Preparation of Halogen-free Flame Retardant Polypropylene with Red Phosphorous and Mineral-based Flame Retardant

적린 및 무기계 난연제를 이용한 비할로겐계 난연성 폴리프로필렌의 제조

  • Sohn, Kwang-Ho (Department of Fire Protection Engineering, College of Engineering, Gimcheon University) ;
  • Kim, Min-Kwan (Department of Textile System Engineering, College of Engineering, Kyungpook National University) ;
  • Lee, Hong-Yeol (Department of Textile System Engineering, College of Engineering, Kyungpook National University) ;
  • Ji, Byung-Chul (Department of Textile System Engineering, College of Engineering, Kyungpook National University) ;
  • Ghim, Han-Do (Department of Textile System Engineering, College of Engineering, Kyungpook National University)
  • 손광호 (김천대학교 소방학과) ;
  • 김민관 (경북대학교 섬유시스템공학과) ;
  • 이홍렬 (경북대학교 섬유시스템공학과) ;
  • 지병철 (경북대학교 섬유시스템공학과) ;
  • 김한도 (경북대학교 섬유시스템공학과)
  • Received : 2011.03.11
  • Accepted : 2011.09.20
  • Published : 2011.10.28

Abstract

Polypropylene (PP) is one of the most widely used materials because of its rational mechanical characteristics. However, the application of PP is significantly limited and infrequent due to its easy combustion and dripping properties. To improve the thermal versatilities of PP, halogen-containing compounds, alone or in conjunction with antimony trioxide, have frequently been used in the flame retarding PPs. Halogen-containing flame retarding agents, however, are supposed to produce corrosiveness, smoke emissions, and toxicity which are combustion products. In this study, red phosphorous, metal oxides, and zinc borate were used as flame retarding agents for PP. The thermal properties of injection-molded PP specimens were characterized by thermogravimetric analysis, differential scanning calorimetry analysis, and UL94 flame retardation tests. Results showed that increased char formation on the surface can confirm flame retardation of the UL94 V0 grade of PP.

