Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Optimization of Anionic Ring-opening Polymerization for Industrial Application of Polyamide 6

Polyamide 6의 산업적인 적용을 위한 음이온 개환 중합의 최적화 연구

  • Min, Jin Hong (Department of Chemical Engineering and Materials Science, Sangmyung University) ;
  • Kang, Jiseon (Department of Chemical Engineering and Materials Science, Sangmyung University) ;
  • Huh, Mongyoung (Korea Institute of Carbon Convergence Technology) ;
  • Yun, Seok Il (Department of Chemical Engineering and Materials Science, Sangmyung University)
  • 민진홍 (상명대학교 화공신소재학과) ;
  • 강지선 (상명대학교 화공신소재학과) ;
  • 허몽영 (한국탄소융합기술원) ;
  • 윤석일 (상명대학교 화공신소재학과)
  • Received : 2019.12.13
  • Accepted : 2020.01.04
  • Published : 2020.02.29
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Abstract

To achieve fast synthesis (10 minutes after injection into a mold) of polyamide 6 by anionic ring-opening polymerization of the monomer, ε-caprolactam, the effects of fabrication parameters, such as the concentration of the initiator or activator, reaction temperature, moisture content of the monomer, commercial additives to the polymerization, and properties of polyamide 6, were investigated. The polyamide 6 synthesized at a reaction temperature of 150 ℃, and an initiator or activator concentration of 2.5/1.67 wt%, showed a high reaction conversion, molecular weight, and excellent mechanical strength. Applying these parameters to the thermoplastic resin-transfer molding process led to the successful fabrication of thermoplastic carbon fiber-reinforced composites. Anionic polymerization was successful only for monomers with a moisture content of less than 200 ppm. Applying dried N2 gas to the molten ε-caprolactam effectively reduced the moisture content of ε-caprolactam, converting the humid monomers into polymerizable monomers with a low moisture content of less than 200 ppm. The effect of commercial modifiers, BRUGGOLEN® TP-C1608 and NYRIM ADDITIVE 6 plus (Bruggeman, Germany) on the thermal stability and toughness of PA6 was also investigated.

Keywords

Acknowledgement

논문은 산업통상자원부 산업소재핵심기술개발사업에서 지원하는 10052724 연구과제(반응 중합을 이용한 자동차용 열가소성 탄소섬유 복합소재/공정 및 이를 활용한 센터플로어 차체 구조의 전주기 개발)로 수행된 것이며 지원에 감사드립니다.

