Chemical Modification of Isotactic Polypropylene by Melt Blending

  • Kim, Jun-Young (Department of Fiber & Polymer Engineering, Center for Advanced Functional Polymers, Hanyang University) ;
  • Seo, Eun-Su (Department of Fiber & Polymer Engineering, Center for Advanced Functional Polymers, Hanyang University) ;
  • Park, Dae-Soon (Performance Material Division, 3M Korea Ltd.) ;
  • Park, Kwang-Min (PVC R&D Center, LG Chem. Ltd. Research Park) ;
  • Kang, Seong-Wook (Polymer Processing Technology Team, LG Chem. Ltd. Tech Center) ;
  • Lee, Chang-Hyung (Department of Medical Devices & Radiation Health, Korea Food & Drug Administration) ;
  • Kim, Seong-Hum (Department of Fiber & Polymer Engineering, Center for Advanced Functional Polymers, Hanyang University)
  • Published : 2003.09.01

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 the b-PP was increased with increasing the initiator content. On the introduction of the alkylamine as the branching agents the MFI of the b-PP was increased, while that of the b-PP with the pentaerythritol triacrylate (PT) was decreased. It may be caused by the chain scission of the i-PP backbone due to the reduced thermal stability of the i-PP on the melt blending. The MFI of the b-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 the b-PP was decreased. The crystallization temperature of the b-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 the b-PP.

