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A Biobased Blend of Cellulose Diacetate with Starch

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Abstract

Two bio-based polymers, cellulose diacetate (CDA) and starch, were used to prepare blends with reasonable properties and low cost. Due to the poor processing properties, starch was modified in the presence of glycerol and epoxidized soybean oil (ESO), and CDA was plasticized by triacetin (TA) and ESO, respectively. The morphologies of the blends with different amounts of modified starch (MST) were studied by scanning electron microscope (SEM), and the physical properties of the blends, including thermal stability, mechanical property, water and moisture resistance, were investigated. The equilibrium moisture absorption rates of the blends containing 30 and 50 wt% MST at 100 % of relative humidity(RH) were 9.4 and 15.0 %, respectively. SEM and DMA results demonstrated that CDA and MST had a certain extent of compatibility. Due to the partial plasticization of starch, the tensile strength of the blends was nearly not affected by the amount of MST. Even if 50 wt% MST was added, the tensile strength of the blend was as high as 24.7 MPa. The obtained blend containing 30 wt% MST can keep good mechanical properties at 50 % RH, and its tensile strength and elongation at break are 30.2 MPa and 3.6 %, respectively. All the results show that the CDA/MST blends have a potential as an environmental friendly material.

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Acknowledgments

This work was supported financially by the National Natural Science Foundation of China (51121001), the Excellent Youth Foundation of Sichuan (2011JQ0007), Program for Changjiang Scholars and Innovative Research Team in University of Ministry of Education of China(IRT1026), and the Program of International S & T Cooperation (2011DFA51420).

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Authors and Affiliations

  1. National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu, 610064, China

    Fei-Xiang Xia, Xiu-Li Wang, Fei Song & Yu-Zhong Wang

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  1. Fei-Xiang Xia
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  2. Xiu-Li Wang
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  3. Fei Song
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  4. Yu-Zhong Wang
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Correspondence to Xiu-Li Wang or Yu-Zhong Wang.

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Xia, FX., Wang, XL., Song, F. et al. A Biobased Blend of Cellulose Diacetate with Starch. J Polym Environ 20, 1103–1111 (2012). https://doi.org/10.1007/s10924-012-0535-1

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  • DOI: https://doi.org/10.1007/s10924-012-0535-1

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