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01.02.2014 | Original Paper

Novel high-strength, micro fibrillated cellulose-reinforced polypropylene composites using a cationic polymer as compatibilizer

verfasst von: Katsuhito Suzuki, Akihiro Sato, Hiroaki Okumura, Tadafumi Hashimoto, Antonio Norio Nakagaito, Hiroyuki Yano

Erschienen in: Cellulose | Ausgabe 1/2014

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Abstract

Novel high-strength, micro-fibrillated cellulose (MFC)-reinforced polypropylene (PP) composites were prepared using maleic anhydride polypropylene (MAPP) and a cationic polymer having a primary amino group (CPPA) as coupling agents. Un-dried kraft pulp was micro-fibrillated into nano- to submicron-wide fibrils by kneading with powdered PP and the coupling agents via a twin-screw extruder. The composites were prepared by injection molding. The MFC-reinforced PP composites containing both coupling agents MAPP and CPPA (combination system) showed extremely high mechanical strength compared with the MFC-reinforced composite containing only MAPP. The tensile strength of a 30 wt% MFC-PP composite containing the combination system was 27 % higher than that of the composite containing only MAPP, and more than 60 % higher than that of neat PP. In addition, the heat distortion temperature, under a 1.82-MPa flexural load, of the composite with the combination system was 17 °C higher than that of the composite with MAPP only, and 34 °C higher than that of neat PP. The anisotropy of the modulus and strength in the injection-molded MFC composites was lower than that of glass fiber-reinforced PP.

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Titel: Novel high-strength, micro fibrillated cellulose-reinforced polypropylene composites using a cationic polymer as compatibilizer
verfasst von: Katsuhito Suzuki
Akihiro Sato
Hiroaki Okumura
Tadafumi Hashimoto
Antonio Norio Nakagaito
Hiroyuki Yano
Publikationsdatum: 01.02.2014
Verlag: Springer Netherlands
Erschienen in: Cellulose / Ausgabe 1/2014
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI: https://doi.org/10.1007/s10570-013-0143-9

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