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Volume 65, Issue 11
Displaying 1-7 of 7 articles from this issue
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Natsukaze SAITO, Isao KIMURA, Masato TANAKA1992 Volume 65 Issue 11 Pages 665-670
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSIt was investigated whether a few pigments were encapsulated by soap-free emulsion polymerization of methyl methacrylate or not.
Pigments examined here were carmine 6 B (Index number 15850), disazo-yellow (Index number 21100), copper phthalocyanine blue (Index number 74160).
A few surfactans were added together with the pigments.
The surfactants added were poly (vinyl alcohol) (PVA) sodium dodecyl-benzenesulfonate, sodium dodecyl sulfate.
The size distributions of pigments before and after encapsulation and the effect of the pigments on the state of encapsulation were mainly investigated.
The state of encapsulation was estimated by SEM and EPMA. Disazo-yellow and copper phthalocyanine blue were encapsulated extremely well by using PVA as a surfactant.
Carmine 6 B could not be encapsulated even by using all the surfactants.View full abstractDownload PDF (1201K) -
Hiroaki TADA, Yasuhiro SAITO, Masato HYODO1992 Volume 65 Issue 11 Pages 671-675
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSVan der Waals potentials (VDWP) between insulator-coated particles grafted with polymers were calculated on the basis of a bilayer model formulated by the Vold theory. As the result, the absolute value of the VDWP decreased with increasing amount of the grafted polymer and was dependent on the kind of the insulator. Moreover, it was indicated that a part of the experimental results on the dispersion stability of the particles can be reasonably explained in terms of the magnitude of the calculated VDWP.View full abstractDownload PDF (587K) -
Yoshimi TANAKA, Yasuo KONDO, Masayuki NOGAMI, Kensaku OGAWA1992 Volume 65 Issue 11 Pages 676-683
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSAl-, Ti-and Zr-alkoxide solutions were dip-coated on plastic sheets such as polycarbonate (PC), polypropylene (PP), poly (vinyl chloride), polyacetal and polyimid, followed by heating to form transparent inorganic films. Films were homorogeneous and were tightly adhered on the plastic substrates, although many microcracks were obsreved. IR and XRD results showed that films consisted of amorphous metal oxide or hydroxide (Ti02, Zr02 or AL00H) containing of OH and a small amount of organic substance. Films prepared from Ti-alkoxide solution had a maximum tensile shear adhesive strength of 4. 4 kgf/cm2 on PP. The film on PC, which increased stability of PC against UV-light irradiation, showed adhesive strength higher than 14 kgf/cm2. ESCA results of films prepared from Ti-alkoxide solution indicated a different composition between film surface and film/plastic interface. The increased adhesive strength for PP was explained from the ESCA results.View full abstractDownload PDF (1123K) -
I. SEKINE, M. YUASA, K. TANAKA, M. FUKE, L. SILAO1992 Volume 65 Issue 11 Pages 684-691
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSThe corrosion protective properties of polymer resins coated on steel after chemical conversion treatment in molybdate-phosphate systems were evaluated by AC impedance measurement and scanning vibrating electrode technique (SVET). The steel was chemically treated with Na2MoO4 and a phosphate, such as Na6P4O13, Na5P3010, C2H8P207 (HEDP), H3PO 3 or H3PO4, and was coated with epoxy resin (EP), poly (vinyl chloride) resin (VC) and fluoro resin (F). The most efficient solution for the chemical conversion treatment was found to be a O.5 M Na2MoO4-10% Na6P4013 aqueous solution of pH 10, and the most efficient immersion time was 6 hours. The corrosion protective property of specimen coated with F resin paint on the chemically treated steel plate was excellent compared with that on the non-treated or the Na2CrO4 (0.5 M) -treated steel plate. The film resistance (Rf) from AC impedance measurement and the current density (i) from SVET were correlated with each other. It was found that the corrosion protective property of paint film could be evaluated by SVET.View full abstractDownload PDF (833K) -
Tohoru HIRAYAMA1992 Volume 65 Issue 11 Pages 692-699
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1180K) -
Masakazu SUZUKA1992 Volume 65 Issue 11 Pages 700-710
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1172K) -
theory and typeKazuo TAZIMA1992 Volume 65 Issue 11 Pages 711-720
Published: November 20, 1992
Released on J-STAGE: November 20, 2012
JOURNAL FREE ACCESSDownload PDF (1265K)
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