Facile method to enhance the optical properties of transparent glass fiber-reinforced epoxy composites by controlling the curing agent content ratio

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY Composites Part B: Engineering Pub Date : 2025-03-12 DOI:10.1016/j.compositesb.2025.112402

Dong-Kyu Kim , Young Ho Choi , Kwan-Woo Kim , Byung-Joo Kim

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Abstract

In this study, the refractive index of epoxy resin was adjusted according to the mixing ratio of two types of curing agents, namely 4,4′-diaminodiphenylmethane and poly(propylene glycol) bis(2-aminopropyl ether). The optical properties of the cured pure polymers and transparent glass fiber-reinforced plastics (GFRP)¹ (analyzed with an ultraviolet–visible spectrophotometer) were compared. Epoxy (EP)/P9D1-F exhibited excellent optical properties (transmittance of 89.54 % and a haze of 9.30 %). The small refractive index difference between EP/P9D1 and glass fiber reduced the phase delay and fabricated high-transmittance, transparent GFRP. In addition, EP/P9D1-F exhibited superior mechanical properties, with enhanced flexural strength and fracture toughness owing to the improved stress distribution between the fiber and matrix. These findings suggest that a transparent GFRP with high transmittance and glass-like optical properties, as well as excellent mechanical performance, can be fabricated by appropriately mixing and adjusting two or more types of curing agents.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.