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Volume 62, Issue 4
Displaying 1-8 of 8 articles from this issue
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[in Japanese]1989 Volume 62 Issue 4 Pages 193-203
Published: 1989
Released on J-STAGE: April 16, 2008
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[in Japanese]1989 Volume 62 Issue 4 Pages 204-214
Published: 1989
Released on J-STAGE: April 16, 2008
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[in Japanese]1989 Volume 62 Issue 4 Pages 215-220
Published: 1989
Released on J-STAGE: April 16, 2008
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[in Japanese], [in Japanese]1989 Volume 62 Issue 4 Pages 221-230
Published: 1989
Released on J-STAGE: April 16, 2008
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[in Japanese]1989 Volume 62 Issue 4 Pages 231-234
Published: 1989
Released on J-STAGE: April 16, 2008
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Masako WATANABE, Akira SEKIYA, Hiroyasu ISHIDA, Masanori TAMURA, Sabur ...1989 Volume 62 Issue 4 Pages 235-241
Published: 1989
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSNew elastomers with elasticity of chlorosulfonated polyethylene (CSM) and water absorbability of polyethylene glycol having terminal amino groups (PGD) were synthesized by the treatment of the graft reaction mixture of CSM and PGD with polyfunctional epoxides in various reaction conditions. Water absorbability, tensile strength and elongation of the elastomers were investigated. PGD content in films increased and the elastomers which possess excellent elasticity and water absorbability were obtained. The results of DSC and X-ray diffraction of the elastomers, suggested that the microphase separation, giving rise to a micro-domain structure of PGD, takes place in the all case of using epoxides.View full abstractDownload PDF (477K) -
Yuko IKEDA, Shoichi TAKESAKO, Shinzo KOHJIYA, Shinzo YAMASHITA, Iwao Y ...1989 Volume 62 Issue 4 Pages 242-249
Published: 1989
Released on J-STAGE: April 16, 2008
JOURNAL FREE ACCESSSegmented polyurethane (SEU) was synthesized from hydroxylterminated poly (oxyethylene)-poly (oxytetramethylene)-poly (oxyethylene) triblock copolyether, 4, 4'-diphenylmethane diisocyanate and ethylene glycol by the prepolymer method. Antithrombogenicity of SEU evaluated by the Lee-White coagulation test and by the platelet adhesion test was found to be better than that of segmented polyurethane based on poly (oxytetramethylene) (SPU). The SEU also exhibited low modulus at elongation of 300-400% and a good hydrolytic stability up to six months. The value of C2 derived from the Mooney-Rivlin Plot of stress-strain curve was found to decrease with the increase of oxyethylene (EO) content in the prepolymer. The stress relaxation measurement in normal saline solution at 37°C revealed that the stress relaxation of SEU was smaller than that of SPU. These findings were interpreted in terms of the better microphase separation and of the more hydrophilic nature of SEU than those of SPU owing to the introduction of poly (EO) units in the prepolymer.View full abstractDownload PDF (553K) -
1989 Volume 62 Issue 4 Pages 250-251
Published: 1989
Released on J-STAGE: April 16, 2008
JOURNAL RESTRICTED ACCESSDownload PDF (197K)
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