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YOSHIKIMI UYAMA, NAOHIDE TOMITA, YOSHITO IKADA
1993 Volume 6 Issue 3 Pages
325-330
Published: 1993
Released on J-STAGE: August 04, 2006
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A heat-contractile tube was plasma-treated and subsequently surface-grafted with a water-soluble monomer. The surface graft polymerization of the monomer was performed in the presence of a small amount of riboflavin with the photo-induction method which required neither degassing process nor heating. The grafted surface was found to become almost permanently very hydrophilic and slippery when brought into contact with water. The role of riboflavin on the graft polymerization in an aerated monomer solution was also discussed.
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MAKOTO ONISHI, KENICHI SHIMURA
1993 Volume 6 Issue 3 Pages
331-336
Published: 1993
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The aim of this study is to prepare materials with lubricious surfaces to be used in the manufacture of invasive medical devices such as catheters thus to minimize injury and patient discomfort during application. A water-soluble polymer, poly(N, N-dimethylacrylamide) (PDMAA), has been grafted onto the films of poly(ethylene terephthalate), polyethylene and polypropylene to render their surfaces lubricious. After exposing the films to argon plasma, the films were allowed to react with DMAA vapor to produce the graft polymer (plasma-graft). PDMAA grafted surfaces, characterized by ESCA and IR, had a low friction coefficient when wet, and the lubricity was durable. The plasma-graft onto the surfaces pretreated with benzoyl peroxide enriched the PDMAA at the outermost surface and made the surface more lubricious than untreated ones.
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MASAMITSU KURIAKI
1993 Volume 6 Issue 3 Pages
337-338
Published: 1993
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Satiko OKAZAKI, Masuhiro KOGOMA
1993 Volume 6 Issue 3 Pages
339-342
Published: 1993
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HIDETOSHI KITA, KAZUHIRO TANAKA, KEN-ICHI OKAMOTO, ISAO KAWAFUNE
1993 Volume 6 Issue 3 Pages
343-350
Published: 1993
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Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) has been treated with a glow discharge plasma containing CF
4, CF
4/H
2 or Ar and the chemical composition and structure of plasma-treated surface layer of PTMSP were examined with Fourier transform infrared spectroscopy-attenuated total reflection (FTIR-ATR) and X-ray photoelectron spectroscopy (XPS) studies. Gas permeation behavior of plasma-treated PTMSP were also reported. The series resistance model was used to estimate the transport properties of the fluorinated polymer layer. The fact that plasma fluorination of PTMSP leads to a reduction in permeation rate of O
2 and N
2 accompanied by a significant increase in selectivity of O
2 to N
2 is especially interesting from a standpoint of membrane separation,
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Akira KOJIMA, Takeo OHTE, Sugio OHTANI
1993 Volume 6 Issue 3 Pages
351-352
Published: 1993
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Shizuo KUBOTA, Kozo EMORI
1993 Volume 6 Issue 3 Pages
353-360
Published: 1993
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Cotton fiber was modified by low temperature plasma of air, oxygen and argon. The modification speed with 13.56MHz-waves was faster than it was with 20KHz- waves. The modification speeds, in descending order, were as follows: oxygen>air>argon plasma.
When the cotton fiber was modified by low temperature plasma treatment, flexual rigidity decreased and ductility increased. Water absorption increased, as did crease resistance, drying rate and degree of crystallinity. On the other hand, equilibrium moisture regain, K/S value of reactive dye and direct dye decreased. The soil release property developed through air and oxygen plasma treatment. From the ESCA spectra, it was found that the fiber surface quality was reformed from C-H bond< C-O bond as a result of oxygen and air plasma treatment, and from C-H bond > C-O bond by argon plasma treatment. With weight loss 18.69% by air plasma treatment, tear strength retention of treated cotton broad was 73.8% in warp and 77.0% in fill.
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TAKAO AKAGI
1993 Volume 6 Issue 3 Pages
361-370
Published: 1993
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Low temperature plasma has two effects, one is plasma treatment, etching, introduction of functional group, crosslinking, the other is plasma polymerization. And low temperature plasma does not change the bulky properties of polymer. Author studied the aplication of low temperature plasma to the fabric and the electric material.
Polyester fabric which has deep and vivid color, polyester fabric coated or laminated by polyurethane which has no defect of migrating out of dispered dyestuff, light interference fabric, polyester mesh screen fabric for printing the integrated circuit were developed by low temperature plasma.
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MASAYUKI KUZUYA, JUNJI NIWA, AKIHIRO NOGUCHI, KAIJUN XU
1993 Volume 6 Issue 3 Pages
371-374
Published: 1993
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SHIN-ICHI ISHIZAKA
1993 Volume 6 Issue 3 Pages
375-378
Published: 1993
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Masataka MURAHARA, Masayuki OKOSHI
1993 Volume 6 Issue 3 Pages
379-384
Published: 1993
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The chemical stability of fluororesin is attributed to the C-F bond composed. Thus, it is considered to pull out the fluorine atoms selectively from the area irradiated with an excimer laser light and to replace them with functional group depending on the purpose.
