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Topic: Plasma polymerization

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	Polymerization - Wikipedia, the free encyclopedia
		Polymerization is a process of reacting monomer molecules together in a chemical reaction to form three-dimensional networks or polymer chains
		Addition polymerization is involved in the manufacture of polymers such as polyethene, polypropylene and polyvinyl chloride (PVC).
		Polymerization dates back to the beginning of DNA based life, as both DNA and proteins can be considered polymers.
	en.wikipedia.org /wiki/Polymerization (1265 words)

	4th STATE - Assisted Coatings
		Plasma activation is the alteration of surface characteristics by the substitution of chemical groups or moieties for groups normally present on the polymer chain being modified.
		The choice of equipment used for plasma polymerization and deposition is thus dictated by both the rate of deposition desired, the film properties that can be obtained by the various systems and practical considerations such as the size of the parts to be treated and processing rates that are feasible in any given system.
		The pi-pi* intensity is identical in plasma polymerized styrene and conventional polystyrene indicating that the phenyl ring was deposited intact onto the wafer substrate.
	www.4thstate.com /publications/AssistedCoatings.htm (2461 words)

	OhioLINK ETD: JOHNSON, ERIC
		The use of plasma polymerization is a viable means of limiting chromophore diffusion in optical stacks to create devices employing non-homogeneous device concentrations with temporal stability.
		Plasma polymerization was investigated as a means of constructing organic anti-reflection (AR) coatings, organic quarter-wave (QW) stacks and organic rugate filters.
		The possible use of plasma polymerized benzene (PP-benzene) and plasma polymerized Octafluorocyclobutane (C4F8) (PP-OFCB) as organic AR coatings and organic QW stacks was evaluated.
	www.ohiolink.edu /etd/view.cgi?ucin1004706209 (452 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		A substrate 1 to be plasma polymerized is transported from the unwinding roll 11 in the transport chamber 10, and is introduced into the deposition chamber 20 via the differential opening 31 at one side.
		Plasma discharge has a tendency to be generated under a predetermined pressure atmosphere according to the type of the discharge.
		The substrate 1 to be polymerized is used as an anode by applying a DC power 40 to the unwinding roll 11, and the opposite electrode as a cathode in the deposition chamber is positioned to both surfaces of the substrate to be deposited.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/15210.010301&ELEMENT_SET=DECL (3481 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		The hydrophilic plasma polymerization according to the present invention is applicable to a mechanically machined tube, as well as a bare tube, of a condenser, an evaporator, and an absorber which are main components of an absorption chillers.
		A hydrophilic polymerized film is formed on a metal surface by means of plasma generated by a DC discharge or a RF discharge, and thereby the metal maintains a functional surface which is physically and chemically more stable compared to other surface modification methods.
		Plasma generated from a mixed gas of monomer and a nonpolymerizable gas forms a polymer layer with an excellent hydrophilic property on an object material.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/18462.010315&ELEMENT_SET=DECL (4859 words)

	Article having a composite insulative coating - Patent 5137780
		The second polymeric coating layer is substantially resilient and strongly bonded to the primer coating, and the second layer comprises a intermediate to high concentration of surface and bulk free radicals.
		The polymeric coating is substantially resilient and strongly bonded to the activated substrate surface and comprises an intermediate to high concentration of surface and bulk free radicals.
		In operation of the apparatus, the polymerization chamber 9 is evacuated, monomer (which may contain a diluent gas) from source 21 is admitted into the chamber via line 23, and power is applied to RF coil 17 to establish a glow discharge zone within the chamber in the vicinity of holder 11.
	www.freepatentsonline.com /5137780.html (8783 words)

	Program for Plasma Polymerization/Deposition Symposium
		Plasma polymerization on metal using DC glow discharge was carried out for the hydrophilic surface formation using hydrocarbon reactive monomer in various deposition time, voltage, current, and pressure.
		Plasma polymerisation is the relevant process in the "plasma on" period whereas a recombination polymerization of fragmented monomer molecule radicals occurs when the plasma is switched off.
		Plasma copolymerisation of a "functionalised" monomer with a hydrocarbon "diluent" comonomer may be used to fabricate surfaces of controlled surface chemistry.
	www.mstconf.com /plasabs.htm (4931 words)

