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Polypropylene block copolymer (PPco) is easier to process in extrusion-based additive manufacturing compared to isotactic PP homopolymer because it shrinks and warps less during printing. This study investigated the thermal properties of PPco and spray-dried CNF (SDCNF)-PPco composite pellet formulations. Thermogravimetric analysis data showed that the addition of SDCNF lowered the thermal degradation...
This study revealed the effects of spray-dried cellulose nanofibril (SDCNF) addition (3,10 and 30 wt%) and maleic anhydride polypropylene (MAPP) coupling agent (2 wt%) on the mechanical properties of polypropylene (PP). Results indicated that the elastic moduli of the PP composites increased as the SDCNF content increased above 10 wt%. The addition of MAPP into the SDCNF/PP composites did not improve...
Preparation of cellulose nanofibril (CNF)-reinforced, biodegradable polymer composites is challenging in that it’s hard to achieve good dispersion of the hydrophilic cellulose fibers in a hydrophobic polymer matrix. In this work, we developed a surfactant-free and efficient process to prepare CNF-reinforced poly (lactic acid) (PLA) composites from an aqueous dichloromethane Pickering emulsion self-emulsified...
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