2 edition of photostability of U. V. and electron beam cured multifunctional acrylate films. found in the catalog.
photostability of U. V. and electron beam cured multifunctional acrylate films.
Nicholas J. White
Written in English
|Contributions||Manchester Polytechnic. Department of Chemistry.|
Activated carbons (ACs) were modified via e-beam irradiation at various doses for use as an electrode material in electric double-layer capacitors (EDLCs). The chemical compositions of the AC surfaces were largely unchanged by the e-beam irradiation. The ACs treated with the e-beam at radiation doses of kGy exhibited higher nanocrystallinity than the untreated by: 5. Beta-Carboxyethyl Acrylate, 99% (CAS # ) High purity carboxylated monomers incr ease the hydr ophilicity in poly-mers and provide crosslinking sites for divalent ions (e.g. Zn++). Polysciences, Inc. offers both methacrylic acid in high purity (%) and a . Using electro-optical pump and probe measurements, we studied optical properties of a thin film of tris-(8-hydroxyquinoline) aluminum (Alq3) doped with DCM2 laser dye under pulsed injection current Cited by: This paper reports on the structural properties of poly(3-methylthiophene) P3MeT thin films prepared by vacuum evaporation on the glass substrates. The structural and surface morphology, wettability, adhesion, and intrinsic stress of these thin films were studied for three different thicknesses. The variation of the film thickness affects the structure, surface, and mechanical properties of Cited by: 4.
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The photo-oxidative stabilities of electron-beam cured multifunctional di- and triacrylate resin films have been studied by measuring the growth in hydroxyl absorption at cm −1 and decrease in that of alkyl hydrogens between – cm −1 using high resolution i.r. spectroscopy.
Photoyellowing of the amine terminated diacrylate resin was monitored by measuring the increase in Cited by: 3. Photo-oxidative stability of electron beam and UV cured acrylated epoxy and urethane acrylate resin films. Overall, by measuring the growth in hydroxyl absorption at cm-~, electron-beam cured resin films are more photostable than U V cured films, indicating the high photo-activity of residual photoinitiator in the latter case.
Cited by: Photoageing reactions and kinetics on long wavelength irradiation of an electron beam (EB) cured resin are presented. The material studied is an aliphatic polyurethane acrylate resin.
A mixture of acrylate monomers and oligomers must be identified that upon electron beam irradiation undergoes a free radical polymerization to give a binder polymer with the requisite mechanical properties.
The acrylate monomers will be mixtures of commercial monoacrylates, diacrylates and triacrylates. The properties and morphologies of UV‐cured epoxy acrylate (EB) blend films containing hyperbranched polyurethane acrylate (HUA)/hyperbranched polyester (HPE) were investigated.
A small amount of HUA added to EB improved both the tensile strength and elongation at break without damaging its storage modulus (E′). The highest tensile. The electron beam (EB) segment of the energy-curing adhesives market continues to expand and is supported by several factors.
The high curing efficiency inherent with EB provides low odor and extractables, as well as more complete laminate bonding, in food-packaging : Michael Gould. prepolymers and monomers into a solid cured films. •The energy of the UV radiation or the electron beam is used to induce free radical polymerization, and thus curing of the polymer films take place.
•Advantages: can be performed at room temperature, with a fast curing rate, No volatile chemicals. 4/28/ Sudan Atomic Energy Commission 3. Curing behavior of a UV-curable coating based on urethane acrylate oligomer: The influence of reactive monomers TGA res ults f or U V-cured films.
scanning electron microscope (SEM), gel. Other oligomeric compounds with multiple tertiary amine functional groups are also known and are used in low migration ink and coating formulations.2, 3 Although the use of amine synergists are well known in UV coating formulations they are not commonly used in electron beam (EB) curable coatings.
Acrylate based EB coatings cure without added. A series of novel methacrylate terminated polysiloxane hybrid oligomers and functional acrylate oligomers were synthesized and characterized by GPC, FT-IR and NMR. The functional polysiloxane oligomers were introduced into the acrylate UV-curing system to improve its Cited by: 6.
This paper presents the properties of electron beam cured SOG (spin-on-glass) films in terms of the chemical bond structure and accompanying device damages. It is observed that e-beam cured SOG films do not show the Si-CH bonds in the FT-IR spectra but still have the carbons in the film which are thermally stable.
As for the device damage, the experimental result shows that the threshold Cited by: 1. In this paper several formulations of UV-curable polyurethane acrylate resins were used to study the effect of reactive diluents on performance properties.
It was observed from the results that UV-cured polyurethane acrylate resin films on metal surfaces exhibit excellent gloss (60°), mechanical, and chemical- and stain-resistant : Devendra Agarwal. The invention detailed herein comprises a family of radiation-curable coating formulations specifically for wood substrates.