	Background
		Plasma polymerization process is usually carried out in one of the two types of reactors: Bell-jar type reactor with internal parallel plate metal electrodes and b) Tubular-type reactor with external ring electrodes or an external coil for the r.f.
		The deposition rate of a plasma polymer is determined by the following parameters: the geometry of the system, the reactivity of the starting monomer, its flow rate, the working gas pressure, the power, and frequency of the excitation, signal, and finally, by the temperature of the substrate.
		However, better understanding of the plasma polymerization process especially how deposition (mainly plasma) parameters influence the resulting properties of plasma polymers and their time and temperature stability (aging) is needed.
	kmf.troja.mff.cuni.cz /COST/backgr.htm (1503 words)

	Gas Plasma (Site not responding. Last check: 2007-10-12)
		Plasma polymerization creates new and unusual polymer properties that have only begun to be explored in biomedical applications.
		Plasma is an increasingly appreciated alternative to other processes, since it is capable to modify the outermost layer (sometimes as thin as few Angstroms) of the substrate material, and even to grow on the surfaces totally new materials with customized characteristics, without sacrificing the desirable properties of the bulk material.
		Plasma has been used to enhance or decrease the wetting (typically measured by a decrease or an increase of the contact angle of various liquids including water) on a large variety of substrates.
	www.vitekres.com /gas_plasma_for_surface_modification.htm (1479 words)

	Plasma processing: Facts and details from Encyclopedia Topic (Site not responding. Last check: 2007-10-12)
		Plasma processing is a plasma[For more facts and a topic of this subject, click this link]-based material processing technology that aims at modifying the chemical and physical properties of a surface.
		Plasma polymerization uses plasma sources to generate a gas discharge that provides energy to activate or fragment gaseous or liquid monomer, often containing...
		Plasma polymerization uses plasma sources to generate a gas discharge that provides energy to activate or fragment gaseous or liquid monomer, EHandler: no quick summary.
	www.absoluteastronomy.com /encyclopedia/p/pl/plasma_processing.htm (439 words)

	Plasma Surface Modification and Plasma Polymerization
		Plasma treatment and polymerization are important technologies which can be custom engineered for this purpose.
		One of the first and most comprehensive books to cover plasma treatment and polymerization for the purpose of surface modification, it presents a detailed discussion of recent developments in the field, including plasma/polymer interactions and the formation of polymer surface and thin polymeric films.
		It concentrates on plasma properties and the interactions between the plasma and the substrate.
	www.polysurfacesbookstore.com /pages/3034.html (257 words)

	Polímeros - Polymer Production by Plasma Polymerization of Oxygenated Organic Compounds (Site not responding. Last check: 2007-10-12)
		Plasma polymerization was obtained with pressures in the reactor ranging from 0.5 to 2.0 Torr to ensure good plasma conditions, i.e.
		In order to learn whether the lack of polymerization was due to the low amount of species, the auxiliary inlet gas system was used and ethanol was admitted in the plasma reactor using both the conventional admittance and the auxiliary inlet-gas system.
		Plasmas of 2-propanol were easily obtained, showing a high polymerization rate (ranging from 100 to 400 Å/min) and a reproducible process.
	www.scielo.br /scielo.php?script=sci_arttext&pid=S0104-14282002000400011 (2007 words)

	Plasma processing - Wikipedia, the free encyclopedia
		Plasma processing is a plasma-based material processing technology that aims at modifying the chemical and physical properties of a surface.
		Related topics are plasma chemistry, chemical vapor deposition, and physical vapor deposition processes like sputtering, plasma ion doping, and reactive ion etching.
		This page was last modified 13:53, 22 February 2006.
	en.wikipedia.org /wiki/Plasma_processing (78 words)

