Journal
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Volume 56, Issue 12, Pages 935-946Publisher
WILEY
DOI: 10.1002/polb.24610
Keywords
3D printing; differential scanning calorimetry; nano-indentation; postpolymerization; stereolithography
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Funding
- Fundamental Research Funds for the Central Universities [2572015AB23, 2572015AB03]
- Soft Materials Research in Tennessee (SMART)
- Tennessee Experimental Station Project [TEN00510]
- China Scholarship Council [201606600031, 201506600011]
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Cellulose nanocrystal (CNC) reinforced methacrylate (MA) resin nanocomposite was prepared by 3D stereolithography printing. A postcure process, where the printed nanocomposite was heat-treated under different temperatures, was applied to improve the property of the printed nanocomposites. To investigate the effect of CNC and postcure temperature on the kinetic behavior of the postpolymerization of printed nanocomposites, Fourier-transform infrared spectroscopy and differential scanning calorimetry measurement of the printed nanocomposites before and after postcure were analyzed. The postpolymerization of MA nanocomposites was promoted at a postcure temperature of 140 degrees C for the printed 0.5% CNC/MA nanocomposites compared to the printed MA resin. The addition of CNC retarded the polymerization of MA resin during 3D printing, resulting in poorer mechanical properties of the printed nanocomposites compared to the printed MA resin. However, after postcure, the mechanical properties of the printed nanocomposites were improved by the postpolymerization of the MA nanocomposites. (C) 2018 Wiley Periodicals, Inc.
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