Fibers and Polymers

, Volume 4, Issue 3, pp 107–113 | Cite as

Chemical modification of isotactic polypropylene by melt blending

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


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.


Branching Gel content Isotactic polypropylene Melt strength 


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Copyright information

© The Korean Fiber Society 2003

Authors and Affiliations

  • Jun Young Kim
    • 1
  • Eun Su Seo
    • 1
  • Dae Soon Park
    • 2
    • 1
  • Kwang Min Park
    • 3
    • 1
  • Seong Wook Kang
    • 4
    • 1
  • Chang Hyung Lee
    • 5
    • 1
  • Seong Hun Kim
    • 1
  1. 1.Department of Fiber & Polymer Engineering, Center for Advanced Functional PolymersHanyang UniversitySeoulKorea
  2. 2.Performance Material DivisionKyonggi-DoKorea
  3. 3.PVC R&D CenterYu Seong, Science Town DaejeonKorea
  4. 4.Polymer Processing Technology TeamLG Chem. Ltd. Tech CenterDaejeonKorea
  5. 5.Department of Medical Devices & Radiation HealthKorea Food & Drug AdministrationSeoulKorea

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