These coating formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with β-keto esters (e.g., acetoacetates), β-diketones (e.g., 2,4-pentanedione), β-keto amides (e.g., acetoacetanilide, acetoacetamide Cited by: The most important parameter for process and quality control of UV and electron beam (EB) curing processes is the conversion of the (meth) acrylic double bonds, since that determines all other functional properties of a coating such as scratch and abrasion resistance, hardness, weathering resistance, chemical stability, the content of extractables, etc.
The invention detailed herein comprises a family of radiation-curate a coating formulations specifically for wood substrates. These coating formulations are based on multifunctional acrylate resins formed by the reaction of acrylate monomers and oligomers with ß-keto esters (e.g., acetoacetates), ß-diketones (e.g., 2, 4-pentanedione), ß-keto amides (e.g., acetoacetanilide, acetoacetamide Cited by: This precursor was spin coated, dried and UV-cured to generate the hybrid films.
The silica con - tent in the hybrid thin films was varied from 0 to 30 wt%. Experimental results showed the aggregation of silica particles in the hybrid films.
Thus, the silica domain in the hybrid films was varied from 30 to 50 nm by the different ratios of MSMA. Most electron beam processors are self-shielded, meaning that the radiation is contained in the reaction chamber and integral shielding.
This is accomplished through the use of lead lining and having no line of sight into the processing area. Electron beam machines are designed to be fail-safe.
A review. Photo-curable resins based on multifunctional acrylate monomers are commonly applied as thin films (e.g.
protective coatings, printing inks, etc.) and in recent years are also used for the fabrication of bulk objects such as dental fillings and 3D-printed by: multifunctional monomers and telechelic polymers. The main advantage of using UV applications, namely thin films exposed to intense UV radiation in the presence of air In this review article, the progress recently made regarding the kinetics of ultrafast photo- final properties of UV-cured acrylate polymers depend primarly on the.
Water-based UV-curable prepolymers are novel environmentally friendly materials. The blending property of two kinds of the prepolymers, water-based UV-curable polyurethane acrylate (UVPU) and water-based UV-curable epoxy acrylate (WEA), was studied in this paper.
Blending compatibility, curing rate, optical and mechanical properties, and the cross-section morphology of the cured films of UVPU Author: Fu Qiang Chu. Our synthesis is based on acrylate-complexed metal compounds.
Based on this approach and the availability of commercial precursors, have successfully formed organic/inorganic hybrid films containing both lead and iron. We anticipate that our method will be possible with any metal compound that is available in an acrylate by: 5. Cytec Industries Inc.
launches "Ebecryl " aliphatic urethane acrylate for UV/EB cured films and plastics. What differentiates this new coating resin from others is the special combination ofmechanical properties.
The acrylate. Applications of Novel Photo-Curing Oligomer Resins: Generation Two. some of the recent developments in the application of these new resins to various substrates and the performance of cured films versus published benchmark systems.
and Hahn, L. "Radiation-Curable Inks and Coatings from Novel Multifunctional Acrylate Oligomers", American. Free Online Library: Investigation of the properties of UV-curing acrylate-terminated unsaturated polyester coatings by utilizing an experimental design methodology.
by "JCT Research"; Business Chemicals, plastics and rubber Acrylic acid Methods Adipic acid Book publishing Coatings Coatings industry Maleic anhydride Monomers Neopentyl glycol Polyethylene terephthalate Tracers.
A novel hyperbranched polyurethane acrylate (HBPUA), successfully synthesized based on a reaction of hyperbranched polyether (HBP-OH) with toluene diisocyanate (TDI) and hydroxy-ethyl acrylate (HEA), was incorporated into photosensitive polyurethane acrylate (PUA) as crosslinker to prepare a series of high-performance UV-curable coatings.
Initiated chemical vapor deposition of poly(1H,1H,2H,2H-perfluorodecyl acrylate) thin films. Gupta M(1), Gleason KK.
Author information: (1)Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, RoomCambridge, Massachusettsby: A.
Matev et al.: Preparing, properties and application of waterborne polyurethane-acrylate oligomer as a matrix films were characterized and confirmed for the formation of urethane linkage. Laminated products are prepared from layers of materials bonded together forming a unit body.
Laminated. added to the acrylate monomer (bisphenol-A ethoxylate diacylate) to initiate the photopolymerization. Micrometer-sized cylindrical samples are prepared via UV-curing in a nitrogen atmosphere, see Figure 1 (right).
An exposure time of s for a mixture of 3wt% of initiator is used. Figure 2: Relation between spin speed and thickness of resin Author: R Anastasio, van Lca Lambèrt Breemen, RM Ruth Cardinaels, Gwm Gerrit Peters.
