All issues
Predecessor
Volume 57, Issue 3
Displaying 1-7 of 7 articles from this issue
- |<
- <
- 1
- >
- >|
-
Microstructure in Resin ProcessingMasaru UEMURA1984 Volume 57 Issue 3 Pages 111-117
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSIt is often found out that the layer peeling takes place in resin processing with the composite system of high impact rubber-plastics, but no cause has been cleared yet. In the previous study, 1) the same phenomenon of layer peeling during processing was reported on EVA-AS graft copolymer.
The free EVA particle becomes easy to flow in AS continuous phase which is resulted in the phase delamination. It is cleared that the layer peeling can be avoided by means of solidifying steadily EVA particle in AS continuous phase either with increasing graft degree and/or by crosslinking.
In this report, the phase peeling phenomenon in processing was further studied on morphological microstructure by electron microscopy.
EVA particle can not be steadily dispersed by suspension polymerization, but can be conducted either by bulk-suspension or in the ester-exchanged bulk-suspension method.View full abstractDownload PDF (1871K) -
Yasukazu YOKOYAMA, Takashi SAITOH, Fumio ARAI1984 Volume 57 Issue 3 Pages 118-123
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSFastness properties and absorption spectra of quinacridone (1), pyrido [1′, 2′ : 1, 2] pyrimido [4, 5-b] acridine-7, 15-dione (2), and pyrido [2, 1-b] pyrido [1′, 2′ : 1, 2] pyrimido [4, 5-g] quinazoline-7, 15-dione (3) have been investigated to elucidate the relationship between their durability and the chemical constitution. Light fastness, heat resistance, and resistance to acids decrease with increasing the number of quinazolone moiety in the following order (1), (2), (3). The quinazolone moiety is more labile than the acridone one which is stabilized by intermolecular hydrogen bond. The additive properties on the durability and the absorption spectra are observed. The improvements of the resistance to acids and light fastness of (2) and (3) are also investigated by means of microencapsulation.View full abstractDownload PDF (829K) -
The effects of coupling types of high frequency discharge and stirring speedTatuhiko IHARA, Seisirô ITÔ, Tosihide KUWAHARA, Mitsuo KIB ...1984 Volume 57 Issue 3 Pages 124-129
Published: 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSLow temperature plasma oxidization treatment of carbon black was examined with two different coupling types of high frequency discharge about the effects of coupling types for treating efficiency ; one is conductive coupling and the other is capacitive coupling for evolving the plasma. The effect of stirring speed during the plasma treatment was also investigated and the plasma oxidation mechanism was discussed.
The treating efficiency in the case of inductive coupling was better than the other. Stirring speed affected to the kind and the amount of surface groups formed.' When the stirring was accomplished vigorously, mainly week acidic phenolic hydroxyl groups were formed, and when the stirring was accomplished mildly, mainly strong acidic carboxyl groups and lactone type carboxyl groups were formed. It was assumed that the formation of phenolic hydroxyl groups was mainly due to autoxidation reaction of carbon black with radical formed on the carbon black surface and oxygen molecules, and formation of carboxyl groups was due to opening of aromatic ring with phenolic hydroxyl group.View full abstractDownload PDF (855K) -
A Binary Oil-Wax SystemHajime MATSUDA, Keiichi UEHARA, Kazuo TOKUBO, Muneo TANAKA1984 Volume 57 Issue 3 Pages 130-136
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSAn attempt has been made to elucidate the mechanism of sweating for the lipstick, which is a stick-type cosmetic mainly containing oil, wax and pigments.
The component of droplets generated on the surface of the lipstick and the dependence of sweating on temperature were examined by using a simple oil-wax system without pigments.
Predominant component of droplets was found to be oil contained in the lipstick. Sweating was caused to separate oil from oil-wax matrix on the surface of the lipstick. The droplets were observed to be generated and re-absorbed through the same channels on the surface by the use of a microscope.
The measurement of the expansion coefficients of oil and wax indicated that sweating was due to the expansion of oil with increasing temperature. The increase of wax in the lipstick led to the decrease of droplets. This fact suggested that there was the close relation between sweating and oil-wax matrix.View full abstractDownload PDF (1450K) -
Masumi KOISHI1984 Volume 57 Issue 3 Pages 137-141
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (601K) -
Keizo OHTA1984 Volume 57 Issue 3 Pages 142-147
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (626K) -
Mitsuo SASAMOTO1984 Volume 57 Issue 3 Pages 148-154
Published: March 20, 1984
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (875K)
- |<
- <
- 1
- >
- >|