Effect of Hemp Fiber on PET/Hemp Composites
The properties of polyethylene terephthalate (PET) reinforced with 1, 5, 10, 15 and 20% (w/w) alkaline-treated hemp fibers were investigated following a series of processing stages. The fiber concentration significantly impacts the compounding process, yielding thermostable composites
below 300°C. Their elastic moduli varied logarithmically with fiber concentration, and were increased by up to 20% with respect to the nonreinforced formulation. Such reinforcement was, however, followed by a drastic decrease in the elongation at break, from more than 20 mm for the unreinforced
PET to as low as 2.5 mm. Other properties showed closer observations to the variations of the elastic moduli. An appreciably good fiber-matrix interface was also observed; however the actual processing method could not take advantage of the fiber's length. This work has a major impact in the
development of composite biomaterials, as it extends their application range to the subexploited area of high-melting thermoplastic matrices reinforced with natural fibers.
Keywords: COMPOSITES; HEMP FIBERS; POLYETHYLENE TEREPHTHALATE (PET); PROPERTIES; THERMAL
Document Type: Research Article
Publication date: 01 December 2014
- This journal publishes high quality peer reviewed original research and review articles on macromolecules and additives obtained from renewable/biobased resources. Utilizing a multidisciplinary approach, JRM introduces cutting-edge research on biobased monomers, polymers, additives (both organic and inorganic), their blends and composites. JRM showcases both fundamental aspects and applications of renewable materials. The fundamental topics include the synthesis and polymerization of biobased monomers and macromonomers, the chemical modification of natural polymers, as well as the characterization, structure-property relationships, processing, recycling, bio and environmental degradation and life cycle analysis of the ensuing materials, in view of their potential applications. Within this sustainability approach, green chemistry processes and studies falling within biorefinery contexts are strongly favored.
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