Abdullah, Che Ibrahim and Abd Rahman, Nor Mas Mira and Hassan, Aziz (2023) A pre-mold study of alkaline-silane treated EFB-PP composites based on thermal and rheological analysis. Journal of Applied Polymer Science, 140 (40). ISSN 1097-4628, DOI https://doi.org/10.1002/app.54489.
Full text not available from this repository.Abstract
Rheological and thermal properties are important parameters to understand the role of the numerous variables involved in manufacturing and to achieve a high-quality final product. The composites were prepared by compounding polypropylene (PP) with treated (alkaline and silane) oil-palm empty fruit bunch (EFB) fiber using a twin screw extruder. Generally, regardless of fiber loading, the thermal stability of EFBPP composites was increased after using alkaline and silane-treated EFB fibers as reinforcement. DSC analysis shows that there is a change in the melting temperature (T-m) and the degree of crystallinity (X-c) values of the EFB composites. The melt flow rate (MFR) of the composites decreased while viscosity increased with an increase in fiber loading. Rheological analysis reveals the composites to have a viscoelastic solid behavior where storage modulus (G') is greater than loss modulus (G''). The composites exhibit predominantly viscous behaviour (G'' > G') at lower frequencies, whereas at higher frequencies the composites exhibit elastic behavior (G' > G''). The decrement of complex viscosity (?*) with an increasing angular frequency (?) shows the materials exhibit shear thinning behavior. The composites also show the ability for regeneration when analyzed using time-dependent behavior.
| Item Type: | Article |
|---|---|
| Funders: | SATU [Grant no. ST043‐2021], Ministry of Higher Education, Malaysia [Grant no. FRGS/1/2022/STG04/UM/02/7], Universiti Malaya |
| Uncontrolled Keywords: | Alkaline; Silane treatment; Extrusion; Injection molding; Natural fiber composite; Rheology; Thermal properties |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 11 Oct 2025 09:06 |
| Last Modified: | 11 Oct 2025 09:06 |
| URI: | http://eprints.um.edu.my/id/eprint/48192 |
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