Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
권호 표지

Synthesis and Properties of Segmented Block Copolyetherester Elastomers Based on PTT, PBT, PBN and Poly(tetramethylene ether glycol) (I) -Synthesis and Thermal Properties-

PTT, PBT, PBN 및 폴리테트라메틸렌에테르글리콜 구조를 갖는 세그먼트화 블록 코폴리에테르에스터 고무탄성체의 합성과 물성(I) -합성과 열적성질-

  • Baik, Doo-Hyun (Department of Textile Engineering, Chungnam National University) ;
  • Kim, Hae-Young (Department of Textile Engineering, Chungnam National University)
  • 백두현 (충남대학교 공과대학 섬유공학과) ;
  • 김해영 (충남대학교 공과대학 섬유공학과)
  • Published : 2005.08.01
⟨ Previous Next ⟩

Abstract

Segmented block copolyetheresters having three kinds of hard segments, i.e., poly(trimethylene terephthalate) (3GT), poly(butylene terephthalate) (4GT), poly(butylene naphthalate) (4GN) combined with poly(tetramethylene ether glycol) (PTMG) as a part of soft segment were synthesized with various hard segment contents. The number average molecular weights of PTMG selected were 1000, 2000, and 2900. The effects of hard segment content (HSC) and hard segment length (HSL) on the thermal properties of copolyetheresters were studied. Melting temperature $(T_m)$ was found to be a function of HSL for all the copolymers examined. Even at the very short HSL, 3GT and 4GN showed relatively high $T_m\;while\;T_m$ of 4GT decreased considerably. The 3GT hard segment showed highest hard segment crystallinity among the three, which implied that 3GT copolyetheresters had higher degree of phase separation and more stable crystalline phase in the copolyetherester elastomer than 4GT and 4GN.

Keywords

References

  1. I.M. Ward, M. A. Wilding, and H. Brody, 'The Mechanical Properties and Structure of Poly(m-methylene terephthalate) Fibers', J Polym Sci Polym Phys Ed., 1976, 14, 263-274 https://doi.org/10.1002/pol.1976.180140206
  2. R. Jakeways, I. M. Ward, and M. A. Wilding, 'Crystal Deformation in Aromatic Polyesters', J Polym Sci Polym Phys Ed., 1975, 13, 799-813 https://doi.org/10.1002/pol.1975.180130412
  3. K. Nakamae, T. Nishino, K. Hatra, F. Yokoyama, and T. Matsumoto, 'Elastic Moduli of Crystalline Region of Poly (trimehtylene terephthalate)', Zairyo, 1986, 35, 1066-1070 https://doi.org/10.2472/jsms.35.1066
  4. K. Hirotoshi, Y. Yuzo, S. Yasushi, Y. Takeshi, and K. Tadashi, 'Crystal Structure of Poly(butylene-2,6-naphthalate)', Polymer, 1998, 39, 4385-4391 https://doi.org/10.1016/S0032-3861(97)00618-6
  5. M. Y. Ju and F. C. Chang, 'Multiple Melting Behavior of Poly(butylene-2,6-naphthalate)', Polymer, 2001, 42, 5037-5045 https://doi.org/10.1016/S0032-3861(00)00888-0
  6. R. K. Adams, G. K. Hoeschele, and G. K. Witsiepe, 'Thermoplastic Elastomer', 2nd Ed., Hanser Publishers, 1996
  7. A. K. Bhowmick and H. L. Stephens, 'Handbook of Elastomers', 2nd Ed., Marcel Dekker, New York, 2001
  8. H. K. Frensdroff, 'Block-frequency Distribution of Copolymers', Macromolecules, 1971, 4, 369-375 https://doi.org/10.1021/ma60022a002
  9. D. H. Baik, M. S. Lee, B. Y. Jeon, and M. S. Han, 'Synthesis and Thermal Properties of Segmented Block Copolyetheresters Based on Poly(butylene terephthalate) and Poly(tetramethylene ether glycol)', J Korean Fiber Soc, 1994, 31, 613-620
  10. D. H. Baik and K. H. Min, 'Synthesis and Properties of Segmented Block Copolyetherester Elastomers Based on Poly(trimethylene terephthalate) and Poly(tetramethylene ether glycol)(I)', J Korean Fiber Soc, 2000, 37, 629-636
  11. B. C. Min and E. J. Bang, 'An NMR Study of the Effect of Polymerization Methods on Segmented Sequence Distributions of Poly(butylenes terephthalate)/Poly(tetramethylene glycol) Block Copolymers', Polym J, 1999, 31, 42-50 https://doi.org/10.1295/polymj.31.42
  12. H. Li and J. L. White, 'Structure Development in Melt Spinning Filaments from Polybutylene Terephthalate Based Thermoplastic Elastomers', Polym Eng & Sci, 2000, 40, 917-928 https://doi.org/10.1002/pen.11219
  13. H. Schmalz, V. Abetz, R. Lange, and M. Soliman, 'New Thermoplastic Elastomers by Incorporation of Nonpolar Soft Segments in PBT-based Copolyesters', Macromolecules, 2001, 34, 795-800 https://doi.org/10.1021/ma001226p
  14. P. D. Hong, W. T. Chung, and C. F. Hsu, 'Crystallization Kinetics and Morphology of Poly(trimethylene terephthalate)', Polymer, 2002, 43, 3335-3343 https://doi.org/10.1016/S0032-3861(02)00163-5
  15. J. M. Huang and F. C. Chang, 'Crystallization Kinetics of PTT', J Polym Sci, Polym Phys, 2000, 38, 934-941 https://doi.org/10.1002/(SICI)1099-0488(20000401)38:7<934::AID-POLB4>3.0.CO;2-R
  16. S. C. Lee, K. H. Yoon, and J. H. Kim, 'Thermal Properties of Poly(ethylene 2,6-naphthalate) and Poly(butylene 2,6-naphthalate) Blends', Polym J, 1997, 26, 813-821