Elastomers and Composites

  • 제58권3호
  • /
  • Pages.128-135
  • /
  • 2023
  • /
  • 2092-9676(pISSN)
  • /
  • 2288-7725(eISSN)
한국고무학회 (The Rubber Society of Korea)
권호 표지
DOI QR코드

DOI QR Code

Preparation and Characterization of Modified Natural Rubber Applied to Seismic Isolation Damper Rubber

  • Seong-Guk Bae (Elastic Composite Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Woong Kim (Elastic Composite Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Yu mi Yun (Elastic Composite Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Jin Hyok Lee (Elastic Composite Research Division, Korea Institute of Footwear & Leather Technology) ;
  • Jung-Soo Kim (Elastic Composite Research Division, Korea Institute of Footwear & Leather Technology)
  • 투고 : 2023.09.12
  • 심사 : 2023.09.19
  • 발행 : 2023.09.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

To improve the adhesive strength of natural rubber (NR) for a seismic isolation damper, citraconic acid-g-NR (CCA-g-NR) was synthesized via the melt grafting of citraconic acid (CCA) onto NR using an azobisisnomerobutyronitrile (AIBN) initiator. Subsequently, the influence of CCA and AIBN concentrations on the graft ratio G/R (%) and graft efficiency G/E (%) of the CCA-g-NR was investigated. The optimum CCA and AIBN concentrations required to achieve the desired G/R (3.49%) and G/E (49.8%) were found to be 7 phr and 0.13 phr, respectively. Additionally, we studied the influence of CCA-g-NR concentration on the mechanical properties (tensile strength, elongation at break, and modulus at 300%), adhesive strength, and cure characteristics of the rubber compound in the seismic isolation damper. As the concentration of CCA-g-NR increased, the elongation at break and adhesive strength of the compound increased, whereas its tensile strength and modulus at 300% decreased. Moreover, as the concentration increased, the maximum torque decreased and the scorch time was delayed to obtain an optimal vulcanization time.

키워드

과제정보

This research was supported by the Ministry of Trade, Industry, and Energy Grant funded by the Korean Government [Project Number 20011366].

참고문헌

  1. 2022 Seismological Annual Report, Korea Meteorological Administration.
  2. G. P. Warn and K. L. Ryan, "A review of seismic isolation for buildings: historical development and research needs", Buildings, 2, 300 (2012).
  3. C. Chovino and P. Gramain, "Influence of the Conformation on Chemical Modification of Polymers: Study of the Quarternization of Poly(4-vinylpyridine)", Macromolecules, 31, 7111 (1998).
  4. E. J. Wang, J. S. Yoon, C. S. Yoo, and N. C. Paik, "Modification of Styrene-Butadiene-Styrene Block Copolymer and the Proper ties of Graft Products", Elast. Compos., 25, 273 (1990).
  5. S. I. Joo, H. C. Cho, S. H. Lee, and S. C. Hong, "Modification of Rubbers through Chemical Reactions including Controlled/"living" Radical Polymerization Techniques", Elast. Compos., 44, 122 (2009).
  6. Smith, Brian. "The Infrared Spectra of Polymers IV: Rubbers", Spectroscopy, 37, 1 (2022).
  7. I. S. Kim, D. Y. Lee, K. S. Sohn, J. H. Lee, and J. W. Bae, "Characterization on the Ozone Oxidation of Raw Natural Rubber Thin Film using Image and FT-IR Analysis", Elast. Compos., 54, 110 (2019).
  8. M. Jeria-Orell, G. del C. Pizarro, O. G. Marambio, K. E. Geckeler, "Novel Hydrogels based on Itaconic Acid and Citraconic Acid: Synthesis, Metal Ion Binding, and Swelling Behavior", J. Appl. Polym. Sci., 113, Issue1 104 (2009).
  9. J. S. Kim, J. W. Bae, J. H. Lee, G. N. Kim, S. T. Oh, Y. H. Lee, and H. D. Kim, "Melt grafting of citraconic acid onto an ethylene-propylene-diene terpolymer (EPDM) -Effect of reaction conditions and initiator type on the melt grafting of citraconic ccid onto EPDM", Elast. Compos., 48, 39 (2013).
  10. Poschl, S. G. Sathi, R. Stocek, and O. Kratina, "Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends", Polymers, 13, 1510 (2021).
  11. M. Setyadewi1, I. N. Indrajati1, and N. Darmawan, "Mechanical Properties and Curing Characteristics of Shape Memory Natural Rubber", International Seminar on Metallurgy and Materials, IOP Conf. Series: Mater. Sci. Eng., 541 (2019).
  12. C. Choi, W. K. Lee, and C. Y. Park, "Cure Characteristics, Mechanical Property and Ozone Resistance of Natural Rubber/Bromo Isobutylene Isoprene Rubber Blend", Elast. Compos., 53, 168 (2018).
  13. A. Ansarifar, L. Wang, R. J. Ellis, S. P. Kirtley, and N. Riyazuddin, "Enhancing the mechanical properties of styrene-butadiene rubber by optimizing the chemical bonding between silanized silica nanofiller and the rubber", J. Appl. Polym. Sci., 105, 322 (2007).
  14. S. Shin, et al. "Improved Silica Dispersibility in Silica-rubber Compounds for a Tire Tread by Using an Itaconic Acid-based Polymeric Dispersant", Fibers Polym., 22, 196 (2021).
  15. J. S. Yu and S. H. Lee, "Adhesion and Adhesion Mechanism", J. Adhes. Inter., 1, 63 (2000).
  16. K. T. Han, "Adhesives on automobile", Polym. Sci. Technol., 6, 568 (1995).