# Correlations between fiber-matrix micro-mechanical analysis and macroscale mechanical properties in PPS/basalt fibers composites designed from commingled yarns

I Castro-Cabrera, Baptiste Gaumond, Jean-François Gerard, Sébastien Livi, Jannick Rumeau-Duchet

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I Castro-Cabrera, Baptiste Gaumond, Jean-François Gerard, Sébastien Livi, Jannick Rumeau-Duchet. Correlations between fiber-matrix micro-mechanical analysis and macroscale mechanical properties in PPS/basalt fibers composites designed from commingled yarns. Eurofilles - Polymer Blends, Jan 2025, Villeurbanne (France), novembre 2007, France. hal-05304565

HAL Id: hal-05304565

https://hal.science/hal-05304565v1

Submitted on 8 Oct 2025

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# Correlations between fiber-matrix micro-mechanical analysis and macroscale mechanical properties in PPS/basalt fibers composites designed from commingled yarns

CASTRO-CABRERA I.ª, GAUMOND Bª, GERARD J. F.ª, LIVI S.ª, RUMEAU-DUCHET J.ª,

ªUMR CNRS 5223 Ingénierie des Matériaux Polymères, Université de Lyon, INSA Lyon, 20, Avenue Albert Einstein, 69621, Villeurbanne, France

## ABSTRACT

To reduce the environmental impacts of the transportation modes, the development of lightweight composite materials is crucial while maintaining the safety and performance of the various forms of transport and improving fuel economy. To answer to this challenge, PPS-based composites processed with basalt fibers could be highly relevant, especially when advanced manufacturing techniques such as the ones considering commingled yarns are used. In addition, basalt-based fiber-reinforced polymer composites (FRPCs) represent promising candidates for a variety of industrial applications according to the physical properties of basalt fibers. This work investigates the mechanical performances of PPS/basalt-based fiber yarns and their composites, aiming to bridge the gap between micro- and macro- scale mechanical behaviors. It highlights the key role of fiber-matrix interfaces by comparing basalt fibers with two different film former sizings, i.e polyamide and epoxy-unsaturated polyester. For a better understanding of the relationships between the two scales, different types of experiments, including surface analysis, micro-tensile testing, adhesion, wettability, and morphology assessments, were performed to characterize the performances at the micro-scale. Then, mechanical analyses were carried out on unidirectional composites such as interlaminar shear strength (ILSS) measurements to establish the relationships between these two scales. To complete this study, statistical analyses were performed leading to understand the defects mainly related to the processes. Finally, the results of this work provide valuable insights for guiding the development of high-performance composites processed from PPS-basalt commingled yarns.

**Keywords:** Thermoplastic composites, Basalt fibers, Interfaces, Sizing, Pull-out, Weibull, Commingled yarns, Adhesion

<figure><img src="image_1.png" /><figcaption>**Figure 1.** Cross sectional view of a) commingled yarns, and b) composite made from PPS and basalt fibers commingled yarns.</figcaption></figure>