Utilization of flours from hemp stalks as reinforcement in polypropylene matrix

Author:

Kılıç İbrahim1,Avcı Büşra2,Atar İlkay2,Korkmaz Nesrin3,Yılmaz Güngör4,Mengeloğlu Fatih2

Affiliation:

1. Department of Material and Energy, Hemp Research Institute, Yozgat Bozok University, Yozgat, Turkey

2. Department of Forest Industry Engineering, Kahramanmaras Sutcu Imam University, Kahramanmaras, Turkey

3. Department of Basic Sciences and Health, Hemp Research Institute, Yozgat Bozok University, Yozgat, Turkey

4. Department of Field Crops, Yozgat Bozok University, Yozgat, Turkey

Abstract

Utilization of hemp stalks (HS) was investigated as filler and maleic anhydride-grafted polypropylene (MAPP) as a coupling agent relative to some mechanical, physical, morphological, and thermal properties of polypropylene (PP) composites. The test sample manufacturing used 10, 15, 20, 25, 30, and 35 wt% of HS and 0 wt% or 3 wt% of MAPP. Test specimens were manufactured by combining extrusion and injection molding processes. Results showed that incorporating filler and MAPP increased the mechanical properties significantly. The utilization of HS filler or MAPP provided an improvement of 11.7% (samples containing 35 wt% HS and 3 wt% MAPP) improvement in tensile strength, 44.2% (samples containing 35 wt% HS and 3 wt% MAPP) in flexural strength, and 60.2% (samples containing 30 wt% HS and 0 wt% MAPP) in impact strength compared to neat PP. The scanning electron microscopy analysis provided visual evidence that MAPP improved adhesion between the filler and the polymer matrix. This study showed that using hemp stalks in composite manufacturing provided good overall properties.

Publisher

BioResources

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