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Plasma Polymerization (plasma + polymerization)

Distribution by Scientific Domains

Polymers and Materials Science	92%

Selected Abstracts

Reply to: "Testing the Hypothesis: Comments on Plasma Polymerization of Acrylic Acid Revisited"

PLASMA PROCESSES AND POLYMERS, Issue 5 2010
Dirk Hegemann
Abstract We reply to the discussions started by Rob Short and David Steele concerning the use of a macroscopic approach to examine the plasma polymerization of acrylic acid. Therefore, we analyze data of mass deposition rates versus the reaction parameter W/F using Arrhenius-type plots, which were recorded in different plasma reactors used by Short et al. and our group. [source]

Retraction: Controllable Fabricate Intrinsic Fluorescent Polymer Nanoparticles Array by Atmospheric Pressure Plasma Polymerization

PLASMA PROCESSES AND POLYMERS, Issue 2 2010
Ping Yang
This article has been retracted: Controllable Fabricate Intrinsic Fluorescent Polymer Nanoparticles Array by Atmospheric Pressure Plasma Polymerization (Plasma Process. Polym. 2009, DOI: 10.1002/ppap.200950007) [source]

Plasma Polymerization of HMDSO with an Atmospheric Pressure Plasma Jet for Corrosion Protection of Aluminum and Low-Adhesion Surfaces

PLASMA PROCESSES AND POLYMERS, Issue 10 2009
Uwe Lommatzsch
Abstract Thin functional films were deposited on aluminum with an atmospheric pressure plasma jet using hexamethyldisiloxane (HMDSO) as precursor. A high dynamic deposition rate on the order of 450,nm,·,m,·,min,1 was achieved. Composition and structure of the thin films show a strong dependence on the downstream location of the precursor injection. A 4,mm downstream shift of the precursor injection increases the carbon content in the thin film by a factor of 2.5, as indicated by XPS analysis and alters the degree of cross-linking according to the FTIR spectra. The coating with the low carbon content (17 at.-%) provides corrosion resistance for aluminum 2024 unclad exposed for 96,h to a neutral salt spray test. The coating with the high carbon content reduces the adhesion of an epoxy resin to the surface and may be used as a release coating. [source]

Effect of Substrate Temperature on the Plasma Polymerization of Poly(methyl methacrylate),

CHEMICAL VAPOR DEPOSITION, Issue 1 2006
B. Casserly
Abstract Low-power, plasma-enhanced (PE)CVD together with polymerization of methyl methacrylate (MMA) can be used to deposit thin films of poly(methyl methacrylate) (PMMA) with,minimal loss of functional groups, as shown by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and Raman spectrometry (RS). Retention of functional groups decreases with increased substrate temperature, corresponding to decreased deposition rates. From XPS data, the calculated percentage loss of functional groups ranges from 0.9,% to 43.4,%, changing as a function of deposition conditions. RS confirms the presence of C=C bonds in the polymer backbone as a result of scission of the ester group from MMA. The thermal properties of PECVD-produced films from MMA can be tailored by varying the substrate temperature. Onset of thermal decomposition increases with increased substrate temperature by eliminating thermally labile peroxide linkages in the polymer backbone, and by crosslinking that occurs at radical sites generated via scission of functional group bonds. The post-anneal thicknesses of the remaining polymer is of the order of 4,nm or less, indicating that low-power PECVD of PMMA is a viable candidate to act as a sacrificial material for air-gap fabrication. [source]

Plasma polymerization and deposition of glycidyl methacrylate on Si(100) surface for adhesion improvement with polyimide

POLYMERS FOR ADVANCED TECHNOLOGIES, Issue 10 2001
X. P. Zou
Abstract Thin polymer films were deposited on Si(100) surfaces by plasma polymerization of glycidyl methacrylate (GMA) under different glow discharge conditions. The FT-IR, X-ray photoelectron spectroscopy (XPS), and amine treatment results suggested that the epoxide functional groups of the deposited films had been preserved to various extents, depending on the plasma deposition conditions. The use of a low radio frequency power (, 5 W) and a relatively high system pressure (100,400 Pa) readily resulted in the deposition of thin films having nearly the same composition of the epoxide functional groups as that of the GMA homopolymer. The plasma-polymerized GMA (PP-GMA) thin films deposited on the Ar plasma-pretreated Si(100) surfaces were retained to a large extent after acetone extraction, suggesting the presence of covalent bonding between the PP-GMA layer and the Si surface. Thermal imidization of the poly(amic acid) precursor of polyimide on the GMA plasma-polymerized Si(100) surface resulted in a strongly adhered polyimide film. The adhesion results further suggested that the GMA polymer had been grafted on the Si(100) surface and the epoxide functional groups had undergone reactive interaction (curing) with the carboxylic and amine groups of the poly(amic acid) during thermal imidization. Copyright © 2001 John Wiley & Sons, Ltd. [source]

