Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Preparation and Properties of Polymer PTC Composites for Process Safety

공정안전용 Polymer PTC 소재의 제조 및 특성

  • 강영구 (호서대학교 안전시스템공학과) ;
  • 조명호 (호서대학교 대학원 안전공학과)
  • Published : 2003.09.01
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Abstract

Polymeric positive temperature coefficient(PTC) composites have been prepared by incorporating carbon black(CB) into high density polyethylene(HDPE), polyphenylene sulfide(PPS) and polybutylene terephthalate(PBT) matrices. A PTC effect was observed in the composite, caused by the large thermal expansion due to He consecutive melting of HDPE, PPS and PBT crystallites. This theory is based upon the premise that the PTC phenomenon is due to a critical separation distance between carbon particles in the polymer matrix at the higher temperature. The influence of PTC characteristics of the PPS/CB composite can be explained by DSC result. HDPE, one of prepared composition, exhibit the higher performance PTC behavior that decreaseing of negative temperature coefficient(NTC) effect and improved reproducibility by chemically crosslinking. Also, PBT/CB and PPS/CB composites exhibit the higher PTC peack temperature than HDPE/CB PTC composite, individually $200^{\circ}C$ and $230^{\circ}C$. These PTC composite put to good use in a number of safety application, such as self$.$controlled heater, over-current protectors, auto resettable switch, high temperature proctection sensor, etc.

