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Volume 17, Issue 10
Displaying 1-8 of 8 articles from this issue
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Minoru IMOTO1959 Volume 17 Issue 10 Pages 579-594
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
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Motoyoshi OSHIMA1959 Volume 17 Issue 10 Pages 595-606
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
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Studies on the Process of Condensation-polymerizationAkira OKADA, JO KATO, Akira ODAIRA, Tadashi MUROI, Tadashi YURUGI1959 Volume 17 Issue 10 Pages 607-610
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
JOURNAL FREE ACCESSA prepolymer of polyamide was synthesized from condensation and copolymerization of three components composed of dimethyl isociuchomeronate, dimethyl adepate, and hexamethylenediamine in the presence of alcohol or without solvent. The results of estimation of its molecular weight by freezing point depression method and by estimation of terminal group indicated to be 400-1400 and it was found to be a compound of two to several molecules of diamine and diester. The prepolymer prepared by condensation copolymerization in solvent had higher molecular weight with relatively constant molar ratio. Further condensation copolymerization by fusion method was studied by estimating the viscosity of fused mass and it was found that the reaction was completed in 2.5-4 hours when the prepolymer prepared by solvent method was used and it showed no change in viscosity, while that prepared by using no solvent showed no end point of reaction and unusual increase in viscosity.View full abstractDownload PDF (3076K) -
Reduction of SulfidesKunio ITABASHI1959 Volume 17 Issue 10 Pages 611-616
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
JOURNAL FREE ACCESSCatalytic reduction of sulfides and mixed sulfides containing octyl, benzyl, and phenyl group with pressure and in the presence of molybdenum sulfide catalyst indicated that the cleavage reaction was proceeded at a temperature not exceeding 300°C and gave a corresponding hydrocarbon with good yield.The first cleavage reaction was the formation of mercaptan and hydrocarbon then followed by the cleavage of mercaptan.However, the amount remained in the mercaptan stage was less in case of a single sulfide even the reaction was carried out under unfavorable conditien.
The reaction of sulfides was compared with those of correspounding ethers and it was found that the reacton was proceeded at low temperature, with the indication that C-S-C bondwas more easily cleaved than C-0-C bond.View full abstractDownload PDF (4806K) -
Hisao ITO1959 Volume 17 Issue 10 Pages 617-623
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
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1959 Volume 17 Issue 10 Pages 623a
Published: 1959
Released on J-STAGE: October 20, 2010
JOURNAL FREE ACCESSDownload PDF (700K) -
1959 Volume 17 Issue 10 Pages 623b
Published: 1959
Released on J-STAGE: October 20, 2010
JOURNAL FREE ACCESSDownload PDF (700K) -
Shigeo KATURA1959 Volume 17 Issue 10 Pages 624-626
Published: October 01, 1959
Released on J-STAGE: October 20, 2010
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