Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 53, Issue 14, Pages 1010-1019Publisher
WILEY
DOI: 10.1002/polb.23729
Keywords
castor oil; Curaua nanocrystals; extrusion; green polyethylene; nanocomposites; Nanoparticles; Natural products; Polymers
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Funding
- CNPq (National Research Council, Brazil)
- FAPESP (The State of Sao Paulo Research Foundation, Brazil)
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Cellulose nanocrystals (CNC) were prepared from curaua fibers via acid hydrolysis, and used as reinforcing phase for high-density biopolyethylene (HDBPE) or green polyethylene. Castor oil (CO), epoxidized soybean oil (ESO) and epoxidized linseed oil (ELO) were chosen as compatibilizers for this study. Nanocomposites reinforced with CNC (3, 6, and 9 wt %) were processed by extrusion, using CO (3, 6, and 9 wt %) to evaluate its action as CNC dispersing agent in the HDBPE matrix. From the results obtained for these films, the CNC and oil contents were set at 3 wt%. In addition to CO, ELO, and ESO were also used, and besides processing by extrusion, extrusion/hot-pressing process was also considered, in order to compare the two processing techniques. The nanocomposites were characterized by microscopic, thermal, mechanical, and rheological analyses. The presence of oil leads to less opaque films and improved dispersion. (c) 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2015, 53, 1010-1019
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