Reply to: "Testing the Hypothesis: Comments on Plasma Polymerization of Acrylic Acid Revisited"

Pulsed-Plasma Polymeric Allylamine Thin Films

PLASMA PROCESSES AND POLYMERS, Issue 8 2009
Zhilu Yang
Abstract High surface functional groups concentration, excellent dynamical stability and mechanical properties are ideal for biomedical plasma polymers. Herein, we report a simple and effective approach to fabricating such an ideal plasma polymeric allylamine film on 316L stainless steel (SS) by pulsed plasma polymerization. The experimental results show that the concentration of the primary amine groups (NH2/C) of the plasma polymeric allylamine film was 2.4,±,0.4%. The plasma polymeric allylamine film possesses not only high surface NH2 concentration, but also high cross-linking degree and close-knit network structure that could well resist hydrolysis, and dissolution in the aqueous solution. Furthermore, the plasma polymeric allylamine film was used as a stent coating that shows a good resistance to the deformation behaviour of compression and expansion of the stent. [source]

Surface Modification with Pressure Pulse Plasmas

PLASMA PROCESSES AND POLYMERS, Issue 6-7 2009
Andreas Holländer
Abstract In plasma treatments, the process gas is usually fed into the chamber in a more or less continuous way. The pulsing of the process gas can provide new opportunities. Some of them are explored in this paper. The interrupted or alternating process gas flux can help in mixing the sample in an activation treatment of a polyethylene powder. If the pores are not too small, a pressure pulse can help to improve the oxidation inside a porous polyolefin material. A plasma polymerization of ethene or allylamine can be more efficient if the timing of a plasma power pulse and the monomer pulse is optimized. Radicals are formed in the surface during the plasma pulse and these radicals initiate a polymerization of the monomer at a higher pressure. [source]

Deposition of Plasma-Polymerized 1-Cyanoisoquinoline Thin Films and Their Dielectric Properties

PLASMA PROCESSES AND POLYMERS, Issue 9 2007
Xiong-Yan Zhao
Abstract A novel plasma-polymerized 1-cyanoisoquinoline (PPCIQ) thin film of desired thickness was prepared by plasma polymerization under different glow discharge conditions. The effect of the discharge power on the chemical structure, surface composition and morphology of the PPCIQ thin films were investigated by Fourier Transform Infrared (FTIR) Spectroscopy, X-ray Photoelectron Spectroscopy (XPS), Atomic Force Microscopy (AFM) and deposition rate measurements. A high retention of the aromatic ring structure of the starting monomer in the deposited plasma films is obtained at a low discharge power of 15 W. The plasma-synthesized films are homogeneous and quite suitable for the measurement of dielectric properties. The dielectric measurements show that a low dielectric constant of 2.62 has been obtained for the PPCIQ thin films for the first time. [source]

Front Cover: Plasma Process.

PLASMA PROCESSES AND POLYMERS, Issue 7 2005
Polym.
Front Cover: The regime of plasma polymerization can be described by the evaluation of the mass deposition rates depending on the specific energy delivered to the active plasma zone. Thus, plasma reactors with well defined geometries support this macroscopic approach, which was found to hold also for gas mixtures of polymerizable and non-polymerizable gases. Further details can be found in the Full Paper by D. Hegemann,* and M.-M. Hossain on page 554. [source]

Plasma polymerization and deposition of glycidyl methacrylate on Si(100) surface for adhesion improvement with polyimide

Surface modification of quarry stone by hexamethyldisiloxane plasma treatment

APPLIED ORGANOMETALLIC CHEMISTRY, Issue 10 2007
Jose A. López-Barrera
Abstract The surface of quarry stone was modified by continuous plasma polymerization of hexamethyldisiloxane. The hydrophilic surface of the quarry stone was made hydrophobic and impermeable to water. Three different reaction times were analyzed. All of them resulted in the formation of a homogenous layer on the quarry stone surface. Contact angle and FT-IR analyses show that the hydrophobic character of the surface is due to methyl groups on the surface. The change in the contact angle with temperature and the wetting temperature (Tw) are also discussed. Copyright © 2007 John Wiley & Sons, Ltd. [source]

Ion-Exchange Plasma Membranes for Fuel Cells on a Micrometer Scale,

CHEMICAL VAPOR DEPOSITION, Issue 6-7 2007
S. Roualdès
Abstract Recent advances in,miniaturization technology make polymer electrolyte membrane fuel cells very attractive as power sources for portable devices. Ion-exchange membranes for microscale fuel cells are synthesized by plasma polymerization (using a precursor containing ion-exchange groups) and intensively characterized. Ion-exchange plasma membranes are thin, amorphous, and dense materials with no defects. Spectroscopic analyses reveal a polymer-type matrix containing a rather high concentration of ion-exchange groups. Under the best synthesis conditions, membranes show a satisfying ionic conduction level and a high compatibility with other active layers of fuel cells, making them suitable for insertion in such power-supply devices. [source]