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Polyethylene-block-hyperbranched polyglycerol diblock copolymers: synthesis, thermal property and compatibilization

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Abstract

The linear-b-hyperbranched copolymers (LHBCs) consisting of linear polyethylene (PE) block and hyperbranched polyglycerol (hbPG) segment were synthesized with a sequential method starting with V(III)-catalyzed coordination polymerization and followed by ring-opening multibranching polymerization (ROMBP). The hydroxyl groups in hbPG block are further modified to benzoyl groups to improve the solubility. Ultimately, the structures and thermal properties of LHBCs were clearly characterized by 1H/13C NMR, GPC, TGA and DSC. The SEM images show that the LHBCs are effective compatibilizers in LLDPE/PCL blends. This paper represents the first case of generation of LHBCs combining hbPG with nonpolar and crystalline polyethylene block instead of polar and/or noncrystalline linear blocks. As a result, the crystallinity of linear polyethylene can be combined with low viscosity and a large number of terminal functional groups of hbPG.

The polyethylene-b-hyperbranched polyglycerol copolymers (PE-b-hbPG) were synthesized and characterized. The thermal and crystallization property of polyethylene can be combined with low viscosity and a large number of terminals of hbPG block. The SEM images showed that the compatibilization was determined by the hydrogen bonds between hbPG and PCL matrix, which was obviously different from the traditional compatibilizers.

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Acknowledgments

The authors are grateful for subsidy provided by the National Natural Science Foundation of China (Nos. 21204041), the Natural Science Foundation of Ningbo (2014 A610128), the Key Innovation Team of Zhejiang Province (2011R50001-12), K. C. Wong Education Foundation, and K. C. Wong Magna Fund, Hong Kong, are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Polymer Science and Engineering, Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, 315211, People’s Republic of China

    Zhongsu Liu, Fei Yang, Xuanhong Wu, Wenchong Zhang, Gejiong Zhu, Wei Li, Dirong Gong & Jingshan Mu

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  1. Zhongsu Liu
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  2. Fei Yang
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  3. Xuanhong Wu
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  4. Wenchong Zhang
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  5. Gejiong Zhu
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  6. Wei Li
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  7. Dirong Gong
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  8. Jingshan Mu
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Correspondence to Jingshan Mu.

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Liu, Z., Yang, F., Wu, X. et al. Polyethylene-block-hyperbranched polyglycerol diblock copolymers: synthesis, thermal property and compatibilization. J Polym Res 23, 143 (2016). https://doi.org/10.1007/s10965-016-1029-y

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  • DOI: https://doi.org/10.1007/s10965-016-1029-y

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