-
SHU KAMBARA
1974Volume 30Issue 3 Pages
P57
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
KOHEI HOSHINO
1974Volume 30Issue 3 Pages
P58
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
TOSHIO HOSHINO
1974Volume 30Issue 3 Pages
P59-P60
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YOSHIKAZU AOKI
1974Volume 30Issue 3 Pages
P61
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
ICHIRO SAKURADA
1974Volume 30Issue 3 Pages
P62
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
KIYOYUKI SUZUE
1974Volume 30Issue 3 Pages
P63
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YOSHISATO FUJISAKI
1974Volume 30Issue 3 Pages
P64-P65
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
MASAHIDE YAZAWA
1974Volume 30Issue 3 Pages
P66-P67
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
JIRO SHIMEHA
1974Volume 30Issue 3 Pages
P68
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
TOMOAKI TAGAWA
1974Volume 30Issue 3 Pages
P69
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YOSHIHISA ITO
1974Volume 30Issue 3 Pages
P70-P71
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
SHOGO NAKAJO
1974Volume 30Issue 3 Pages
P72
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
KESAHARU KASUGA
1974Volume 30Issue 3 Pages
P73-P74
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
SACHIHIKO TACHIBANA
1974Volume 30Issue 3 Pages
P75
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
ZENZABORO TSUKUMO
1974Volume 30Issue 3 Pages
P76-P77
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YASUSHI KOBAYASHI
1974Volume 30Issue 3 Pages
P78
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
HACHIRO HIYAMA
1974Volume 30Issue 3 Pages
P79-P80
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
TADANAO MITSUI
1974Volume 30Issue 3 Pages
P81-P82
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YUTAKA SUZUKI
1974Volume 30Issue 3 Pages
P83-P88
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Jiro Simizu, Kozo Shimazaki
1974Volume 30Issue 3 Pages
T87-T95
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
Polypropylene crystallizes in the monoclinic form in slow cooling, and in the pseudo-hexagonal (smectic) in rapid cooling. In melt spinning of polypropylene, we found out that the undrawn filament with high birefringence is obtained by rapid cooling before the crystallization begins in the filament (i. e. before the remarkable increase in the birefringence takes place.)
This rapid-cooled filament is consisted of the highly oriented small paracrystals (smectic modification).
When the rapid cooling was made, even in low take-up speed, the elongation decreases and the apparent strength becomes higher as compared with the filament made by the conventional spinning.
The cold-drawing of the rapid-cooled filament at low draw ratio is accompanied by further increase in the apparent strength and the decrease in the breaking elongation.
These rapid cooling effect of spun filament is influenced by the spinning stress and filament temperature just before the cooling, however, the melt temperature is the important in our experiment. At low melt temperature, we could not observe remarkable rapid cooling effect in spite of the occurrence of the smectic structure, and thus the melt temperature is considered to play an important role for the cooling effect.
From the result of the molecular degradation by increase of melt temperature, it is considered that the decrease in the molecular weight should be concerned with the movability of molecules, which should contribute to the high orientation of paracrystals.
View full abstract
-
AKIHIDE KAWAMURA
1974Volume 30Issue 3 Pages
P89-P93
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Prospects of its Production, Trade and Price
KAORU WATANABE
1974Volume 30Issue 3 Pages
P94-P98
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Hiroshi Ishikawa, Kiyoshi Hirabayashi, Hideo Morooka
1974Volume 30Issue 3 Pages
T96-T101
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
Thermal properties of sericin have been studied by means of DSC method. The results obtained are summarized as follows:
1. Soluble sericin with a low crystallinity gave a DSC curve where an endothermic main peak and a shoulder were observed at ca. 220°C to 230°C and ca. 250°C, respectively. The soluble sericin became highly crystalline by swelling in water and gradually drying. The crystalline sericin obtained showed a main peak at ca. 250°C and a shoulder at ca. 220 to 230°C on the DSC curve, subsequently the solubility of the specimen decreased remarkably, i. e. hardly soluble or insoluble sericin.
2. It has been found from the DSC analysis that quickly dried sericin was a soluble type and gradually dried one was a insoluble type.
3. The insoluble part of sericin in water found to be an insoluble type of sericin in cocoon filament.
View full abstract
-
FUJIO BEKKU
1974Volume 30Issue 3 Pages
P99-P101
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
MASAO ISHIKAWA
1974Volume 30Issue 3 Pages
P102-P105
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Masahiro Hosoi, Isamu Kuriyama, Toru Kawai
1974Volume 30Issue 3 Pages
T102-T106
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
The effect of stirring on the polymerization of ethylene induced by γ-irradiation in a gaseous phase was studied with regard to the morphological features and the physical properties of resultant polymer. The melting temperature, the heat of fusion, the density and the content of CH
3 groups of the polymers formed were independent of the stirring speed, but the specific surface area of the material showed a minimum in the range of 200-500 rpm. Similarly, the viscosity-average molecular weight showed a minimum at a speed of ca. 200 rpm. GPC molecular weight distributions showed double peaks which is characteristic of low-temperature polymerization product. The higher molecular weight species increased with increased stirring speed. The fibrillar morphologies observed under a scanning type electron microscope increased drastically with increased stirring speed. Close inspection of these fibrils revealed that many nodese fibers were produced by a partial unfolding of molecules in the lamellar crystals. It is likely that the increase of fiber-like structures leads to the increase in the specific surface area of the resultant polymers, so that the number of contact of long-lived radicals in the resultant polymeric solid with monomers increases, giving rise to the chain growth and the grafting, which produces long chain branches, and consequently the polymerization rate is accelerated.
