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Volumn 44, Issue 16, 2006, Pages 4795-4803

Synthesis and properties of the polythiourethanes obtained by the cationic ring-opening polymerization of cyclic thiourethanes

Author keywords

Block copolymerization; Cationic polymerization; Kinetics (polym.); Refractive index; Thermal properties

Indexed keywords

BLOCK COPOLYMERS; MOLECULAR WEIGHT; MONOMERS; POSITIVE IONS; PYROLYSIS; SYNTHESIS (CHEMICAL); THERMAL EFFECTS;

EID: 33748324570     PISSN: 0887624X     EISSN: 10990518     Source Type: Journal    
DOI: 10.1002/pola.21557     Document Type: Article
Times cited : (11)

References (21)
  • 17
    • 33748330685 scopus 로고    scopus 로고
    • note
    • 5 we confirmed that the endcapping reaction of the growing ends in the polymerization of BTOT with Et2NCS2 -·Na+·3H2O proceeds efficiently to produce the diethyldithiocarba mate group at the terminating end quantitatively by by MALDI-TOF mass spectroscopy analysis.
  • 18
    • 33748320219 scopus 로고    scopus 로고
    • note
    • Because the 1H NMR spectroscopy analysis of the polymer obtained with a high feed ratio could not show the signals corresponding to the terminating end, the polymerization under a low feed ratio ([BOT]0/[BF30Et2]0 = 7.0) was performed.
  • 19
    • 33748332293 scopus 로고    scopus 로고
    • note
    • Because the heat of the propagation reaction in the polymerization of BOT [enthalpy charge (ΔH) = -2.2 kcal/mol], calculated by ab initio molecular orbital calculations (HF/3-21G), was smaller than that of BTOT (-9.6 kcal/mol) and the 13C NMR signal of the thiocarbonyl group of BOT (188.6 ppm) appeared in a lower field in comparison with BTOT (187.6 ppm), the difference in the polymerizability could not be explained by the ring strain and basicity of the monomers.
  • 20
  • 21
    • 1642376259 scopus 로고    scopus 로고
    • Wiley: New York
    • Abe, A.; et al. Polymer Handbook; Wiley: New York, 1999; p 571.
    • (1999) Polymer Handbook , pp. 571
    • Abe, A.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.