References

  1. M. I. Kohan, "Nylon Plastics Handbook", 1st Ed., Hanser Publisher, New York, 1995, p.518.
  2. J. A. Brydon, "Plastics Materials", Butterworth Scientific Press, London, 1982, pp.1-16.
  3. K. Ueda, M. Nakai, M. Hosoda, and K. Tai, "Synthesis of High Molecular Weight Nylon 6 by Anionic Polymerization of ${\varepsilon}$-Caprolactam, Mechanism and Knitics", Polymer, 1997, 29, 568-573. https://doi.org/10.1295/polymj.29.568
  4. P. H. Hermans, D. Heikens, and P. F. van Velden, "On the Mechanism of the Polymerization of ${\varepsilon}$-Caprolactam. II. The Polymerization in the Presence of Water", J. Polym. Sci., 1958, 30, 81-104. https://doi.org/10.1002/pol.1958.1203012108
  5. C. Zhao, G. Hu, R. Justice, D. W. Schaefer, S. Zhang, M. Yang, and C. C. Han, "Synthesis and Characterization of Multiwalled Carbon Nanotubes Reinforced Polyamide 6 via in situ Polymerization", Polymer, 2005, 46, 5125-5132. https://doi.org/10.1016/j.polymer.2005.04.065
  6. R. P. Scelia, S. E. Schonfeld, and L. G. Donaruma, "Some Effects of Cocatalyst Structure on the Anionic Polymerization of ${\varepsilon}$-Caprolactam. II", J. Appl. Polym. Sci., 1967, 11, 1299-1313. https://doi.org/10.1002/app.1967.070110726
  7. O. Crespy and K. Landfester, "Anionic Polymerization of ${\varepsilon}$-Caprolactam in Miniemulsion: Synthesis and Characterization of Polyamide-6 Nanoparticles", Macromolecules, 2005, 38, 6882-6887. https://doi.org/10.1021/ma050616e
  8. H. Xia, Q. Wang, and G. Qiu, "Polymer-encapsulated Carbon Nanotubes Prepared through Ultrasonically Initiated in situ Emulsion Polymerization", Chem. Mater., 2003, 15, 3879-3886. https://doi.org/10.1021/cm0341890
  9. K. van Rijswijk and H. E. N. Bersee, "Reactive Processing of Textile Fiber-reinforced Thermoplastic Composites - An Overview", Compos. Pt. A-Appl. Sci. Manuf., 2007, 38, 666-681. https://doi.org/10.1016/j.compositesa.2006.05.007
  10. T. Ageyeva, I. Sibikin, and J. Karger-Kocsis, "Polymers and Related Composites via Anionic Ring-opening Polymerization of Lactams: Recent Developments and Future Trends", Polymers, 2018, 10, 357. https://doi.org/10.3390/polym10040357
  11. S. Pillay, U. K. Vaidya, and G. M. Janowski, "Liquid Molding of Carbon Fabric-reinforced Nylon Matrix Composite Laminates", J. Thermoplast. Compos. Mater., 2005, 18, 509-526. https://doi.org/10.1177/0892705705054412
  12. K. van Rijswijk, H. E. N. Bersee, W. F. Jager, and S. J. Picken, "Optimisation of Anionic Polyamide-6 for Vacuum Infusion of Thermoplastic Composites: Choice of Activator and Initiator", Compos. Pt. A-Appl. Sci. Manuf., 2006, 37, 949-956. https://doi.org/10.1016/j.compositesa.2005.01.023
  13. L. F. Berg, "Process Development for the Reactive Injection Moulding of Caprolactam Intermediates", Doctoral Thesis, Karlsruhe Institute of Technology, Germany, 2011.
  14. A. Alfonso, J. Andres, and J.A. Garcia, "Study of the Proper Sintering Conditions of Anionically-polymerized Polyamide 6, Matrices for the Fabrication of Greencomposites", Mater. Sci. Forum, 2012, 713, 121-126. https://doi.org/10.4028/www.scientific.net/MSF.713.121
  15. C. Yan, H. Li, X. Zhang, Y. Zhu, X. Fan, and L. Yu, "Preparation and Properties of Continuous Glass Fiber Reinforced Anionic Polyamide-6 Thermoplastic Composites", Mate. Des., 2013, 46, 688-695. https://doi.org/10.1016/j.matdes.2012.11.034
  16. N. Barhoumi, A. Maazouz, M. Jaziri, and R. Abdelhedi, "Polyamide from Lactams by Reactive Rotational Molding via Anionic Ring-opening Polymerization: Optimization of Processing Parameters", Express Polym. Lett., 2013, 7, 76-87. https://doi.org/10.3144/expresspolymlett.2013.7
  17. C.-C. Hohne, R. Wendel, B. Kabisch, T. Anders, F. Henning, and E. Kroke, "Hexaphenoxycyclotriphosphazene as FR for CFR Anionic PA6 via T-RTM: A Study of Mechanical and Thermal Properties", Fire Mater., 2017, 41, 291-306. https://doi.org/10.1002/fam.2375
  18. B.-J. Kim, S.-H. Cha, and Y.-B. Park, "Ultra-high-speed Processing of Nanomaterial-reinforced Woven Carbon Fiber/Polyamide 6 Composites Using Reactive Thermoplastic Resin Transfer Molding", Compos. Pt. B-Eng., 2018, 143, 36-46. https://doi.org/10.1016/j.compositesb.2018.02.002
  19. A. Maazouz, K. Lamnawar, and M. Dkiera, "Chemorheological Study and In-situ Monitoring of PA6 Anionic-ring Polymerization for RTM Processing Control", Compos. Pt. A-Appl. Sci. Manuf., 2018, 107, 235-247. https://doi.org/10.1016/j.compositesa.2018.01.007
  20. K. van Rijswijk, S. Lindstedt, D. P. N. Vlasveld, H. E. N. Bersee, and A. Beukers, "Reactive Processing of Anionic Polyamide-6 for Application in Fiber Composites: A Comparitive Study with Melt Processed Polyamides and Nanocomposites", Polym. Test., 2006, 25, 873-887. https://doi.org/10.1016/j.polymertesting.2006.05.006
  21. K. van Rijswijk, H. E. N. Bersee, W. F. Jager, and S. J. Picken, "Optimisation of Anionic Polyamide-6 for Vacuum Infusion of Thermoplastic Composites: Influence of Polymerization Temperature on Matrix Properties", Polym. Test., 2006, 25, 392-404. https://doi.org/10.1016/j.polymertesting.2005.11.008
  22. K. van Rijswijk, J. J. E. Teuwen, H. E. N. Bersee, and A. Beukers, "Textile Fiber-reinforced Anionic Polyamide-6 Composites. Part I: The Vacuum Infusion Process", Compos. Pt. A-Appl. Sci. Manuf., 2009, 40, 1-10. https://doi.org/10.1016/j.compositesa.2008.03.018
  23. K. van Rijswijk, J. J. E. Teuwen, H. E. N. Bersee, and A. Beukers, "Textile Fiber-reinforced Anionic Polyamide-6 Composites. Part II: Investigation on Interfacial Bond Formation by Short Beam Shear Test", Compos. Pt. A-Appl. Sci. Manuf., 2009, 40, 1033-1043. https://doi.org/10.1016/j.compositesa.2009.02.018
  24. X. Zhang, X. Fan, H. Li, and C. Yan, "Facile Preparation Route for Graphene Oxide Reinforced Polyamide 6 Composites via in situ Anionic Ring-opening Polymerization", J. Mater. Chem., 2012, 22, 24081-24091. https://doi.org/10.1039/c2jm34243j
  25. R. J. Young and P. A. Lovell, "Introduction to Polymers", 2nd Ed., Chapman & Hall, UK, 1991, pp.15-19.
  26. P. Biernacki and M. Wlodaczyk, "A Study of the Chemical and Physical Structure of Polycaproamide Obtained in Anionic Polymerization of Caprolactam in Solvent", Eur. Polym. J., 1984, 20, 635-643. https://doi.org/10.1016/0014-3057(84)90108-3
  27. H. Cartledge and C. A. Baillie, "Studies of Microstructural and Mechanical Properties of Nylon/Glass Composite. Part I. The Effect of Thermal Processing on Crystallinity, Transcrystallinity and Crystal Phases", J. Mater. Sci., 1999, 34, 5099-5111. https://doi.org/10.1023/A:1004713200894
  28. Z. W. Wicks Jr., Prog. Org. Coat., 1975, 3, 73-99. https://doi.org/10.1016/0300-9440(75)80002-6
  29. S. H. Moosavian, "Lactam Purification", US Patent 4,610,768 (1985).
  30. http://www.brueggemann.com/en/ap-nylon-additives (accessed December 12, 2019).