In this study, B(CH
3)
3 for oleophilic or B(OH)
3 for hydrophilic property was employed. As a result, the resin surface exposed by Patterned ArF laser light turned to be oleophilic or hydrophilic. The reformed two samples and stainless steel plate were bonded together with the epoxy bonding agent, and tensile strength tests were conducted. The strength was 130Kgf/cm
2
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Yuji HAMADA, Shunichi KAWANISHI, Masanobu NISHII, Yuichi SHIMIZU, Shun ...
1993 Volume 6 Issue 3 Pages
385-392
Published: 1993
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It was reported that excimer laser irradiation on ethylene- tetrafluoroethylene copolymer (ETFE) provides the changes of the chemical structure. Irradiation with an ArF laser at wavelength of 193nm formed polyene in a whole ETFE film, and with a KrF laser at wavelength of 248nm induced the carbonization of ETFE. On the other hand, the surface analysis by X-ray photoelectron spectroscopy made it clear that irradiation with the ArF and KrF lasers formed the oxidation products at the surface of the ETFE film. These chemical changes at the surface of the ETFE film induced by the laser irradiation were different from those at the bulk of the film. The result of the depth profiling measurement at the surface of the ETFE film indicated that the oxidation of ETFE induced by excimer laser irradiation proceeded at the surface, which resulted from the existence of oxygen in air.
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Keiko ITO, Masaharu MORIYASU, Hiromichi KAWASUMI
1993 Volume 6 Issue 3 Pages
393-400
Published: 1993
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The photoablative behavior of polyimide irradiated by short pulse lasers whose wavelengths are 248nm, 266nm, 532nm, and 1064nm has been studied for drilling viaholes on the high density circuit boards. The etching mechanism is discussed by the calculations based on the solution of the one- dimentional heat equation. These calculations reveal that a low-damage hole is obtained by irradiation with the short pulse laser of nanoseconds and the dense temperature distribution to surface accompanied with a high absorption coefficient for short wavelength laser. It is derived that the temperature raised by a single irradiation with the threshold energy for ablation is approximately equal to the volatile temperature on each laser. Lt is roughly estimated that a low-damage hole is produced on polyimide, even if the repeated irradiation of 1000pps is given by 248nm or 266nm lasers.
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FUMIO KOKAI
1993 Volume 6 Issue 3 Pages
401-408
Published: 1993
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XeCl laser ablation of polyimide (PI) films in air and in a vacuum (1.3× 10
-4Pa) was studied in terms of etch depth and ablated surfaces. For the fluence conditions of 100-300mJ/cm
2, it was found that etch depths obtained in the vacuum were 20-30% greater than those obtained in air. X- ray photoelectron spectroscopy (XPS) showed that carbon-rich surfaces were produced after the irradiation of a single laser pulse in both air and vacuum. However, there were some differences in atomic ratios and bonding environments between the two ablated surfaces. The formation mechanism of these surfaces is discussed with emphasis on the influence of the ambient atmosphere. Furthermore, XPS results showed that more carbon-rich deposits were formed from laser ablation of PI. By mass spectrometry, carbon atoms with/without hydrogen atoms were detected as the main fragments of PI molecules. The chemical structures of deposits suggest the difference in the contribution of the fragments for the deposition process.
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Shigeru Yamaguchi, Kazuo Sekine, Mikio Mori, Yoichi Kenmochi
1993 Volume 6 Issue 3 Pages
409-414
Published: 1993
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Machining of Fiber Reinforced Plastics (FRPs) were demonstrated using an intense excimer laser radiation at wavelengths of and 193nm (ArF) and 308nm (XeCl). Dependence of cutting performance on various parameters such as laser wavelengths, energy fluence, and pulse repetition frequency were investigated. For both wavelength, the removal rate was measured to be approximately 2μm/pulse with a minimum thermal degradation of the materials. The ablation threshold was greater than 0.5J/cm
2 at 193nm. A considerably reduced threshold at 308nm was found for the materials taken up in this study. The cutting kerf processed by an excimer laser exhibits quite favorable for precisemachining.
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HIROYUKI NIINO, HIDEO KOMIZU, YASUJIRO KAWABATA, AKIRA YABE
1993 Volume 6 Issue 3 Pages
415-420
Published: 1993
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TETSURO MAJIMA, KYOKO SUGITA, AIKO NAKAO, SATOSHI MATSUNUMA, KATSUO AB ...
1993 Volume 6 Issue 3 Pages
421-428
Published: 1993
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Thin film of fluorinated polymer (perfluoropolyether) was synthesized directly on surface of several substrates by laser-induced chemical vapor deposition (CVD) technique. A hexafluoropropene-oxygen mixture was used as a starting material. The reaction proceeded through oxidative polymerization of the mixture induced by UV-irradiation using an ArF excimer laser at 193nm The mechanism of the oxidative polymerization of hexafluoropropene was discussed in terms of free radical initiators formed in the photoreaction.
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KENJIN HIGAKI, CHIAKI NAGAI, OSAMU MURATA, HAYAMI ITOH
1993 Volume 6 Issue 3 Pages
429-432
Published: 1993
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