Utilization of carpet waste as a matrix in natural filler filled engineering thermoplastic composites for automotive applications

Abstract

Recycled nylon 6, 6 from carpet waste is a potential material for use in the production of composites. There has also recently been increased interest in the use of natural fillers in numerous automotive interior and exterior parts. The aim of this proposed research is to explore the use of carpet waste, recycled nylon 6, 6 (RPA 6, 6) and natural filler (microcrystalline cellulose (MCC)) for certain under-the-hood applications in the automobile industry where conditions are too severe for commodity plastics to withstand. In this study, engineering thermoplastic composites were fabricated that were reinforced with MCC at up to 30 percent MCC to RPA 6, 6 weight ratios. The tensile strength increased by 110% at 20 wt. % of MCC loading level. Tensile and flexural modulus of elasticity increased with the addition of microcrystalline cellulose. Incorporation of MCC particles into RPA 6, 6 also resulted in a considerable decrease of creep compliance. Differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) were used to determine thermal properties of the composites. The thermal expansion of the composites also decreased with increased filler loading. The mechanical and thermal properties of the composites suggest that composite components could be especially relevant in thermally challenging areas such as the manufacture of under-the-hood automotive parts. © 2013 Elsevier B.V., All rights reserved.