Keywords

References

  1. A. E. Job, F. A. Oliveira, N. Alves, J. A. Giacometti, L. H. C. Mattoso, 'Conductive composites of natural rubber and carbon black for pressure sensors,' Synthetic Metals, Vol. 135-136, pp. 99-100, 2003 https://doi.org/10.1016/S0379-6779(02)00866-4
  2. C. Schmitt, M. Lebienvenu, 'Electrostatic painting of conductive composite materials,' Journal of Materials Processing Technology, Vol. 134, pp. 303-309, 2003 https://doi.org/10.1016/S0924-0136(02)01114-7
  3. 강영구, 조명호 '공정안전용 결로센서에 대한연구,' 한국산업안전학회 추계학술발표회 논문집, pp. 279-282, 1998
  4. 강영구, 곽봉신, 'Polymer형 내열성 PTC 소재의 특성연구,' 한국산업안전학회 춘계학술발표회 논문집, pp. 249-252, 1999
  5. N. C. Das, T. K. Chaki, D. Khastgir, 'Effect of processing parameters, applied pressure and temperature on the electrical resistivity of rubber-based conductive composites,' Carbon, Vol.40, pp. 807-816, 2002 https://doi.org/10.1016/S0008-6223(01)00229-9
  6. C. Y. Huang, C. C. Wu, 'The EMI shielding effectiveness of PC/ABS/ nickel-coated carbon fibre composites,' European Polymer Journal, Vol. 36, pp. 2729-2737, 2000 https://doi.org/10.1016/S0014-3057(00)00039-2
  7. K. P. Sau, T. K. Chaki, D. Khastgir, 'Carbon fibre filled conductive composites based on nitrile rubber (NBR), ethylene propylene diene rubber (EPDM) and their blend,' Polymer, Vol. 39, pp. 6461-6471, 1998 https://doi.org/10.1016/S0032-3861(97)10188-4
  8. C. Y. Huang, T. W. Chiou, 'The effect of reprocessing on the EMI shielding effectiveness of conductive fibre reinforced ABS composites,' European Polymer Journal, Vol. 34, pp. 37-43, 1998 https://doi.org/10.1016/S0014-3057(97)00068-2
  9. J. G. Kim, 'Synthesis of porous (Ba,Sr)TiO3 ceramics and PTCR characteristics,' Materials Chemistry and Physics, Vol. 78, pp. 154-159, 2003 https://doi.org/10.1016/S0254-0584(02)00295-X
  10. Z. G. Zhou, Z. L. Tang, Z. T. Zhang, W. Wlodarski, 'Perovskite oxide of PTCR ceramics as chemical sensors,' Sensors and Actuators, Vol. 77, pp. 22-26, 2001 https://doi.org/10.1016/S0925-4005(01)00667-0
  11. D. Zhang, D. Zhou, S. Jiang, X. Wang, S. Gong, 'The AC electrical failure behaviors and mechanisms of current limiting BaTi based Positive temperature coefficient (PTC) ceramic thermistors coated with electroless nickel phosphorous electrode,' Sensors and Actuators, Vol. 101, pp. 123-131, 2002 https://doi.org/10.1016/S0924-4247(02)00189-9
  12. M. G. Lee, Y. C. Nho, 'Electrical resistivity of carbon black filled high density polyethylene (HDPE) composite containing radiation crosslinked HDPE particles,' Radiation Physics and Chemistry, Vol. 61, pp. 75-79, 2001 https://doi.org/10.1016/S0969-806X(00)00354-6
  13. Y. Luo, G. Wang, B. Zhang, Z. Zhang, 'The influence of crystalline and aggregate structure on PTC characteristic of conductive polyethylene/carbon black composite,' European Polymer Journal, Vol. 34, pp. 1221-1227, 1998 https://doi.org/10.1016/S0014-3057(98)00099-8
  14. J. Feng, C. M. Chan, 'Double positive temperature coefficient effects of carbon black filled polymer blends containing two semicrystalline polymers,' Polymer, Vol. 41, pp. 4559-4565, 2000 https://doi.org/10.1016/S0032-3861(99)00690-4
  15. G. Boiteux, J. Foumier, D. Issotier, G. Seytre, G. Marichy, 'Conductive thermoset composites : PTC effect,' Synthetic Metals, Vol. 102, pp. 1234-1235, 1999 https://doi.org/10.1016/S0379-6779(98)01432-5
  16. H. Tang, X. Chen, Y. Luo, 'Electrical and dynamic mechanical behavior of carbon black filled polymer composites,' European Polymer Journal, Vol. 32, pp. 963-966, 1996 https://doi.org/10.1016/0014-3057(96)00026-2
  17. W. Wu, B. L. Song, Research on radiation crosslinked self regulating electrical heater, Radiation Physics and Chemistry, Vol. 46, pp. 1015-1018, 1995 https://doi.org/10.1016/0969-806X(95)00312-L
  18. Y. Hual, T. Hao, P. Jianhui, C. Xinfang, 'The stabilization effect of radiation crosslinking on positive temperature coefficient performances of carbon black-polymer composites,' Radiation Physics and Chemistry, Vol. 42, pp. 135-137, 1993 https://doi.org/10.1016/0969-806X(93)90222-G
  19. M. H. Bischoff, F. E. Dolle, 'Electrical Conductivity of carbon black polyethylene composites : Experimental evidence of the change of cluster connectivity in the PTC effect,' Carbon, Vol. 39, pp. 374-382, 2001
  20. H. Tang, X. Chen, Y. Luo, 'Studies on the PTC/NTC effect of carbon black filled low density polyethylene composites,' European Polymer Journal, Vol. 33, pp. 1383-1386, 1997 https://doi.org/10.1016/S0014-3057(96)00221-2
  21. S. J. Park, J. C. Kim, H. Y. Kim. 'Roles of work of adhesion between carbon blacks and thermoplastic polymers on electrical properties of composite,' Journal of Colloid and Interface Science, Vol. 255, pp. 145-149, 2002 https://doi.org/10.1006/jcis.2002.8481
  22. H. Tang, X. Chen, Y. Luo, 'Electrical and dynamic mechanical behavior of carbon black filled polymer composites,' European Polymer Journal, Vol. 32, No. 8, p. 963-966, 1996 https://doi.org/10.1016/0014-3057(96)00026-2
  23. K. Matsushige, K. Kobayashi, N. Iwami, T. Horiuchi, E. Shitamori, M. Itoi, 'Nanoscopic analysis of the conduction mechanism in organic positive temperature coefficient composite materials,' Thin Solid Films, Vol. 273, pp. 128-131, 1996 https://doi.org/10.1016/0040-6090(95)06804-X
  24. J. Feng C. M. Chan, 'Positive and negative temperature coefficient effects of an alternating Co polymer of tetrafluoroethylene ethylene containing carbon black-filled HDPE particles,' Polymer, Vol. 41, pp. 7279-7282, 2000 https://doi.org/10.1016/S0032-3861(00)00095-1
  25. Z. Zhao, W. Yu, X. He, X. Chen, The conduction mechanism of carbon black-filled poly(vinylidene fluoride) composite, Materials Letters 4292, pp. 1-77, 2003
  26. 강영구, 곽봉신, 김정훈, 'PU/Layer Silicate 복합체의 난연성,' 한국산업안전학회 추계학술발표회 논문집, pp. 311-315, 2002
  27. 강영구, '잠재적 화재.폭발 위험지역 작업용 녹전환형 중방식 코팅제의 특성에 관한 연구,' 산업안전학회지, 제 13권, 제 3호, pp. 102-111, 1998
  28. 강영구, 정문호, '다성분 인화성 액체의 Gel화특성 연구,' 한국산업안전학회 춘계학술발표회 논문집, pp. 73-26, 1999