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Crystallization of polypropylene in the presence of biomass-based fillers of different compositions

Abstract : Natural fillers composed of cellulose, lignin and fillers with a varying lignin/cellulose ratio (flax, jute, curauà fibers and miscanthus stem fragments) were used to prepare composites with polypropylene using the same procedure, with or without a maleic anhydride–grafted polypropylene (MA-g-PP) coupling agent. A clear acceleration of the crystallization kinetics was observed in the presence of miscanthus stem fragments. For non-coupled composites, the size and aspect ratio of fragments had no significant influence onto the crystallization kinetics of polypropylene. The presence of the MA-g-PP coupling agent increased even more the kinetics. A clear effect of the nature of the polymers present in the filler was observed. There is a direct relationship between the values of the Avrami kinetic constant k for the six fillers and their lignin content, the more effective to enhance crystallization kinetics being pure cellulose. Lignin has no effect onto the crystallization kinetics of polypropylene.
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https://hal-mines-paristech.archives-ouvertes.fr/hal-01647757
Contributor : Magalie Prudon <>
Submitted on : Friday, November 24, 2017 - 3:19:42 PM
Last modification on : Wednesday, October 14, 2020 - 3:49:45 AM

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Jordi Girones, Jean-Marc Haudin, Lionel Freire, Patrick Navard, Thi To Loan Vo. Crystallization of polypropylene in the presence of biomass-based fillers of different compositions. Polymer, Elsevier, 2017, 127, pp.220 - 231. ⟨10.1016/j.polymer.2017.09.006⟩. ⟨hal-01647757⟩

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