Keywords

Acknowledgement

Supported by : 중소기업청

References

  1. A. R. Horrocks, "Fire Retardant Materials", CRC Press Publishers, New York, 2000, pp.229-232.
  2. X. Chen, J. Yu, and S. Guo, "Structure and Properties of Polypropylene Composites Filled with Magnesium Hydroxide", J Appl Polym Sci, 2006, 102, 4943-4951. https://doi.org/10.1002/app.24938
  3. L. Yi, W. Wang, and W. Xiao, "The Effect of Decabromodiphenyl Oxide and Antimony Trioxide on the Flame Retardation of Ethylene-Propylene-diene Copolymer/Propylene Blends", Polym Deg Stab, 2004, 86, 69-73. https://doi.org/10.1016/j.polymdegradstab.2004.01.015
  4. F. Montezin, J. M. L. Cuesta, A. Crespy, and P. Georlette, "Flame Retardant and Mechanical Properties of a Copolymer PP/PE Containing Brominated Compounds /Antimony Trioxide Blends and Magnesium Hydroxide or Talc", Fire Mater, 1997, 21, 245-252. https://doi.org/10.1002/(SICI)1099-1018(199711/12)21:6<245::AID-FAM616>3.0.CO;2-F
  5. L. E. Sverdrup, T. Hartnik, E. Mariussen, and J. Jensen, "Toxicity of Three Halogenated Flame Retardants to Nitrifying Bacteria and a Soil Invertebrate", Chemosphere, 2006, 64, 96-103. https://doi.org/10.1016/j.chemosphere.2005.11.056
  6. H. Wichmann, F. T. Dettmer, and M. Bahadir, "Thermal Formation of PBDD/F from Tetrabromobisphenol A-A Comparison of Polymer Linked TBBP A with Its Additive Incorporation in Thermoplastics", Chemosphere, 2002, 47, 349-355. https://doi.org/10.1016/S0045-6535(01)00315-0
  7. N. Menad, B. Bjorkman, and E. G. Allain, "Combustion of Plastics Contained in Electric and Electronic Scrap", Resour Conserv Recycl, 1998, 24, 65-85. https://doi.org/10.1016/S0921-3449(98)00040-8
  8. M. Riess, T. Ernst, R. Popp, B. Muller, H. Thoma, O. Vierle, M. Wolf, and R. van Eldik, "Analysis of Flame Retarded Polymers and Recycling Materials", Chemosphere, 2000, 40, 937-941. https://doi.org/10.1016/S0045-6535(99)00336-7
  9. M. M. Modesti, A. Lorenzetti, F. Simioni, and G. Camino, "Expandable Graphite as an Intumescent Flame Retardant in Polyisocyanurate Polyurethane Foams", Polym Deg Stab, 2002, 77, 195-202. https://doi.org/10.1016/S0141-3910(02)00034-4
  10. F. Carpentier, S. Bourbigot, M. Le Bras and R. Delobel, "Rheological Investigations in Fire Retardancy Application to Ethylene-Vinyl-Acetate Copolymer-Magnesium Hydroxide/ Zinc Borate Formulations", Polym Int, 2000, 49, 1216-1221. https://doi.org/10.1002/1097-0126(200010)49:10<1216::AID-PI515>3.0.CO;2-S
  11. U. Hippi, J. Mattila, M. Korhonen, and J. Seppala, "Compatibilization of Polyethylene /Aluminum Hydroxide (PE/ATH) and Polyethylene /Magnesium Hydroxide (PE/ MH) Composites with Functionalized Polyethylenes", Polymer, 2003, 44, 1193-1201. https://doi.org/10.1016/S0032-3861(02)00856-X
  12. Z. Wang, G. Wu, Y. Hu, Y. Ding, K. Hu, and W. Fan, "Thermal Degradation of Magnesium Hydroxide and Red Phosphorus Flame Retarded Polyethylene Composites", Polym Deg Stab, 2002, 77, 427-434. https://doi.org/10.1016/S0141-3910(02)00099-X
  13. R. M. Aseeva and G. E. Zaikov, "Combustion of Polymer Materials", Hanser Publishers, New York, 1981, pp.229-241.
  14. A. D. France, L. Ferry, J. M. L. Cuesta, and A. Crespy, "Magnesium Hydroxide /Zinc Borate /Talc Compositions as Flame-Retardants in EVA Copolymer", Polym Int, 2000, 49, 1101-1105. https://doi.org/10.1002/1097-0126(200010)49:10<1101::AID-PI523>3.0.CO;2-5
  15. A. B. Shehata, "A New Cobalt Chelate as Flame Retardant for Polypropylene Filled with Magnesium Hydroxide", Polym Deg Stab, 2004, 85, 577-582. https://doi.org/10.1016/j.polymdegradstab.2004.01.019
  16. R. N. Rothon and P. R. Hornsby, "Flame Retardant Effects of Magnesium Hydroxide", Polym Deg Stab, 1996, 54, 383- 385. https://doi.org/10.1016/S0141-3910(96)00067-5
  17. M. Sain, S. H. Park, F. Suhara, and S. Law, "Flame Retardant and Mechanical Properties of Natural Fibre-PP Composites Containing Magnesium Hydroxide", Polym Deg Stab, 2004, 83, 363-367. https://doi.org/10.1016/S0141-3910(03)00280-5
  18. B. Garba, "Effect of Zinc Borate as Flame Retardant Formulation on Some Tropical Woods", Polym Deg Stab, 1999, 64, 517-522. https://doi.org/10.1016/S0141-3910(98)00136-0
  19. Y. Ning and S. Guo, "Flame-Retardant and Smoke- Suppressant Properties of Zinc Borate and Zluminum Trihydrate-filled Rigid PVC", J Appl Polym Sci, 2000, 77, 3119-3127. https://doi.org/10.1002/1097-4628(20000929)77:14<3119::AID-APP130>3.0.CO;2-N
  20. E. D. Weil and N. G. Patel, "Iron Compounds in Non- Halogen Flame-Retardant Polyamide Systems", Polym Deg Stab, 2003, 82, 291-296. https://doi.org/10.1016/S0141-3910(03)00183-6
  21. H. Pi, S. Guo, and Y. Ning, "Mechanochemical Improvement of the Flame-Retardant and Mechanical Properties of Zinc Borate and Zinc Borate-Aluminum Trihydrate-filled Poly (vinyl chloride)", J Appl Polym Sci, 2003, 89, 753-762. https://doi.org/10.1002/app.12202
  22. Z. Wu, W. Shu, and Y. Hu, "Synergist Flame Retarding Effect of Ultrafine Zinc Borate on LDPE/IFR System", J Appl Polym Sci, 2007, 103, 3667-3674. https://doi.org/10.1002/app.25575
  23. C. A. Giudice and J. C. Benitez, "Zinc Borates as Flame- Retardant Pigments in Chlorine-containing Coatings", Prog Org Coat, 2001, 42, 82-88. https://doi.org/10.1016/S0300-9440(01)00159-X
  24. K. K. Shen in "Fire and Polymers" (G. L. Nelson and C. A. Wilkie Eds.), ACS, Washington DC, 2001, pp.228-239.
  25. B. Qu and R. Xie, "Intumescent Char Structures and Flame Retardant Mechanism of Expandable Graphite-based Halogen-free Flame Retardant Linear Low Density Polyethylene Blends", Polym Int, 2003, 54, 1415-1422.
  26. H. Demir, E. Arkis, D. Balkose, and S. Ulku, "Synergistic Effect of Natural Zeolites on Flame Retardant Additives", Polym Deg Stab, 2005, 89, 478-483. https://doi.org/10.1016/j.polymdegradstab.2005.01.028