Structural Integrity of Glass Fiber Composites

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00009045
URN to cite this document: urn:nbn:de:bvb:703-epub-9045-5

Title data

Sunder, Sruthi ; Jauregui Rozo, Maria ; Deshpande, Harshal ; Neyer, Alexia ; Papaiya, Vinay ; Meinel, Dietmar ; Schartel, Bernhard ; Ruckdäschel, Holger:
Char to the Rescue : Processing and Transfer of Flame-Retardant Epoxy Resins, Adjusting the Fire Behavior and Post-Fire Structural Integrity of Glass Fiber Composites.
In: Journal of Polymer Science. Vol. 63 (2025) Issue 20 . - pp. 4295-4309.
ISSN 2642-4169
DOI der Verlagsversion: https://doi.org/10.1002/pol.20250692

	Format: PDF Name: Journal of Polymer Science - 2025 - Sunder - Char to the Rescue Processing and Transfer of Flame‐Retardant Epoxy Resins .pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
	Download (2MB)

Project information

Project title:	Project's official title Project's id Transfermechanismen vom flammgeschützten Polymerwerkstoff in den Faserkunststoffverbund: Flammschutz – Feuerwiderstand – Post-Fire Mechanik 466390889 Open Access Publizieren No information
Project financing:	Deutsche Forschungsgemeinschaft

Abstract

Epoxy (EP) glass fiber reinforced composites (GFRCs) are extensively used in structural applications due to their excellent thermal and mechanical properties, but their inherent flammability limits fire-safe deployment. While numerous studies examine the flame retardancy of resins or individual composite systems, comprehensive studies evaluating simultaneous improvements in flame retardancy and post-fire mechanical integrity, specifically through prepreg processing, remain challenging. This study investigates the effectiveness and transferability of phosphorus-based flame retardant (FR) systems to diglycidyl ether of bisphenol A (DGEBA) and EP novolac resin matrices and their corresponding bidirectional glass fiber composites via prepregs. The FRs are chosen based on varying modes of action: ammonium polyphosphate with inorganic silicate (APP/InSi) primarily acts in the condensed phase (CP), and aluminum diethyl phosphinate with zinc hydroxystannate (AldietPO2/ZHS) is known to demonstrate both gas-phase (GP) and CP activity. Fire residues are tailored to compensate for structural defects from fire exposure. EP novolac, with higher aromaticity and cross-linking, possesses better inherent flame resistance compared to DGEBA. The novolac composites containing AldietPO2/ZHS simultaneously showed the highest retention of flexural properties after fire exposure and the best fire safety index. The experimental values of the post-fire flexural properties in the composites calibrated damage parameters in two theoretical models.

Further data

Item Type:	Article in a journal
Keywords:	composites; DGEBA; epoxy novolac; post-fire; prepregs
DDC Subjects:	600 Technology, medicine, applied sciences > 620 Engineering
Institutions of the University:	Faculties > Faculty of Engineering Science > Chair Polymer Materials > Chair Polymer Materials - Univ.-Prof. Dr.-Ing. Holger Ruckdäschel Faculties Faculties > Faculty of Engineering Science Faculties > Faculty of Engineering Science > Chair Polymer Materials
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-9045-5
Date Deposited:	30 Mar 2026 10:44
Last Modified:	30 Mar 2026 10:44
URI:	https://epub.uni-bayreuth.de/id/eprint/9045

Download Statistics

Download Statistics

Download Statistics

Downloads

Downloads per month over past year