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Chemical modification of isotactic polypropylene by melt blending

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Abstract

The branched polypropylene (b-PP) was prepared by melt blending process with initiator, antioxidant, and functional monomers to improve the melt strength through the melt grafting. The melt flow index (MFI) of theb-PP was increased with increasing the initiator content. On the introduction of the alkylamine as the branching agents the MFI of theb-PP was increased, while that of theb-PP with the pentaerythritol triacrylate (PT) was decreased. It may be caused by the chain scission of thei-PP backbone due to the reduced thermal stability of thei-PP on the melt blending. The MFI of theb-PP without the antioxidant was increased due to the chain scission occurred during the melt processing, while on the introduction of the antioxidant, the MFI of theb-PP was decreased. The crystallization temperature of theb-PP was higher than that of PP, which was attributed to the branched chain structure. It was found that the PT was the most effective functional monomers for enhancing the melt properties of theb-PP.

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Authors and Affiliations

  1. Department of Fiber & Polymer Engineering, Center for Advanced Functional Polymers, Hanyang University, 133-791, Seoul, Korea

    Jun Young Kim, Eun Su Seo, Dae Soon Park, Kwang Min Park, Seong Wook Kang, Chang Hyung Lee & Seong Hun Kim

  2. Performance Material Division, 3M Korea Ltd., 374-5 Pyongjom-Ri, Taean-Eup, Hwasung-Si, 445-974, Kyonggi-Do, Korea

    Dae Soon Park

  3. PVC R&D Center, LG Chem. Ltd. Research Park, P.O. Box 61, 305-380, Yu Seong, Science Town Daejeon, Korea

    Kwang Min Park

  4. Polymer Processing Technology Team, LG Chem. Ltd. Tech Center, 84 Jangdong, Yusung-gu, 305-380, Daejeon, Korea

    Seong Wook Kang

  5. Department of Medical Devices & Radiation Health, Korea Food & Drug Administration, 5 Nokbeon-dong, Eunpyung-gu, 122-704, Seoul, Korea

    Chang Hyung Lee

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  1. Jun Young Kim
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  2. Eun Su Seo
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Correspondence to Seong Hun Kim.

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Kim, J.Y., Seo, E.S., Park, D.S. et al. Chemical modification of isotactic polypropylene by melt blending. Fibers Polym 4, 107–113 (2003). https://doi.org/10.1007/BF02875456

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  • DOI: https://doi.org/10.1007/BF02875456

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