Transmission electron microscopy of unstained hybrid of the specimen by the electron beam results in uncertainty in the analysis of the signals and in a loss of resolution. The supporting C films used in the present experiments were obtained from Ted Pella and had thicknesses of below 10 nm.
The coefficient of thermal expansion also exhibited dependence on film thickness, molecular weight, and substrate used. It was found that the T g of polymer thin films can be modeled using a “master” curve based on reduced variables, where T g is normalized by the its bulk value and film thickness is normalized by the polymer radius of Cited by: 3.
Controlling self-patterning of acrylate films by photopolymerisation. Thursday, 23 February Acrylate formulations can spontaneously generate surface patterns by UV-curing in open-air.
This phenomenon, designated as self-patterning, occurs if there is a balance at the film surface between oxygen inhibition and polymerisation rates. The authors prepared ultraviolet (UV)-cured resin films with glycerin 1,3-dimethacrylate (GDM), modified by the addition of reactive fluoroalkyl acrylates.
The authors then measured the decrease in the surface free energy of these materials to investigate their potential for successful demolding in UV nanoimprinting with unmodified silica by: 4.
2 September Polymers with customizable optical and rheological properties based on an epoxy acrylate an electron-rich organic dopant such as phenanthrene is added to a commercially available reactive polymer based resin.
Moreover, changes in viscosity can be achieved by using a comonomer with suitable properties like benzyl Cited by: 1. ADU (Advanced Electron Beams, Wilmington, USA) under nitrogen atmosphere at room tempera-ture. The electron energy of keV corresponds to a maximum penetration depth of about !m in polymeric materials.
To study the effect of electron beam cross-linking on the structure of the SRP, thin films of about 70 nm were applied by spin coating.
The diffusion of liquid isobornyl acrylate (iBoA) into photopolymerized films of urethane acrylate was shown to be strongly dependent on curing conditions. Fourier transform infrared (FTIR) monitoring of iBoA sorption into films photopolymerized in oxygen-free conditions reveals that diffusion proceeds according to Fick’s laws.
The diffusion coefficient and the total amount of absorbed Cited by: 7. Understanding the thermal properties of the polymer thin films is crucial for designing nanoscale coatings, where thermal properties are expected to differ from their corresponding bulk properties because of greater fractional free volume in thin films and residual stresses that remain from film by: 1.
Issue in Honor of Prof. Kessar ARKIVOC (vii) ISSN Page 76 ©ARKAT USA, Inc Solvent-free, catalyst-free Michael-type addition of amines to electron-deficient alkenes Brindaban C. Ranu,* Suvendu S. Dey, and Alakananda Hajra Department of Organic Chemistry, Indian Association for the Cultivation of Science, Jadavpur.
Electrospray process was developed for organic layer deposition onto polymer organic light-emitting diode [PLED] devices in this work. An electrospray can be used to produce nanometer-scale thin films by electric repulsion of microscale fine droplets.
PLED devices made by an electrospray process were compared with spin-coated ones. The PLED device fabricated by the electrospray Cited by: Acrylic acid is a moderately strong carboxylic acid primarily used as an intermediate in the production of acrylate esters.
These acrylate esters are then mainly used to manufacture adhesives, plastics additives, coatings, paints and textiles. Technology Description.
employed. The devices have been studied by the basic I-V characterisation. Chapter 5. Material analysis The fifth chapter is dedicated to the characterisation of five organic semiconductors deposited in thin film on glass.
The materials under study are two p-type semiconductors, copper phthalocyanine. A new series of radical-cationic UV dual curable polyurethane-modified epoxy monoacrylates (PMEMA) was prepared.
Radical-cationic UV dual curable were prepared with photosensitive resin (epoxy monoacrylates (EMA) or PMEMA), reactive diluents, radical and cationic photoinitiators. UV dual cured films of those liquid compositions were obtained by using a high pressure mercury UV by: 2.1 Electronic structure, structural and optical properties of thermally evaporated CdTe thin films a 1, anov2,3, ran2*, larasu1, moorthy and rgenov4 1R & D Department of physics, Kongunadu Arts and Science college, CoimbatoreTamilnadu, India.
2Department of Chemistry, University of Oslo, PO Box Blindern, N Oslo, Norway. The present invention is based on the discovery that certain electron poor olefins combined with nucleophiles and a base catalyst are LOW TEMPERATURE CURING ACRYLATE AND MALEIMIDE BASED FORMULATIONS AND METHODS FOR USE THEREOF An assembly comprising a first article permanently adhered to a second article by a cured aliquot of the.