All issues
Volume 12 (1985)
- Issue 4 Pages 163-
- Issue 3 Pages 109-
- Issue 2 Pages 57-
- Issue 1 Pages 2-
Volume 12, Issue 3
Displaying 1-8 of 8 articles from this issue
- |<
- <
- 1
- >
- >|
-
Katsumi Tochigi, Akihiro Nakamura, Kazuo Kojima1985 Volume 12 Issue 3 Pages 109-115
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSTo predict heats of mixing for systems containing alkanes, aromatic hydrocarbons, alcohols, ketones, esters, and trichlorides, by using ASOG group contribution method, the group pair parameters which are fundamental for the prediction have been determined for nine group pairs constituted by six groups CH2, ArCH, OH, CO, COO, CCl3 in the temperature range of 298.15 to 318.15K. By using the group pair parameters determined, heats of mixing have been predicted for binary and ternary systems constituted by the six groups using ASOG with relatively good accuracy.View full abstractDownload PDF (749K) -
Yoshio Shibasaki1985 Volume 12 Issue 3 Pages 116-127
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSThe polymorphic behaviors of long-chain n-alkyl acrylates and methacrylates (C12-C20) as well as vinyl esters of long-chain fatty acids (C12-C18) were investigated by thermal analysis combined with the analyses by X-ray diffraction and infrared spectroscopy. Effects of the chemical structure of functional groups and the length of hydrocarbon chains on the thermal behavior of these long-chain vinyl compounds were elucidated. n-Alkyl acrylates and methacrylates with sufficiently long chains, such as octadecyl acrylate, exhibit five crystalline modifications, α (hexagonal), sub α (hexagonal, partly diaxial orientation), β0 (uncertain), β1 (monoclinic with M|| subcell), and β2 (triclinic with T|| subcell) forms, while vinyl stearate exhibits three crystalline modifications, α, β1, and β'2 (monoclinic with O⊥ subcell) forms. With shortening of the alkyl chain the polymorphic behavior simplifies. The packing modes of long-chain vinyl compounds as well as the rotational freedom around the molecular axis and the conformational freedom of functional groups estimated from the entropy changes for fusion and transformation were also discussed in relation to the polymerizability.View full abstractDownload PDF (2016K) -
Akira Nagashima1985 Volume 12 Issue 3 Pages 128-135
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSIn the newly developed technologies, various new materials and working fluids are used or proposed. Moreover, the ranges of temperature and pressure for conventional substances have been extended. One of the key informations for new technologies is that of thermophysical properties for these substances. The situation around the thermophysical property research has changed mainly due to new demands and also innovations in measuring technique. These innovations include applications of new sensors, computers and laser.
Recent aspects of thermophysical property research have briefly been reviewed.View full abstractDownload PDF (1274K) -
Keinosuke Nagasawa1985 Volume 12 Issue 3 Pages 136-141
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSExamples of application of thermal analysis and calorimetry to the field of mineralogy and geochemistry are described. DTA has been used extensively for identification and characterization of clay minerals. But its importance in clay mineral study seems to have lowered much. New viewpoint in the interpretation of DTA curves is hoped to be established. Another use of DTA is for the study of phase equilibria of sulphide minerals.
Phase equilibria of minerals constitute an important basis of earth sciences. Although stability field of a mineral is usually determined by synthesizing it, thermodynamic calculations are often used as an alternative approach. Measurement of heat of dissolution at high temperatures is useful for studying phase relations of Al2SiO5. Free energy values are useful for constructing phase diagrams of the K2O-Al2O3-SiO2-H2O system at room temperature.View full abstractDownload PDF (884K) -
Shigeru Yamauchi1985 Volume 12 Issue 3 Pages 142-144
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (515K) -
Harumi Yokokawa1985 Volume 12 Issue 3 Pages 144-148
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (931K) -
X Reaction calorimetry (part 1)M. Sakiyama1985 Volume 12 Issue 3 Pages 149-159
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (2119K) -
Sachio Yasufuku1985 Volume 12 Issue 3 Pages 160-161
Published: July 20, 1985
Released on J-STAGE: September 07, 2009
JOURNAL FREE ACCESSDownload PDF (299K)
- |<
- <
- 1
- >
- >|