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Crystallization, structure, and properties of polypropylene random copolymer (PPR) / high-density polyethylene/polypropylene grafted maleic anhydride((HDPE/PP)-g-MAH) blends

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Abstract

Polypropylene/Polyethylene (PP/PE) incompatibility is the key factor that restricts the use of PE to further improve the performance of Polypropylene Random (PPR). Although there are many studies on PP/PE blends have been compatibilized by adding Maleic Anhydride (MAH) as a solubilizer, how MAH affects the crystal structure of PPR/PE blends has not been systematically investigated. This study compares the thermodynamic and crystallization behavior that adding of PPR and PPR blended with MAH-grafted PP and High-density polyethylene (HDPE). The addition of a small amount of (EP1:1)-MAH (MAH grafted PP/HDPE 1:1 blend) considerably enhanced the crystallization temperature of the system. Small-Angle X-ray Scattering (SAXS) confirmed that (EP1:1)-MAH has reduced the order of the lamellae structure of the PPR blend system compared with the addition of EP1:1 (ungrafted PP/PE 1:1 blend). MAH-grafted PE (PE-g-MAH) and MAH-grafted PP (PP-g-MAH) are compatible with PPR, thus allowing easy entry of PE into the phase region of PP and vice versa. By clarifying the crystal structure modification of PE/PPR blends, this study highlights the application potential of modifying PPR with the MAH-grafted polymer.

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Acknowledgements

This work is supported by a Liaoning climbing scholar program. In this work, the Beijing Synchrotron Radiation Facility (BSRF) 1W2A line station was used for synchrotron radiation characterization. We sincerely thank the scientists of BSRF line station, especially Dr. Moguang for their help.

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Authors and Affiliations

  1. Shenyang University of Technology, Shenyang, 110142, China

    Wenjun Shao, Ying Wang & Xia Hua

  2. Advanced Manufacturing Institute of Polymer Industry, Shenyang University of Chemical Technology, Shenyang, 110142, China

    Wenjun Shao, Lizhi Liu, Ying Wang, Xia Hua & Ying Shi

  3. Ningbo Nengzhiguang New Material Technology Co., Ltd. Ningbo 315800, Zhejiang, China

    Farao Zhang

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  1. Wenjun Shao
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Shao, W., Liu, L., Wang, Y. et al. Crystallization, structure, and properties of polypropylene random copolymer (PPR) / high-density polyethylene/polypropylene grafted maleic anhydride((HDPE/PP)-g-MAH) blends. J Polym Res 29, 354 (2022). https://doi.org/10.1007/s10965-022-03211-2

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