One strategy for improving the cost efficiency as well as techno-functional properties of bio based plastics is the incorporation of natural fillers. In this study, potato pulp was used as a compound additive in different concentrations in extruded biopolymer blends based on glycerol/water plasticized whey protein isolate and polybutylene succinate. The main goal of this work was to determine the influence of potato pulp on the thermoplastic process as well as on the techno-functional properties of whey protein isolate/polybutylene succinate blends. When increasing the potato pulp concentration the elongation at break decreased, Young's modulus increased and the tensile strength was not affected.
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Schmid et al. (2015) studied this question.
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