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홍영근,조성무,이화섭,Hong, Yeong-Geun,Jo, Seong-Mu,Lee, Hwa-Seop 한국섬유공학회 1993 한국섬유공학회지 Vol.30 No.12
Various solvents were treated on the cellulose fiber spun in our lab. Results showed that the lower the molecular weight of solvent, the higher the decrease of initial modulus of fiber and provided that the solubility parameter of cellulose is 25.66 the decrease of modulus was apparently high in two separate regions, region of high values. However, in the middle of two regions the decrease of initial modulus was nil or dull. This means that cellulose chains are associated with each other by two forces, first, by dispersion forces between the top and bottom sheets of chains and by hydrogen bonding between the similes of sheets.
열분해 기체크로마토그래피를 이용한 PVA-polyvinyltrifluoroacetate 공중합체중의 trifluoroacetyl 기의 정량
채희주,조성무,유학수,Chae, Hee-Ju,Jo, Seong-Mu,Lyu, Hark-Soo,Nakajima, Toshinari 대한화학회 1987 대한화학회지 Vol.31 No.3
열분해 기체크로마토그래피법을 이용하여 C-F 결합을 깨지 않고 PVA-PVFAc 공중합체중의 trifluoroacetyl기의 양을 정량하여, 공중합체내의 단량체 VFAc의 조성몰분율을 구하였다. GC-pyrogram에서의 trifluoroacetyl compds의 봉우리 면적은 공중합체 시료 3mg이내에서 시료무게와 직선관계를 갖는다. 서로 다른 trifuoroacetyl 치환도를 갖는 공중합체의 gas chromatogram으로부터 계산된 플루오르의 양은 이온전극법을 이용한 플루오르원소 분석치와 잘 일치한다. The composite mole fraction of monomers in PVA-PVFAc copolymer could be calculated from the analysis of trifluoroacetyl group by the pyrolysis gas chromatography without breaking of C-F bonds in polymer. A linearity between trifluoroacetyl peak areas in pyrogram and sample weights was obtained within the range below 3mg. The data of trifluoroacetyl contents derived from gas chromatogram of copolymers with various D.S. were in good agreement with results by the Specific Ionmeter.
4-Vinyl-3-phenylsydnon의 중합반응 및 그 중합체의 물성에 관한 연구(I) ―4-Alkenylsydnone의 합성 및 그의 중합성에 관하여―
채희주,김영률,조성무,Chae, Hui-Ju,Kim, Yeong-Ryul,Jo, Seong-Mu 한국섬유공학회 1988 한국섬유공학회지 Vol.25 No.4
After metalation of 3-phenylsydnone by using n-BuLi or n-BuMgBr, 4-(2-hydroxyisopropyl)-3-phenylsydnone and 4-(1-hydroxy-1-ethyl)-3-phenylsydnone are obtained by addition reaction of acetone and acetaldehyde, respectively. The subsequent dehydration of each cabinol using P2O5 produces the corresponding alkenylsydnones. Polymerization reaction is carried out using this 4-vinyl-3-phenylsydnone; the reaction does not occur in the presence of radical initiator, on the other hand, the dimer is formed under cationic initiator, BF3-etherate and its structure is proposed. But the oligomer is obtained under the anionic polymerization condition.