Flax fiber reinforced polypropylene with increased CHARPY impact strength by the use of potential adhesives
One challenge while processing natural fiber reinforced plastics is the creation of adhesion between fiber and matrix. While natural fibers are hydrophilic, many common plastics like polypropylene and polyethylene behave hydrophobic. To overcome this incompatibility of fiber and matrix, coupling agents which interact physically or chemically with the two components are used. In experiments at the Institute for Polymer Materials and Plastic Engineering (PuK) at Clausthal University of Technology, three drendritic polyesters were used as coupling agents for flax fiber and polypropylene. By the use of this treatment, the CHARPY impact strength of the composites could be significantly increased.
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