Effects of different fibers on the properties of short-fiber-reinforced polypropylene composites

Most fiber types used show a reinforcing effect in accordance to the respective fiber properties. Comparison of different sizings and the use of a coupling agent show that fiber/matrix interaction has a significant impact on composite properties. A slight increase of the final fiber length can be achieved by using initially longer fibers. However, the results of this study indicate that a certain amount of adhesion is required for improving composite performance by increased fiber length.