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Volume 50, Issue 4
Displaying 1-7 of 7 articles from this issue
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Jean-Baptiste Donnet, Eugène Papirer, Alain Vidal, [in Japanese ...1977 Volume 50 Issue 4 Pages 233-240
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (665K) -
[in Japanese]1977 Volume 50 Issue 4 Pages 241-258
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (1374K) -
[in Japanese], [in Japanese]1977 Volume 50 Issue 4 Pages 259-263
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSDownload PDF (327K) -
LEWIS ACID DERIVATIVES AND AMIDE TYPE METAI COMPOUNDS AS CURING AGENTSYuji MINOURA, Shinzo YAMASHITA, Hiroshi OKAMOTO, Hidemasa YAMAGUCHI, T ...1977 Volume 50 Issue 4 Pages 264-271
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSA novel crosslinking reaction of hydroxyl-terminated liquid polybutadiene (HT-PB) was investigated. Lewis acid derivatives (boric acid, borax, aluminium alkoxide, silicate, alkylorthotitanate, phosphite and thiophosphite) and amide type metal compounds (silylamine and aminophosphine) were used as curing agents. It was observed that the viscosity of HT-PB increased by the addition of boric acid, aluminium alkoxide and alkylorthotitanate. Particularly the adding of alminium isopropoxide gave a tight cured sheet. HT-PB did not react with silicate, phosphite and thiophosphite. On the other hand, it was cured quickly with the amide type metal compounds. Especially in case of silylamine, the use of epoxy resin and carbon black gave a cured product having a tensile strength of 23kgf/cm2.View full abstractDownload PDF (614K) -
THE CURING OF LIQUID HYDROXYL-TERMINATED POLYBUTADIENE USING PHOSPHORUS PENTOXIDE, POLYPHOSPHORIC ACID, PYROPHOSPHORIC ACID AND PHOSPHORIC ACIDYuji MINOURA, Shinzo YAMASHITA, Shinzo KOJIYA, Hiroshi OKAMOTO, Hidema ...1977 Volume 50 Issue 4 Pages 272-279
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSSeveral phosphorus compounds were examined as curing agents for liquid hydroxyl-terminated 1, 4-polybutadiene (HT-PB).
Phosphorous pentoxide (P2O6) and polyphosphoric acid (approx. H6P4O13) yielded partially cross-linked polymers because of their poor compatibility and extreme reactivity with HT-PB. Phosphoric acid yielded poorly cross-linked polymers because of its low reactivity. On the contrary, a homogeneously cross-linked elastomer was obtained by use of pyrophosphoric acid (H4P2O7). The mechanical properties of the elastomer filled with carbon black (15vol.%) were as follows; HS=45, M100=21kgf/cm2, TB=37kgf/cm2 and EB=135%.
In addition, the cross-linking mechanism of this system was also discussed.View full abstractDownload PDF (616K) -
THE CURING OF LIQUID HYDROXYL-TERMINATED POLYBUTADIENE USING WITH MODIFIED POLYPHOSPHORIC ACIDYuji MINOURA, Shinzo YAMASHITA, Shinzo KOJIYA, Hiroshi OKAMOTO, Hidema ...1977 Volume 50 Issue 4 Pages 280-287
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSThe cross-linking reaction of liquid hydroxyl-terminated 1, 4-polybutadiene (HT-PB) was investigated using polyphosphoric acid derivatives, which were modified by compounds having alcoholic or phenolic hydroxyl groups.
The modification improved the poor compatibility and the extreme reactivity of polyphosphoric acid with HT-PB to provide homogeneously cured elastomer. The mechanical properties of the elastomer filled with carbon black (15vol.%) were as follows; HS=76, M100=67kgf/cm2, TB=140kgf/cm2 and EB=155%.View full abstractDownload PDF (559K) -
1977 Volume 50 Issue 4 Pages 288-289
Published: 1977
Released on J-STAGE: April 16, 2008
JOURNAL RESTRICTED ACCESSDownload PDF (248K)
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