Author(s):
1. Rebeka Lorber, FTPO, Slovenia
2. Miroslav Huskić, FTPO, Slovenia

Abstract:
Fibre-reinforced polymer composites are occupying a fair share of structural and lightweight applications, replacing traditional materials whenever possible. Along with many advantages they offer, such as excellent mechanical properties to weight ratio, low price, fast production, the possibility of tailoring the properties for specific applications, etc., on the other hand, at the end of their lifetime they are usually disposed on landfills. Carbon fibre polymer composites (CFRPs) are relatively expensive materials and should be considered for recycling and reuse. Therefore, the influence of multiple cycles of mechanical recycling through grinding and injection moulding was studied. PA66, PA66 reinforced with CF and ground CF were mechanically recycled five times. Mechanical and thermal properties were determined after the first injection, as well as after the 1st, 3rd and 5th cycles of mechanical recycling. The values of mechanical properties (modulus, strength, ..) generally deteriorate, while the thermal properties remain almost unchanged. Part of the change is due to polymer degradation and part is due to fibre shortening.

Key words:
mechanical recycling,carbon fibres,PA66,carbon fibre composites,injection moulding

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
30.07.2021.

Conference:
Contemporary Materials 2021 - Savremeni materijali

Applied paper from author