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Volume 37, Issue 12
Displaying 1-14 of 14 articles from this issue
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1981 Volume 37 Issue 12 Pages T536a
Published: 1981
Released on J-STAGE: November 28, 2008
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1981 Volume 37 Issue 12 Pages T536b
Published: 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSDownload PDF (56K) -
OSAMU WADA1981 Volume 37 Issue 12 Pages P429-P435
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
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HATSUHO UEDAIRA1981 Volume 37 Issue 12 Pages P436-P443
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
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TAKASHI IGARASHI1981 Volume 37 Issue 12 Pages P444-P448
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
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RYOICHI SAKURAI1981 Volume 37 Issue 12 Pages P449-P455
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
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YOSHIMITSU NAKAMURA1981 Volume 37 Issue 12 Pages P456-P464
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
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Hiroshi Yasuda, Hiroshige Sugiyama1981 Volume 37 Issue 12 Pages T497-T501
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSSimulation on the yarn irregularity and break was performed by using the steady-state single filament melt spinning theory described in a previous report (Part 1).
Following results are obtained; (1) Linear density variation of as-spun yarn depends upon both the calculated value of 1/V (dV/dx) as response and the extent of disturbance of cooling air at the maximum point of this value, (2) Spinning instability which is caused by the twitching beneath the orifice increases with the increase of spinning temperature and is simulated by introducing the calculated value of the stress beneath the orifice as response, (3) Simulation of unevenness properties of as-spun yarns among the nozzles is performed by calculating the dependency of out-put values, for example, σ95 on any spinning conditions. When dependency is large, unevenness is simulated to be severe, (4) Brittle rupture of yarn is estimated by the value of the yarn stress after perfect cooling.View full abstractDownload PDF (332K) -
Mitsunobu Chino, Minoru Tanaka, Megumu Suzuki1981 Volume 37 Issue 12 Pages T502-T508
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe bending angles of warp and weft yarns in the cloth on loom were measured. The results were compared with a theory on shrinkage of cloth. When the weft yarn tension was kept constant, the warp bending angles decreased and the weft bending angles increased with the increase of warp tension on loom. The bending angles depended on the yarn count, the flexural rigidity of yarn, and the configuration of yarn deformed by the lateral load. The theory well explained these results.View full abstractDownload PDF (1797K) -
Eiichi Maekawa, Ikuo Ueno, Tetsuo Koshijima1981 Volume 37 Issue 12 Pages T509-T515
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESS2, 3-Dicarboxy cellulose oxidized to nearly 100% of the theoretical was prepared by the selective oxidation of commercial cellulose powder with periodate, and by following oxidation with acidified sodium chlorite solution.
The 2, 3-dicarboxy cellulose prepared was completely soluble in water, but formed precipitate or massive solid in the aqueous solution of most metallic ions other than alkali metals.
2, 3-Dicarboxy cellulose metallic salts of metallic ions having 6Å effective ionic radii in an aqueous medium gave sticky, gel-like products on heating with addition of water.
Thermal analyses of these products showed that 2, 3-dicarboxy cellulose metallic salts had higher thermal stability than the original dicarboxy cellulose, and that considerable differences in the thermal stability depended on the kind of metallic ion. From a view point of the thermal stability, the zinc salt was the highest and the copper one the lowest. On the other hand, calcium salt had the anomalous thermal behavior.View full abstractDownload PDF (483K) -
Toru Taga, Hiroshi Inagaki1981 Volume 37 Issue 12 Pages T516-T522
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSGraft copolymerization of methyl methacrylate onto cellulose samples, whose reducing end group C1-C2 glycol had been oxidized, was carried out by using an aqueous solution of Ce (NO3)6 2NH4 as the initiator in the absence of mineral acid. The elimination of C1-C2 glycol did not inhibit the graft copolymerization but lowered the percentage of grafting. This result implies that both C1-C2 glycol and C2-C3 glycol acted as grafting sites and the function of C2-C3 glycol as grafting sites was inferior to that of C1-C2 glycol. Under a condition that redox reaction between cellulose and ceric ion could hardly proceed a large amount of homo poly (methyl methacrylate) (PMMA) was formed in the cellulose matrix. Truly grafted PMMA side-chains were isolated from graft products by using a combined technique of thin-layer chromatography and hydrolysis of cellulose backbone. This technique was not so valid as in the case of styrene/cellulose graft copolymerization.View full abstractDownload PDF (592K) -
Yoshiaki Shimizu, Mitsuo Kimura1981 Volume 37 Issue 12 Pages T523-T527
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSAdsorptions of neutral salts and acids by polyamide were studied by measuring the heat using a flow type micro calorimeter. The adsorption heat of neutral salts was comparable to that of acids. The approximately equal heats were observed for salts having the same anion. The salt prevented the acid from adsorption owing to the electrical effect. When a salt was replaced by an acid on polyamide, the heat was certainly detected. By the replacement with another salt, however, the heat was hardly detected. The affinity of adsorption of proton was large. The entropy of adsorption was positive and large. The plots of -ΔH°ion against -ΔH°hy-ion and the plots of ΔS°ion, against Δδion were linear for a series of halogen ions.View full abstractDownload PDF (349K) -
Takuma Teshirogi, Hideo Kusaoke, Munenori Sakamoto, Hiroaki Tonami1981 Volume 37 Issue 12 Pages T528-T532
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESSThe anticoagulant activity of sodium aminopolysaccharide sulfates was tested in vitro by Lee and White method. All of them showed an activity in delaying coagulation of blood. Several sodium aminodeoxycellulose sulfates had higher anticoagulant activity than all of the commercial anticoagulants except for sodium heparinate.
Some films prepared by treating sodium aminodeoxycellulose sulfates with formalin or polyvinyl alcohol also had an anticoagulant activity.View full abstractDownload PDF (284K) -
Kunio Nakamura, Tatsuko Hatakeyama, Hyoe Hatakeyama1981 Volume 37 Issue 12 Pages T533-T535
Published: December 10, 1981
Released on J-STAGE: November 28, 2008
JOURNAL FREE ACCESS
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