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Degradation Mechanisms of Polymer Composites Under Extreme Weather

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Composites and Nanocomposites".

Deadline for manuscript submissions: 30 September 2026 | Viewed by 1037

Special Issue Editors


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Guest Editor
Centre for Future Materials, University of Southern Queensland, West Street, Toowoomba, QLD 4300, Australia
Interests: civil composites; resilient infrastructure; low-carbon concrete; materials durability; structural testing; finite element simulation

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Guest Editor
Innovative Fire and Façade Engineering Group, School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
Interests: FRP; nanocomposite; fire; construction materials; waste in construction
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Guest Editor
Department of Civil and Building Engineering, University of Sherbrooke, Sherbrooke, QC J1K 2R1, Canada
Interests: FRP; polymer composite; construction materials; mechanical properties

Special Issue Information

Dear Colleagues,

The use of polymer composites has grown exponentially in modern construction as a new cost-effective alternative to conventional materials like timber, steel and concrete. In civil infrastructure and building applications, polymer composites are exposed to aggressive environmental conditions, including solar ultraviolet (UV) radiation, elevated in-service temperature, high moisture, and combinations of all of these. The durability and long-term performance of polymer composites under extreme climatic conditions have been the subject of numerous studies, both in the laboratory and in the field. Moreover, recent ongoing efforts in developing and innovating polymer composites have focused on using new fibres, high-performance resin systems with low permeability, and new functional particulate fillers. These advanced materials are expected to yield benefits over existing composite products, while being significantly more cost-effective; however, there is a need to verify the durability of these new and emerging polymer materials.

This Special Issue aims to gather recent advancements and new knowledge about the long-term performance and durability of polymer composites under different environmental conditions, with special focus on the interaction of different degradation mechanisms and the fire resistance of advanced polymer materials, as well as on the understanding and modelling of degradation mechanisms and new rigorous methods for predicting polymer composites performance in terms of constituents, sections, components, and structural members.

Prof. Dr. Allan Manalo
Prof. Dr. Kate Nguyen
Prof. Dr. Brahim Benmokrane
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • degradation mechanisms
  • polymer composites
  • materials durability
  • nanocomposite
  • FRP

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Published Papers (1 paper)

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Research

31 pages, 13978 KB  
Article
Hygrothermal Ageing of Glass and Carbon Fibre Composites Manufactured Using Different Resin Systems
by Zaneta Senselova, Allan Manalo, Abdullah Iftikhar, Omar Alajarmeh, Saya Ramakrishnan, Hiroki Sakuraba, Kate Nguyen and Brahim Benmokrane
Polymers 2026, 18(6), 696; https://doi.org/10.3390/polym18060696 - 12 Mar 2026
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Abstract
This study investigates the degradation mechanisms of glass-fibre- and carbon-fibre-reinforced polymer (GFRP and CFRP, respectively) composites fabricated either with epoxy, vinyl-ester, or bio-epoxy resins under a hygrothermal environment. Composite laminates were manufactured using the vacuum-assisted resin infusion technique and exposed to high moisture [...] Read more.
This study investigates the degradation mechanisms of glass-fibre- and carbon-fibre-reinforced polymer (GFRP and CFRP, respectively) composites fabricated either with epoxy, vinyl-ester, or bio-epoxy resins under a hygrothermal environment. Composite laminates were manufactured using the vacuum-assisted resin infusion technique and exposed to high moisture and elevated in-service temperatures of 23 °C (room temperature), 40 °C and 60 °C for up to 125 days. Changes in the physical, microstructural, chemical and mechanical properties were then assessed. CFRP and GFRP composites showed distinct differences in their hygrothermal ageing depending on the resin system used in the manufacturing. CFRP composites consistently demonstrated higher stability than GFRP composites. Epoxy resin exhibited high resistance to water absorption and hydrolysis under hygrothermal exposure. After 125 days at 60 °C, glass/epoxy (GE) and carbon/epoxy (CE) composites retained 79.0% and 72.1% of their tensile strength and 46.9% and 72.6% of their interlaminar shear strength (ILSS), respectively. Vinyl-ester composites showed high mechanical retention, with glass/vinyl-ester (GV) and carbon/vinyl-ester (CV) retaining 70.8% and 83.1% of tensile strength and 67.5% and 80.3% of ILSS, respectively. Despite this mechanical stability, evidence of hydrolysis indicated ongoing chemical degradation of the vinyl-ester resin under prolonged hygrothermal exposure. In contrast, bio-epoxy composites exhibited relatively low overall durability. Glass/bio-epoxy (GB) retained 126.5% tensile strength and 68.8% ILSS, whereas carbon/bio-epoxy retained 61.0% tensile strength and 44.3% ILSS after 125 days at 60 °C. Overall, fibre and resin types were found to have a significant effect on the hygrothermal ageing of polymer composites. Full article
(This article belongs to the Special Issue Degradation Mechanisms of Polymer Composites Under Extreme Weather)
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