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Volume 60, Issue 8
Displaying 1-10 of 10 articles from this issue
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[in Japanese]1987 Volume 60 Issue 8 Pages 423-432
Published: 1987
Released on J-STAGE: July 09, 2007
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[in Japanese]1987 Volume 60 Issue 8 Pages 433-440
Published: 1987
Released on J-STAGE: July 09, 2007
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[in Japanese]1987 Volume 60 Issue 8 Pages 441-446
Published: 1987
Released on J-STAGE: July 09, 2007
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[in Japanese]1987 Volume 60 Issue 8 Pages 447-456
Published: 1987
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSDownload PDF (1087K) -
[in Japanese]1987 Volume 60 Issue 8 Pages 457-459
Published: 1987
Released on J-STAGE: July 09, 2007
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[in Japanese], [in Japanese], [in Japanese], [in Japanese]1987 Volume 60 Issue 8 Pages 460-462
Published: 1987
Released on J-STAGE: July 09, 2007
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Eisuke YAMADA, Shinji INAGAKI, Hiroshi OKAMOTO, Junji FURUKAWA1987 Volume 60 Issue 8 Pages 463-468
Published: 1987
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSAluminum carboxylates having hydroxy or amino-group as active filler were prepared by the reaction of corresponding sodium carboxylates with aluminum chloride. The physical properties of NBR, SBR, BR and EPDM vulcanizates compounded with these were measured. It was recognized that the tensile properties and the abrasion and the flex fatigue resistance of all rubber vulcanizates were improved by compounding with aluminum paminobenzoate. Especially, the reinforcing effects of these active fillers for NBR with carboxylic acid group were remarkable compared with other vulcanized rubbers. From the results of the analysis of the stress-strain curves and crosslinking densities, the mechanism of the action on these active aluminum carboxylates were discussed.View full abstractDownload PDF (553K) -
Tadaoki OKUMOTO, Masatoshi SUGIMOTO, Takao KONDO1987 Volume 60 Issue 8 Pages 469-475
Published: 1987
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSAcrylic polymers containing both epoxide and carboxyl group have been studied by use of alkyltrimethylammonium salts. As the cure site monomers of acrylic polymers allylglycidylether and methacrylic acid were used, and these monomers were copolymerized with main acrylic monomers such as ethylacrylate, butylacrylate and 2-methoxy-ethylacrylate.
Alkylammonium salts with chlorine, bromide and iodide were carried out for studying the cure rate and physical properties. In the ammonium salts, octadecyltrimethylammonium bromide (OTABr) were showed superior properties to other halogenes. However, because of having the high cure rate of ACM compound by use of OTABr, 1, 3-diphenylguanidine (DPG) as the retarder in various guanidines was choosed to improve the cure rate. Then the studies of the compounding recipe by combination of OTABr and DPG were carried out for obtaining the relations between the cure rate and the physical properties. Accordingly, the mechanism of the crosslinking by use of OTABr and DPG were discussed.View full abstractDownload PDF (687K) -
Norio TSUBOKAWA, Kazuhide KITA, Yasuo SONE1987 Volume 60 Issue 8 Pages 476-481
Published: 1987
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSIn the presence of polystyrene-grafted (CB-PS), poly- (methyl methacrylate) -grafted (CB-PMMA), polyester-grafted (CB-PEs), and poly (β-alanine) -grafted (CB-PAL) carbon black, the cationic polymerization of styrene initiated by stannic chloride was investigated. A marked retardation of the polymerization was observed in the presence of untreated carbon black depending on the reaction of growing polymer cation with oxygen containing group on carbon black. The retardation by carbon black did not disappear even if the oxygen containing groups on carbon black were blocked by the treatment with 2, 2′-azobisisobutyronitrile-diazomethane or with sodium borohydride. On the contrary, in the presence of the above polymer-grafted carbon black, the retardation by carbon black was weakened gradually with an increase in the grafting ratio of polymer. In particular, in the presence of CB-PAL (grafting ratio=205.8%), the retardation almost completely disappeared. These phenomenon suggests that the oxygen containing group and benzonoidal ring on the surface were blocked by the grafted polymer chains. The ability of grafted polymer chain for the blocking of the carbon black surface was found to increase in the following order: PS<PMMA<PEs_??_PAL. This order was in agreement with that of decreasing solubility of the grafted polymer chain in the solvent of the polymerization.View full abstractDownload PDF (666K) -
[in Japanese]1987 Volume 60 Issue 8 Pages 482-483
Published: 1987
Released on J-STAGE: July 09, 2007
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