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Poly dimethylsiloxane-Amide Block Copolymer의 合成과 熱的 特性에 관한 硏究
吉忠男,林洛俊 단국대학교 대학원 1986 學術論叢 Vol.10 No.-
Isocyanated group terminated polydimethysiloxane was prepared from oligosiloxane with toluene diisocyanate at room temperature for 90 minutes and ε-caprolactam terminated polydimethylsiloxane was prepared from isocyanated group terminated polydimethylsiloxane with ε-caprolactam at 100℃ for 2 hours. Poly (dimethylsiloxane-amide) copolymer was prepared through the copolymerization of ε-caprolactam terminated polydimethylsiloxane, ε-caprolactamate solution and ε-caprolactam under 120℃ for 90 minutes. The structures of oligomer and copolymer were determined by both infrared spectra and NMR. Thermal properties of the copolymer were measured with thermogravimetric analysis and differential scanning calorimeter. The melting and oxidation point of the copolymer were found to 307.7℃, 479.5℃ respectively. The initial decomposition point of poly (ε-caprolactam) and copolymer were found to 226℃, 321℃ respectively.
Silicon Carbide 섬유의 제조에 관한 기초연구(I) -Poly(dimethyl-co-methylphenylsilylene) Copolymer의 합성과 열분해-
강두환,심양,양재건,한정련,길충남,Kang, D. W.,Shim, Y.,Yang, J. K.,Han, J. R.,Kihl, C. N. The Korean Fiber Society 1988 한국섬유공학회지 Vol.25 No.2
Soluble poly(dimethyl-co-methylphenylsilylene) (PDMPS) block copolymers with high molecular were prepared by copolymerizing dimethyldichlorosilane with methylphenyldichlorosilane using Na/K alloy and 2-N, N-dimethylaminonaphthalene co-catalyst, and the chemical structure was identified by IR, UV, and NMR. According to the mole ratio of the reactants and the reaction conditions, block units of (Me2Si) and (PhMeSi) in PDMPS copolymer, melting point, molecular weight change, yield, and solubility of PDMPS were measured. The block copolymer was white solid. The activation energies for the depolymerization of polydimethylsilane(PDMS), polymethylphenylsilane(PMPS), and PDMPS were determined by dynamic TGA data. The depolymerization activation energies for PDMS, PMPS, and PDMPS were 52, 71, 58 kcal/g$.$mole, respectively.