Keywords

References

  1. B. K. Kim and C. H. Choi, J. Appl. Polym. Sci., 60, 2199-2206(1996) https://doi.org/10.1002/(SICI)1097-4628(19960620)60:12<2199::AID-APP18>3.0.CO;2-2
  2. B. K. Kim and I. H. Do, J. Appl. Polym. Sci., 61, 439-447 (1996) https://doi.org/10.1002/(SICI)1097-4628(19960718)61:3<439::AID-APP6>3.0.CO;2-J
  3. E. Borsig, A. Fielerova, and M. Lazar, J. Macromol Sci-Cem., A16, 513 (1981) https://doi.org/10.1080/00222338108058488
  4. J. L. Throne in 'Thermoforming', Hanser Publishers, Munich, Vienna, New York, 1987
  5. D. V. Rosato in 'Blow Molding Handbook', Hanser Pub-lishers, Munich, Vienna, New York, 1987
  6. J. N. McDonald in 'Encyclopedia of Polymer Science and Engineering', 2nd ed. (H. F. Mark, N. M. Bikales, C. G. Overberger, and G, Menges Eds.), Vol. 16, p.807, John Wiley & Sons Inc., New York, 1989
  7. E. Kokko, A. Malmberg, and J. V. Seppala, J. Polym. Sci., Part A, Polym. Chem., 38, 676 (2000)
  8. T. Noma, T. Murata, Y. Masubuchi, J. Takimoto, and K. Koyama, Polym. Prep. Jpn., 46, 3829 (1997)
  9. S. Lieber and H. H. Brintzinger, Macromolecules, 33, 9192–9199 (2000) https://doi.org/10.1021/ma000691j
  10. E. Kolodka, W. J. Wang, S. Zhu, arid A. E. Hamielec, Macromol. Rapid Commun., 23, 470-473 (2002) https://doi.org/10.1002/1521-3927(20020501)23:8<470::AID-MARC470>3.0.CO;2-3
  11. S. M. Gawish, A. Kantouch, A. M. EI-Naggar, and S. Mos-leh, J. Appl. Polym. Sci., 44, 1671-1677 (1992) https://doi.org/10.1002/app.1992.070440922
  12. E. A. Hegazy, Polymer, 33, 96-99 (1992) https://doi.org/10.1016/0032-3861(92)90565-E
  13. R. Rengarajan, M. Vicic, and S. Lee, Polymer, 30, 933-935 (1989) https://doi.org/10.1016/0032-3861(89)90195-X
  14. S. Lee, R. Rengarajan, and V. R. Parameswaran, J. Appl. Polym. Sci., 41, 1891-1894 (1990) https://doi.org/10.1002/app.1990.070410742
  15. Y. Pan, J. Ruan, and D. Zhou, J. Appl. Polym. Sci., 65, 1905-1912 (1997) https://doi.org/10.1002/(SICI)1097-4628(19970906)65:10<1905::AID-APP7>3.0.CO;2-J
  16. I. Chodak and M. Lazar, J. Appl. Polym. Sci., 32, 5431-5437 (1986) https://doi.org/10.1002/app.1986.070320615
  17. B. Wong and W. E. Baker, Polymer, 38, 2781-2789 (1997) https://doi.org/10.1016/S0032-3861(97)85615-7
  18. A. Laurent, C. M. Steven, and B. M. Robert, Polymer, 39, 2571-2577 (1998) https://doi.org/10.1016/S0032-3861(97)00584-3
  19. E. Borsig, E. Malcherova, and M. Lazar, Polym. Int., 30, 367-370 (1993) https://doi.org/10.1002/pi.4990300315
  20. M. Xanthos in 'Reactive Extrusion: Principles and Practice', New York, Hanser, 1992
  21. L. S. Huang, S. H. Goh, and S. H. Ong in 'The Chemistry of Free Radicals', London, Edward Arnold, 1973
  22. B. De Roover, M. Sclavons, V. Carlier, J. Devaux, R. Leg-ras, and A. Momtaz, J. Polym. Sci., Part A, Polym. Chem.,33, 829-842 (1995) https://doi.org/10.1002/pola.1995.080330509
  23. M. Sclavons, V. Carlier, J. B. De Roover, P. Franquinet, J. Devaux, and R. Legras, J. Appl. Polym. Sci., 62, 1205-1210 (1996) https://doi.org/10.1002/(SICI)1097-4628(19961121)62:8<1205::AID-APP10>3.0.CO;2-6
  24. X. Wang, C. Tzobanakis, and G. L. Rempel, J. Appl. Polym. Sci., 61, 1395-1404 (1996) https://doi.org/10.1002/(SICI)1097-4628(19960822)61:8<1395::AID-APP21>3.0.CO;2-X
  25. H. C. Kim and Y. D. Kong, Polym. Sci. Tech., 7, 59 (1996)
  26. R. P. Iliev, C. B. Park, G. Liu, and F. Liu, ANTEC, 934 (2000)
  27. V. V. DeMaio, D. Dong, and A. Gupta, ANTEC, 236 (2000)
  28. D. W. Yu, S. K. Dey, F. Pringgosusanto, and M. Xanthos, ANTEC, 596 (2000)
  29. P. J. Phillips and Y. H. Kao, Polymer, 27, 1679 (1986) https://doi.org/10.1016/0032-3861(86)90261-2
  30. R. M. Gohil and P. J. Phillips, Polymer, 27, 1687 (1986) https://doi.org/10.1016/0032-3861(86)90262-4
  31. A. J. DeNicola, A. F. Galambos, and M. D. Wolkowicz in 'Polymeric Materials Science and Engineering', ACS Fall Meeting, Vol. 67, p.106, Washington DC, USA, 1992
  32. F. Rybnikar, L. Pospisil, and J. Jankar, J. Mater. Sci. Lett., 9,499 (1990)
  33. A. R. Oromehie, S. A. Hashemi, I. G. Meldrum, and D. N. Waters, Polym. Int., 42, 117 (1997) https://doi.org/10.1002/(SICI)1097-0126(199701)42:1<117::AID-PI690>3.0.CO;2-N
  34. D. Shi, J. H. Yang, Z. H. Yao, Y. Wang, H. L. Huang, W. Jing, J. H. Yin, and G. Costa, Polymer, 42, 5549-5557 (2001) https://doi.org/10.1016/S0032-3861(01)00069-6
  35. Y. J. Sun, G. H. Hu, M. Lambla, and H. K. Kotlar, Polymer, 37, 4119 (1996) https://doi.org/10.1016/0032-3861(96)00229-7
  36. S. H. P. Bettini and J. A. M. Agnelli, Polym. Test., 19, 3-15 (2000) https://doi.org/10.1016/S0142-9418(98)00066-X