Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
권호 표지
DOI QR코드

DOI QR Code

Reactive compatibilization of liquid crystalline polymer/ethylene-acrylic acid ionomer blends

액정 고분자/에틸렌-아크릴산 이오노머 블렌드의 반응상용화에 관한 연구

  • Cruz, Heidy (Division of Advanced Materials Science & Engineering, Kongju National University) ;
  • Son, Younggon (Division of Advanced Materials Science & Engineering, Kongju National University)
  • Received : 2015.03.23
  • Accepted : 2015.05.07
  • Published : 2015.05.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper describes the reactive compatibilization of blends of a wholly aromatic thermotropic copolyester liquid crystalline polymer (TLCP) with random copolymers of ethylene and acrylic acid (EAA) and their salts. Blends were prepared by melt mixing in an intensive batch mixer, and the formation of a graft copolymer due to acidolysis between the TLCP and the acrylic acid group of the ionomer was evaluated. Chemical reaction was assessed by torque measurement during melt mixing and by thermal analysis and morphological observation. The Na-salt of the EAA ionomers was especially effective at promoting a grafting reaction. The extent of reaction depended not only on the cation, but also composition of the ionomer and reaction time. The product of the grafting reaction between the TLCP and a sodium-neutralized ionomer proved to be an effective compatibilizer for TLCP and EAA ionomers.

방향족 열방성 액정 고분자와 에틸렌-아크릴 산 공중합체 및 그 금속염 고분자간의 반응 상용화에 관하여 연구하였다. 블렌드는 배치 믹서에서 제조하였으며 액정 고분자의 에스터 그룹과 이오노머의 아크릴산 사이에 발생하는 acidolysis 반응으로 형성되는 그라프트 공중합체의 발생 유무를 평가하였다. 반응의 정도는 배치 믹서에서 시간에 따른 토크의 증가와 열분석 및 형태학 상 구조를 통해 평가하였다. poly(ethylene-co-acrylic acid) (EAA) 이오노머의 Na 염이 반응을 증진시키는데 특히 효과적임을 알 수 있었다. 반응의 진행 정도는 금속염의 종류 뿐 아니라 이오노머의 조성과 반응 시간에 따라 변하였다. 액정 고분자와 Na로 중화된 이오노머 간의 반응으로 생성된 그라프트 공중합체는 액정 고분자와 EAA 이오노머 블렌드의 반응상용화제로 효과가 높음을 미세 구조 분석을 통하여 알 수 있었다.

