Synthesis and thermal behavior of poly(ethylene oxide) poly(N-substituted urethane)
- Title
- Synthesis and thermal behavior of poly(ethylene oxide) poly(N-substituted urethane)
- Author
- 노시태
- Keywords
- polyurethanes; N-modification; thermalproperties; combpolymer; poly(N-substitutedurethane)
- Issue Date
- 2001-12
- Publisher
- JOHN WILEY & SONS INC
- Citation
- Journal of Polymer Science, Part A: Polymer Chemistry, v. 39, issue. 23, page. 4129-4138
- Abstract
- Poly(N-substituted urethane)s with an alkyl or ligo(ethylene oxide) monomethyl ether
side chain were synthesized by the reaction operating in the following two-step
process: first, by metalation of the starting polymer with potassium tertiary butoxide
(t-BuOK) and then by treatment of the obtained urethane polyanion with tosylate in
dimethyl sulfoxide. The thermal properties of poly(ethlene oxide) poly(N-substituted
urethane) (N-sub PEOPU) were investigated in view of the N-substitution degree and
properties of the substituent. The chemical structures were characterized by Fourier
transform infrared, H-NMR, and C-NMR spectroscopies. DSC and thermo gravimetric
analysis (TGA) were used to investigate the thermal properties of N-sub PEOUPs. As
the degree of N-methylation increased, the glass-trasition temperature(Tg) of the
N-sub PEOPUs linearly decreased from 6 to -29℃, and the weight-loss temperature of
5% (Td) from TGA in air increased from 278 to 360℃. In the fully N-substituted
PEOPUs, the behavior of the thermal decomposition of the temperature range of
360-440℃. The Tg was shifted to a lower temperature with an increasing length of
the substituent in N-sub PEOPU. Improvement fo the thermal stability by
N-substitution was more significant in N-alkyl PEOPU than in N-ethoxylate PEOPU.
- URI
- https://onlinelibrary.wiley.com/toc/10990518/39/23?sid=EBSCO%3Aedswschttps://repository.hanyang.ac.kr/handle/20.500.11754/160498
- ISSN
- 0887-624X
- DOI
- 10.1002/pola.10053
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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