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Volume 64, Issue 8
Displaying 1-10 of 10 articles from this issue
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[in Japanese]1991 Volume 64 Issue 8 Pages 463-471
Published: 1991
Released on J-STAGE: July 09, 2007
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[in Japanese]1991 Volume 64 Issue 8 Pages 472-482
Published: 1991
Released on J-STAGE: July 09, 2007
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[in Japanese]1991 Volume 64 Issue 8 Pages 483-496
Published: 1991
Released on J-STAGE: July 09, 2007
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[in Japanese]1991 Volume 64 Issue 8 Pages 497-500
Published: 1991
Released on J-STAGE: July 09, 2007
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[in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...1991 Volume 64 Issue 8 Pages 501-504
Published: 1991
Released on J-STAGE: July 09, 2007
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[in Japanese]1991 Volume 64 Issue 8 Pages 505-507
Published: 1991
Released on J-STAGE: July 09, 2007
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Kunihiko FUJIMOTO, Iwao SAITOH1991 Volume 64 Issue 8 Pages 508-515
Published: 1991
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSIn this study, we derived theoretical equations on the restoration of dynamic modulus in a free state, after breaking the physical bonds by stressing along the principal axis of sloped eight layered nylon fiber filled FRR, that has a matrix of carbon black filled NR, modeling the restorative process of broken physical bonds. Restorative activation energies of broken physical bonds have a constant value independent from the amount of broken physical bonds. The matrix phase changes to stable structure by vibrative energy, and, restored physical bonds and restored dynamic moduli are smaller than those for initial states.View full abstractDownload PDF (829K) -
Kenji ITOYAMA, Kenji ITOYAMA, Shiro MATSUNAGA1991 Volume 64 Issue 8 Pages 516-521
Published: 1991
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSGPC and intrinsic viscosity, [η] were measured for the samples prepared by the polymerization with various amounts of chain transfer reagent, n-DDM (n-dodecylmercaptan). Data were analysed by the GPC-intrinsic viscosity method developed by Kurata, Benoit, Coleman et al. and were obtained number averaged molecular weight Mn, weight averaged molecular weight Mw, and long chain branching parameter λ. The existance of n-DDM was clarified to be effective to reduce the number of branching. The dependence of the branching on conversion is also shifted by the amount of n-DDM. Then, it was concluded that n-DDM is effective not only to regulate primary molecular weight but also to hinder branching.View full abstractDownload PDF (582K) -
Souji KODAMA, Hitoshi KAWASAKI, Kazuta MITSUISHI, Katsushi NISHI1991 Volume 64 Issue 8 Pages 522-527
Published: 1991
Released on J-STAGE: July 09, 2007
JOURNAL FREE ACCESSStyene-butadiene rubber (SBR) was modified with γ-mercaptpropyltrimethoxysilane (γ-MPS) by photo graft reaction for improvement of mechanical properties of silica filled vulcanizates. It was possible to modify the SBR compounded γ-MPS and photo-initiator, for example benzophenone, under irradiation of the UV fluorescent lamp. The mechanical properties of modified valcanizates were superior to non-modified one. It was clear that this modification remarkably improved the interaction between SBR and silica from the result of the bound rubber thickness estimated by Pliskin′s method. However, because of rubber gelation, compounding must be done immediately after irradiation, and some antioxidants disturbed this modification.View full abstractDownload PDF (616K) -
[in Japanese]1991 Volume 64 Issue 8 Pages 528-529
Published: 1991
Released on J-STAGE: July 09, 2007
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