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The Crystallization, Melting Behaviors and Thermal Stability of Cross-linked Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Octavinyloctasilasesquioxane

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Abstract

A series of cross-linked poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/octavinyloctasilasesquioxane (PHBV/OVS) composites were obtained by a simple melt reactive processing technique. Dicumyl peroxide (DCP) and OVS were employed as a free radical initiator and a cross-linking agent, respectively. The chemical structure of these produced composites were identified by 1H/13C/29Si-nuclear magnetic resonance spectroscopy (1H/13C/29Si-NMR) and Fourier transform infrared spectroscopy (FTIR). The melting behavior, non-isothermal crystallization, spherulite morphology and thermal stability property of PHBV/OVS composites were also investigated. The nucleation behaviors and crystallization rate of PHBV/OVS were significantly enhanced with the formation of cross-linked networks with different side-chains and cross-linking points. The red shift of crystalline peak temperature with addition of a small amount of OVS content evidenced the higher crystalline ability compared with the neat PHBV. However there was a threshold content, beyond which the crystallization rate weakened again. Additionally, the cross-linked structure of PHBV/OVS composites could be adjusted by changing the amount of OVS.

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Acknowledgments

The authors gratefully acknowledge the support of the National Natural Science Foundation of China (No. 51603033), the Fundamental Research Funds for the Central Universities (Nos. 2232018A3-01 and 2232018D3-03), the Program for Innovative Research Team in University of Ministry of Education of China (No. IRT16R13) and the Open Foundation of Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Zhejiang Sci-Tech University), Education Ministry of China (No. 2017001).

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Authors and Affiliations

  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620, China

    Heng-Xue Xiang, Fatemeh Zabihi & Mei-Fang Zhu

  2. The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou, 310018, China

    Xu-Zhen Zhang

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  1. Heng-Xue Xiang
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  2. Fatemeh Zabihi
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  3. Xu-Zhen Zhang
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  4. Mei-Fang Zhu
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Correspondence to Mei-Fang Zhu.

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Xiang, HX., Zabihi, F., Zhang, XZ. et al. The Crystallization, Melting Behaviors and Thermal Stability of Cross-linked Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) by Octavinyloctasilasesquioxane. Chin J Polym Sci 36, 1353–1360 (2018). https://doi.org/10.1007/s10118-018-2157-0

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