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Abstract <p>An analysis of the mechanical properties and microstructure of glass (GFRP) and basalt (BFRP) fiber reinforced polymers demonstrates that their characteristics are determined by the type of reinforcing fiber and the method of curing a matrix. Experiments have shown that the thermoset GFRPs exhibit a high elastic modulus up to 50.5 GPa, flexural strength up to 1070 MPa, and microhardness up to 1.2 GPa due to their homogeneous structure and high-quality interface. The microwave-cured GFRPs have strength properties similar to those of the thermoset GFRPs, namely, an elastic modulus of up to 48.6 GPa and a flexural strength of up to 1072 MPa, but with slightly lower microhardness up to 0.97 GPa, which is related to the peculiarities of structure formation during volumetric heating. The microwave-cured BFRPs are found to have lower characteristics, namely, an elastic modulus of up to 37.4 GPa and a flexural strength up to 777&#xa0;MPa, and a large scatter of properties because of interfacial defects, high porosity, and structural heterogeneity. SEM studies have shown that the main differences in the mechanical parameters are related to the quality of adhesion and the uniformity of fiber distribution in the matrix. Microwave curing for GFRPs is shown to be an accelerated technology with the potential to achieve high properties comparable to those of thermal curing, and curing conditions for BFRPs need to be optimized to increase their quality and to expand fields of application.</p>

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Optimization of Microwave Curing Conditions and Mechanical Characteristics of Glass and Basalt Reinforcement

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • E. V. Matveev,
  • V. V. Berestov,
  • A. I. Gajdar,
  • A. A. Veveris

摘要

Abstract

An analysis of the mechanical properties and microstructure of glass (GFRP) and basalt (BFRP) fiber reinforced polymers demonstrates that their characteristics are determined by the type of reinforcing fiber and the method of curing a matrix. Experiments have shown that the thermoset GFRPs exhibit a high elastic modulus up to 50.5 GPa, flexural strength up to 1070 MPa, and microhardness up to 1.2 GPa due to their homogeneous structure and high-quality interface. The microwave-cured GFRPs have strength properties similar to those of the thermoset GFRPs, namely, an elastic modulus of up to 48.6 GPa and a flexural strength of up to 1072 MPa, but with slightly lower microhardness up to 0.97 GPa, which is related to the peculiarities of structure formation during volumetric heating. The microwave-cured BFRPs are found to have lower characteristics, namely, an elastic modulus of up to 37.4 GPa and a flexural strength up to 777 MPa, and a large scatter of properties because of interfacial defects, high porosity, and structural heterogeneity. SEM studies have shown that the main differences in the mechanical parameters are related to the quality of adhesion and the uniformity of fiber distribution in the matrix. Microwave curing for GFRPs is shown to be an accelerated technology with the potential to achieve high properties comparable to those of thermal curing, and curing conditions for BFRPs need to be optimized to increase their quality and to expand fields of application.