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Predecessor
Volume 46, Issue 11
Displaying 1-11 of 11 articles from this issue
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[in Japanese]1973 Volume 46 Issue 11 Pages 893-902
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
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[in Japanese]1973 Volume 46 Issue 11 Pages 903-907
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
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[in Japanese], [in Japanese]1973 Volume 46 Issue 11 Pages 908-915
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSDownload PDF (1526K) -
[in Japanese], [in Japanese]1973 Volume 46 Issue 11 Pages 916-924
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSDownload PDF (1591K) -
[in Japanese]1973 Volume 46 Issue 11 Pages 925-931
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSDownload PDF (1433K) -
[in Japanese]1973 Volume 46 Issue 11 Pages 932-938
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSDownload PDF (1533K) -
[in Japanese]1973 Volume 46 Issue 11 Pages 939-942
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
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[in Japanese]1973 Volume 46 Issue 11 Pages 948-953
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
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MODIFICATION OF POLYURETHANE ELASTOMERS (III)Hiroshi OKAMOTO, Shinji INAGAKI, Kenzo KOJIMA, Akinori MAEDA, Eisuke Y ...1973 Volume 46 Issue 11 Pages 954-958
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSThe dielectric and the electrical conduction properties have been studied of the modified polyurethane obtained by the addition of vinyl acetate and styrene.
The dielectric main absorption of the modified sample shifted toward the region of higher temperatures and the apparent activation energy and magnitude of absorption were larger than those of an unmodified sample.
From these results, it is supposed that these added vinyl monomers have been bonded to the main chain of polyurethane through primary bond and the glass transition temperature of modified samples has increased.
The effects of added monomers on the conduction process could not be observed from the result of measuring the temperature dependence of electrical conductivity.View full abstractDownload PDF (781K) -
SOLVENT CRACK GROWTH OF RUBBER (I)Kunihiko NAKASHIMA, Katuhide MANABE1973 Volume 46 Issue 11 Pages 959-963
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
JOURNAL FREE ACCESSWhen a rectangular strip of rubber with a small razor cut in the center was extended and then immersed into the solvent, it was found that the small cut grew at a constant rate. Linear relationship was shown between the rate of crack growth (υ) and the extension ratio (α), and critical extensions were found. The kinetics for this crack growth and the critical extensions were considered here.
The rate of crack growth increases considerably with an increase of aromatic ompounds in gasoline, and υ/α increases in proportion to the third power of concentration of aromatic compounds.
On the other hand, critical extensions do not depend upon the kinds of concentration of aromatic compounds, but show the same value. The apparent activation energy of crack growth was 11-14 kcal/mol. It was considered from these results that the mechanism of the solvent crack of rubber is attributed to the diffusion of the solvent into rubber and the expansion of network chains of rubber.View full abstractDownload PDF (762K) -
1973 Volume 46 Issue 11 Pages 964-965
Published: November 15, 1973
Released on J-STAGE: October 16, 2009
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