	On-Site Programs
		In reactive plasmas, emphasis will be on competing deposition and etching processes at the various plasma/surface interfaces (target, substrate, walls, fixtures) and their dependence on the flux and energy of various incident specie.
		The role of plasma polymerization of fluorocarbons versus reactive ion etching, (RIE), in controlling the geometry of micro-features in semiconductor processing will be outlined as well as selective etching concepts.
		Plasma approaches leading to the dispersion of inorganics (metals, oxides and composites) in polymer coatings during film growth will be described in some detail.
	www.svc.org /EP/Syllabus/EP_CourseSyllabus_C209.html (466 words)

	Apparatus for producing a microwave plasma for the treatment of substrates, in particular for the plasma-polymerization ...
		The invention relates to apparatus for producing a microwave plasma for the treatment of substrates, and in particular for the plasma polymerization of monomers for coating substrates.
		The invention concerns apparatus for producing a plasma with microwaves for the treatment of substrates and, more particularly, for the plasma-polymerization of monomers for coating the substrates with the polymer that is formed therefrom.
		The plasma is formed within the reaction chamber 1 in which, in addition to an ionizable gas, such as argon, there is also provided a monomeric component which can be polymerized under the action of the plasma.
	www.freepatentsonline.com /4521717.html (4154 words)

	[No title] (Site not responding. Last check: 2007-10-12)
		The structure of plasma polymers are studied by Fourier Transform Infrared Analysis and X-ray Photoelectron spectroscopy.
		The investigation shows that the higher glow discharge current density, gas phase pressure during plasma polymerization, and film thickness result in higher polymer sensitivity to humidity.
		The investigations on plasma polymers, obtained from HMDSO, show that such polymers are very promising as sensitive elements for sensing the humidity and ammonia vapour of ambient air and therefore for the development of the quartz resonator sensors.
	www.ill.fr /Events/SEMINAR/Archives/COLIII17Sep2002.html (522 words)

	The Role of Ions in the Plasma Polymerization of Allylamine
		The radio-frequency-induced plasma polymerization of allylamine has been investigated in the plasma-gas phase by mass spectrometry and at the plasma-solid interface by means of an ion flux probe and a quartz mass balance.
		The results are compared with those obtained in an earlier investigation of the plasma polymerization of acrylic acid.
		These oligomerization reactions were found to be relatively power-insensitive compared with those seen in plasmas of acrylic acid, as was the gas-phase concentration of the intact neutral monomer.
	pubs.acs.org /cgi-bin/abstract.cgi/jpcbfk/2001/105/i24/abs/jp0043468.html (333 words)

	Gas Plasma (Site not responding. Last check: 2007-10-12)
		Special gases under plasma conditions will create free radicals on the surface that subsequently can be reacted with other monomers, yielding surfaces with specialized properties.
		Certain gases in a plasma may undergo polymerization, usually via a free radical initiation process, and deposited on substrates.
		Plasma polymerization creates new and unusual polymers with properties that can be customized to special requirements.
	www.vitekres.com /gas_plasma.htm (149 words)

	Ring Retention via Pulsed Plasma Polymerization of Heterocyclic Aromatic Compounds
		Polymerization of two isomeric heterocyclic monomers, 3-methyl-1-vinylpyrazole and 1-allylimidazole, was investigated under pulsed plasma conditions.
		In particular, unusually linear polymers (by normal plasma polymerization standards) are achieved at exceptionally low average power inputs, employed when the pulsed plasma technique is operated at low duty cycles.
		Accordingly, this approach is useful in extending the utility of plasma polymerizations which have heretofore tended to focus on synthesis of unique, relatively highly cross-linked materials.
	pubs.acs.org /cgi-bin/abstract.cgi/cmatex/1998/10/i05/abs/cm970779k.html (301 words)

