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Role of binding agent in microplastics
Summary
This study analyzed the role of the binding agent in fiber-reinforced microplastic composites, showing that the critical load-transfer length parameter governs how fiber bundle strength is realized in the composite material. Sizing that reduces this critical length increases the number of filament ruptures before failure and can strengthen the fiber's contribution to composite performance. Note: this paper concerns composite materials engineering, not environmental microplastic pollution.
1. It is shown to be advisable to use for the characteristic of the role of the binding agent in a microplastic thel cr parameter, the length of filament at which the growth of the stresses from zero at the point of repture to the mean value occurs. The strength of the fiber in the microplastic is equal to the strength of a bundle of filaments 2l cr long. In other words, the strength of the microplastic when extended along the filaments is governed by the strength of the reinforcing fiber and the binding agent ensures the realization of this strength. 2. The more marked is the scale effect in the strength of the original fiber and the smaller the magnitude ofl cr, the greater is the strengthening due to the sizing. 3. As the lengthl cr is reduced there is a rise in the number of ruptures of elementary filaments which may accumulate when the specimen is extended to failure. The experimental or calculated dependences of the number of ruptures on the stress applied to the fiber make it possible to evaluate the possible strengthening of the fiber when it is used as the reinforcing component of a composite material.