Journal
POLYMER TESTING
Volume 98, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2021.107189
Keywords
PP homopolymer; Fiber attrition; Interfacial adhesion; Acoustic emission; Fiber fracture
Funding
- National Research, Development and Innovation Fund of Hungary [OTKA K 120039, FK 129270]
- Ministry of Research, Technology and Higher Education of the Republic of Indonesia [002/SP2H/LT/MONO/L7/2019]
- Pro Progressio Foundation
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PP/sugarcane bagasse fiber composites were prepared by injection molding using two fractions of fibers with different particle characteristics, and their mechanical properties, local deformation processes, and interfacial adhesion were studied. The coupling can considerably improve interfacial adhesion and strength of the composites. Fiber fracture consumes energy, leading to an increase in impact resistance.
PP/sugarcane bagasse fiber composites were prepared by injection molding from two fractions of fibers with different particle characteristics. The mechanical properties of the composites were characterized by tensile and impact measurements, while local deformation processes by acoustic emission testing and microscopy. The determination of fiber dimensions after processing showed that considerable attrition takes place during melt processing in both the length and the diameter of the fibers. Interfacial adhesion can be improved considerably by coupling. The strength of adhesion was estimated quantitatively and adhesion was ten times stronger (1600 mJ/m(2)) in the presence of the coupling agent than without it (140 mJ/m(2)) leading to larger composite strength in the former case. Local deformation processes also change with the strength of adhesion, debonding dominates without the coupling agent, while fiber fracture takes place at good adhesion. Fiber fracture consumes energy that leads to an increase in impact resistance. The size of the fibers must be reduced in order to achieve better properties, but the application of coupling cannot be avoided even in that case.
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