	OhioLINK ETD: FIELDING, JENNIFER
		Plasma polymerized fluorocarbon (PPFC) films were deposited onto various silicone rubber substrates, including O-rings, to decrease oil uptake.
		Depositions were performed using a radio frequency (rf)-powered plasma reactor and various fluorocarbon monomers, such as C2F6, C2F5H, C3F6, and 1H,1H,2H-perfluoro-1-dodecene.
		However, when a plasma polymerized hydrocarbon interlayer was deposited on the silicone rubber prior to the fluorocarbon films, adhesion was excellent.
	rave.ohiolink.edu /etdc/view?acc_num=ucin1085442499 (212 words)

	School of Physics Colloquium (Site not responding. Last check: 2007-10-12)
		Plasma polymerization or plasma enhanced chemical vapor deposition (PECVD) of organic compounds was first studied in detail in the 1950s.
		In 1960s rapid growth of the plasma polymerization field was stimulated by the development of microelectronics with the hope of using plasma polymers as dielectric films in devices.
		First, basic deposition reactors used for plasma polymerization processes are discussed and the accepted models of plasma polymerization are presented.
	www.physics.usyd.edu.au /coll/2006biederman.html (200 words)

	Richard B. Timmons
		In particular, we have been able to demonstrate exceptional film chemistry control during plasma polymerization of a wide range of monomers.
		Emphasis is placed on controlling both the nature and surface density of specific functional groups introduced during the plasma treatment process.
		"Pulsed Plasma Polymerization of 1-Vinyl-2-Pyrrolidone: Synthesis of a Linear Polymer," L. Han and R. Timmons, J.
	www.uta.edu /chemistry/html/richard_b._timmons.html (854 words)

	Radical (chemistry) - Wikipedia, the free encyclopedia
		Radicals play an important role in combustion, atmospheric chemistry, polymerization, plasma chemistry, biochemistry, and many other chemical processes, including human physiology.
		In addition to combustion, many polymerization reactions involve free radicals.
		As a result many plastics, enamels, and other polymers are formed through radical polymerization.
	en.wikipedia.org /wiki/Free_radical (2019 words)

	Plasma polymerization - The Encyclopedia (Site not responding. Last check: 2007-10-12)
		Polymers obtained from plasma polymerization differ from that of conventional 'wet-chemistry' techniques.
		This technique is useful in applications such as biomedical whereby controlling and modifying surface become important.
		Several advantages of plasma polymerized films include: 1.
	www.the-encyclopedia.com /description/Plasma_polymerization (181 words)

	HUETTINGER Electronic \| DC, MF and RF Generators for Plasma Excitation and Induction Heating
		Plasma polymerization is a vacuum coating process in which gas monomers are activated to a plasma.
		Plasma is activated in a plasma chamber by applying electro-magnetic energy under a processing pressure of less than one millibar.
		Plasma polymerization allows to produce film with scratch-resistant, non-stick or dirt-repellent coatings.
	www.trumpf.com /scripts/huettinger/he_anwendung.php?lang=en&id=10&ianwendungid=16&artid= (141 words)

	Synthesis of Dry Electron Beam Resist by Plasma Polymerization (Site not responding. Last check: 2007-10-12)
		Work is done on synthesis and characterization of plasma polymerized electron beam resists.
		Plasma Polymerization is a dry and clean process, which gives pin-hole free resist whose characteristics can be tailored easily.
		Plasma Polymerized MMA resist synthesized in the laboratory is found to be self developable and has very high sensitivity compared to the conventional ones.
	electronics.unipune.ernet.in /Pages/Plasma.htm (129 words)

	deposition of carbon materials (Site not responding. Last check: 2007-10-12)
		In the field of plasma diagnostics efforts were focused on the determination of rotational and vibrational temperatures in carbon containing plasmas.
		RF plasma treatments of the active surface of asymmetric polysulfone membranes in air and air-monomer mixtures have been performed in a capacitively coupled planar discharge.
		Afterward, a new top layer is rebuild by a mechanism combining plasma polymerization of external monomer and surface plasma polymerization in the depth of the material generated by the species diffusing from the plasma-surface interface.
	alpha2.infim.ro /~ltpd/carbon/carbon.htm (917 words)

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