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Polymers 2018, 10(11), 1284; https://doi.org/10.3390/polym10111284

Isothermal Crystallization and Rheology Properties of Isotactic Polypropylene/Bacterial Cellulose Composite

1
School of Chemistry and Biological Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
2
Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
3
Shanxi Provincial Institute of Chemical Industry, Shanxi 030021, China
4
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiang Tan 411201, China
5
Guangzhou Fibre Product Testing and Research Institute, Guangzhou 510220, China
*
Authors to whom correspondence should be addressed.
Received: 15 October 2018 / Revised: 15 November 2018 / Accepted: 15 November 2018 / Published: 18 November 2018
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Abstract

Bacterial cellulose (BC) is a new kind of cellulose with great potential in enhancing preparation of isotactic Polypropylene (iPP) composites, which have been found with excellent performance. However, the interface compatibility between BC and iPP is poor. In this study, iPP/BC composites were prepared by solution mixing. Esterification modified BC (CO) and Maleic anhydride grafted polypropylene (MAPP) added as a compatibilizer was both used to improve the interfacial compatibility of the iPP/BC composites. The rheology and isothermal crystallization behavior of the composites was tested and discussed. The result shows that the complex viscosity and storage modulus of the composite significantly increase in the rule iPP, iPP/BC2, iPP/CO2, and M-iPP/BC3, which indicates that the compatibility of the composite increases as this rule. According to the isothermal crystallization kinetics result, the crystal growth mode of iPP was not affected by the addition of BC and the interfacial compatibility. The spherulite growth rate of the iPP/BC composite increases with increasing crystallization temperature. Especially, the value decreases as the same rule with the complex viscosity and storage modulus of the composite at the same isothermal crystallization temperature. These results suggest that the interface compatibility of iPP/BC composites is greatly improved and the interface compatibility of the M-iPP/BC3 is better than the iPP/CO2. View Full-Text
Keywords: Isotactic polypropylene; bacterial cellulose; rheology; isothermal crystallization Isotactic polypropylene; bacterial cellulose; rheology; isothermal crystallization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Wang, B.; Lin, F.-H.; Li, X.-Y.; Zhang, Z.-W.; Xue, X.-R.; Liu, S.-X.; Ji, X.-R.; Yu, Q.; Yuan, Z.-Q.; Chen, X.-D.; Luo, J. Isothermal Crystallization and Rheology Properties of Isotactic Polypropylene/Bacterial Cellulose Composite. Polymers 2018, 10, 1284.

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