Keywords

References

  1. G. T. Pawlikowski, D. Dutta, and R. A. Weiss, "Molecular Composites and Self-Reinforced Liquid Crystalline Polymer Blends", Annu. Rev. Mater. Sci., Vol. 21, pp. 159-184 (1991). DOI: http://dx.doi.org/10.1146/annurev.ms.21.080191.001111
  2. D. Dutta, R. A. Weiss, and J. He, " Compatibilization of Blends Containing Thermotropic Liquid Crystalline Polymers With Sulfonate Ionomers ", Polymer, Vol. 37, pp. 429-435 (1996). DOI: http://dx.doi.org/10.1016/0032-3861(96)82912-0
  3. H. C. Chin, K. C. Choi, and F. C. Chang, "Reactive compatibilization of the poly(ethylene terephthalate)/liquid crystalline polymer blends by solid epoxy resin as a coupling agent ", J. Appl. Polymer. Sci., Vol. 60, pp. 2503-2516 (1996). DOI: http://dx.doi.org/10.1002/(SICI)1097-4628(19960627)60:13<2503::AID-APP21>3.0.CO;2-3
  4. M. M. Miler, J. M. G. Cowie, D. L. Brydon, and R. R. Mather, "Fibres from polypropylene and liquid crystal polymer blends using compatibilizing agents: 3. Assessment of graft side chain liquid crystalline compatibilizers based upon acrylic acid-functionalized polypropylene", Polymer, Vol. 38, pp. 1565-1568 (1997). DOI: http://dx.doi.org/10.1016/S0032-3861(96)00668-4
  5. T. G. Gopakumar, S. Ponrathnam, A. Lele, C. R. Rajan, and A. Fradet, "In situ compatibilization of poly(phenylene sulphide)/wholly aromatic thermotropic liquid crystalline polymer blends by reactive extrusion: morphology, thermal and mechanical properties ", Polymer, Vol. 40, pp. 357-364 (1998). DOI: http://dx.doi.org/10.1016/S0032-3861(98)00190-6
  6. G. V. Laivins, "Analysis of the interactions in an in-situ composite: poly(alkylene terephthalates) reinforced with thermotropic liquid-crystalline polyesters ", Macromolecules, Vol. 22, pp. 3974-3980 (1989). DOI: http://dx.doi.org/10.1021/ma00200a027
  7. A. Datta, and D. G. Baid, "Compatibilization of thermoplastic composites based on blends of polypropylene with two liquid crystalline polymers ", Polymer, Vol. 36, pp. 505-514 (1995). DOI: http://dx.doi.org/10.1016/0032-3861(95)91559-P
  8. H. O'Donnell, and D. G. Baid, "In situ reinforcement of polypropylene with liquid-crystalline polymers: effect of maleic anhydride-grafted polypropylene ", Polymer, Vol. 36, pp. 3113-3126 (1995). DOI: http://dx.doi.org/10.1016/0032-3861(95)97874-F
  9. Y. P. Chiou, K. C. Chiou, and F. C. Chang, "In situ compatibilized polypropylene/liquid crystalline polymer blends ", Polymer, Vol. 37, pp. 4099-4106 (1996). DOI: http://dx.doi.org/10.1016/0032-3861(96)00247-9
  10. Y. P. Chiou, D. Y. Chang, and F. C. Chang, "In situ compatibility of polystyrene and liquid crystalline polymer blends ", Polymer, Vol. 37, pp. 5653-5660 (1996). DOI: http://dx.doi.org/10.1016/0032-3861(96)00247-9
  11. H. C. Chin, and F. C. Chang, "Reactive compatibilization of PET/LCP blends by a multifunctional epoxy coupler ", Polymer, Vol. 38, pp. 2947-2956 (1997). DOI: http://dx.doi.org/10.1016/S0032-3861(96)00840-3
  12. D. Y. Chang, and F. C. Chang, "In situ reactive compatibilized noryl/LCP blends ", J. Appl. Polym. Sci, Vol. 56, pp. 1015-1028 (1995). DOI: http://dx.doi.org/10.1002/app.1995.070560901
  13. H. Karhinen, A. Salmela, M. Aalto, H. Kricheldorf, C. Bergtrom, and N. Katsaras, "Substituted liquid crystalline polymers and their use as compatibilizers in blends of lcp's and other polymers ", U.S. Patent WO 9807533A1.
  14. J. Park and M. Bang, "Effect of Aromatic Ring Content on the Properties of Liquid Crystalline Copolyesters", Journal of The Korea Academia-Industrial cooperation Society Vol. 15, pp. 575-580 (2014). DOI: http://dx.doi.org/10.5762/KAIS.2014.15.1.575
  15. M. Bang, "Synthesis and Properties of Liquid Crystalline Copolymers with Ether-ether-ester Linkage in Main Chain", Journal of The Korea Academia-Industrial cooperation Society, Vol. 11, pp. 1367-1372 (2010). DOI: http://dx.doi.org/10.5762/KAIS.2010.11.4.1367
  16. E. Lee and M. Bang, "Effects of Alkoxy Side Chain on the Properties of Wholly Aromatic Liquid Crystalline Polyesters with Biphenylene Unit", Journal of The Korea Academia-Industrial cooperation Society, Vol. 11, pp. 4041 - 4046 (2010). DOI: http://dx.doi.org/10.5762/KAIS.2010.11.10.4041
  17. M. Bang, "Crystallization Behaviors of Liquid Crystalline Polymer/Poly(ethylene terephthalate) blends", Journal of The Korea Academia-Industrial cooperation Society, Vol. 7, pp. 559-566 (2006).
  18. Y. Son, "Study on Rheological Properties of HBA/HNA Thermotropic Liquid Crystalline Polymer", Journal of The Korea Academia-Industrial cooperation Society, Vol. 11 pp. 5216-5220 (2010). DOI: http://dx.doi.org/10.5762/KAIS.2010.11.12.5216
  19. Y. Son, "Study on a compatibilization of polypropylene/thermotropic liquid crystalline polymer blends", Journal of The Korea Academia-Industrial cooperation Society, Vol. 8, pp. 1215-1219 (2007).
  20. M. Lambla, and M. Seadan, "Interfacial grafting and crosslinking by free radical reactions in polymer blends ", Polym. Eng. Sci., Vol. 32, pp. 1687-1694 (1992). DOI: http://dx.doi.org/10.1002/pen.760322206