View full abstract
-
EIJIRO SUGANO
1974Volume 30Issue 3 Pages
P106-P109
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Saburo Okajima, Tadashi Yoshii, Nobuyoshi Sakuma
1974Volume 30Issue 3 Pages
T107-T113
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
In order to study the dyeing property of Spandex, diffusion of p-nitroaniline (PNA) and p-aminoazobenzene (PAAB) and stress relazation of the samples (F-70 and T-280) were studied both at
T=40-90°C in the dry state and following results were obtained.
(1) Diffusion coefficient
D vs. 1/
T is expressed by two lines intersecting at
Td=64-66°C, Apparent activation energy of diffusion (
ΔEd) is estimated to be about 18-20kcal/mol and 40kcal/mol for
T>
Td and
T<
Td, respectively.
ΔEd is slightly larger for PAAB than for PNA.
(2) Reduced relaxation modulus vs. log
t superposable to yield a master curve. Logarithm of shift factor
aT vs. l/
T is also linear and having a break at
Tr, which is in good accordance with
Td. Activation energy of relaxation (
ΔEr) is close to the value of corresponding
ΔEd.
(3) Log
D vs. log
aT is linear and breaks at the corresponding temperature with
Td or
Tr. The slope of the line fluctuates slightly in the vicinity of unity as required by the theory.
(4) Both
D vs.
T and
aT vs. T obey to the WLF formula, where the observed parameters
c_??_ and
c_??_ are close to the theoretical values for
T>Td(Tr) but larger for
T<Td(Tr).
(5) The above mentioned behaviors of F-70 are very similar to those of T-280, although the former is of ester type while the latter is of ether type.
It is concluded that the soft segment behaves as similarly as amorphous polymers above
Tg especially at temperature higher than
Td or
Tr.
View full abstract
-
TAKASHI AKAMATSU
1974Volume 30Issue 3 Pages
P110-P116
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Takeo Sone
1974Volume 30Issue 3 Pages
T114-T119
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
In the previous study it was pointed out that poly (ethylene terephthalate) (PET) fiber treated with high concentrated sulfuric acid had good dyeing properties not only for a cationic dye but also for disperse dye.
This study was attempted to clarify the relation between treating conditions of PET fibers with sulfuric acid and tensile strength or amount of disperse dyes adsorbed in the fibers.
Sulfation of PET fibers was carried out with wider treating conditions than that of on the previous study, i. e. the sulfation was carried out with sulfuric acid of 70_??_77% at 90_??_100°C for 1_??_180 min. The reason for the high affinity of sulfated PET fibers to disperse dyes was also discussed.
The fiber prepared with suitable condition has good dyeing properties and good fastness against light and washing. The tensile strength of fiber thus prepared is just as high as that of untreated fibers.
View full abstract
-
JIRO SHIMIZU
1974Volume 30Issue 3 Pages
P117-P122
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
Kaoru Yamaki, Kenji Shinagawa
1974Volume 30Issue 3 Pages
T120-T125
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
In this study the tensile testing was made as a function of direction for the triaxial fabrics with 48 yams made by a braiding machine. In the testing, the specimens with different directions from the machine direction were taken out and provided the measurements of the load-elongation curves in the light load.
The results were compared with those of the arthogonal fabrics.
The following conclusions are obtained:
1) The cover factor of triaxial fabrics is shown as;
then α=60 and
C=67%.
2) The ratio (
n) of the specimen length to chack width and the angle θ between the axis and yarn are varied, the number of kinds of yarns holding both ends is varied between 0_??_3, as shown in Fig. 5.
3) When experiments are made at
n=1, triaxial fabrics have less directional properties with regard to the load-elongation than orthogonal fabrics.
View full abstract
-
KATSUJI HONDA
1974Volume 30Issue 3 Pages
P123-P126
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
GORO KONDO
1974Volume 30Issue 3 Pages
P127-P129
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
TAKUMA OBA
1974Volume 30Issue 3 Pages
P130-P132
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
NOBORU OGUCHI
1974Volume 30Issue 3 Pages
P133-P136
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
MAKOTO KURITA
1974Volume 30Issue 3 Pages
P137-P140
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
SHOJI MAKISHIMA
1974Volume 30Issue 3 Pages
P141-P144
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
HIROTARO KAMBE
1974Volume 30Issue 3 Pages
P145-P147
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
SAKIO IKEDA
1974Volume 30Issue 3 Pages
P148-P152
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
AKIRA OKADA
1974Volume 30Issue 3 Pages
P153-P159
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
MASAMITSU TANIMURA
1974Volume 30Issue 3 Pages
P160-P166
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
AKIRA SHINOHARA
1974Volume 30Issue 3 Pages
P167-P171
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
OSAMU ISHIZUKA
1974Volume 30Issue 3 Pages
P172-P177
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
KAZUHISA HARAKAWA
1974Volume 30Issue 3 Pages
P178-P182
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
GEN-ICHI YOSHIMURA
1974Volume 30Issue 3 Pages
P183-P186
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
TOMOHIDE YASUMURA
1974Volume 30Issue 3 Pages
P187-P198
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
HIROSHI ASAOKA, TAKEO NAGASAWA
1974Volume 30Issue 3 Pages
P199-P206
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS
-
YOSHIO SUDA
1974Volume 30Issue 3 Pages
P207-P212
Published: March 10, 1974
Released on J-STAGE: November 28, 2008
JOURNAL
FREE ACCESS