Relevant bibliographies by topics / UV-polymerization

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'UV-polymerization'

Author: Grafiati
Published: 4 June 2021
Last updated: 29 March 2025

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Journal articles on the topic "UV-polymerization"

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Malik, Muhammad Salman, Sandra Schlögl, Markus Wolfahrt, and Marco Sangermano. "Review on UV-Induced Cationic Frontal Polymerization of Epoxy Monomers." Polymers 12, no. 9 (September 20, 2020): 2146. http://dx.doi.org/10.3390/polym12092146.

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Ultraviolet (UV)-induced cationic frontal polymerization has emerged as a novel technique that allows rapid curing of various epoxy monomers upon UV irradiation within a few seconds. In the presence of a diaryliodonium salt photoinitiator together with a thermal radical initiator, the cationic ring opening polymerization of an epoxide monomer is auto-accelerated in the form of a self-propagating front upon UV irradiation. This hot propagating front generates the required enthalpy to sustain curing reaction throughout the resin formulation without further need for UV irradiation. This unique reaction pathway makes the cationic frontal polymerization a promising route towards the efficient curing of epoxy-based thermosetting resins and related composite structures. This review represents a comprehensive overview of the mechanism and progress of UV-induced cationic frontal polymerization of epoxy monomers that have been reported so far in literature. At the same time, this review covers important aspects on the frontal polymerization of various epoxide monomers involving the chemistry of the initiators, the effect of appropriate sensitizers, diluents and fillers.
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Chen, Ko Shao, Su Chen Chen, Yi Chun Yeh, Hong Ru Lin, Wen Fu Lee, and Heng Hsien Lee. "Comparison with Physics and Chemical Property of SBS/AA Copolymer Using Thermal Polymerization and UV Graft-Polymerization Methods." Materials Science Forum 539-543 (March 2007): 1288–93. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.1288.

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This study was compare of physics and chemical property of Styrene-butadiene-styrene (SBS)/ Acrylic acid (AA) copolymer after thermal polymerization and UV graft-polymerization. The result of this study shows: when the thermal polymerization was used, the grafting percentage of SBS-g-AA rose along with the increase of the AA monomer concentration. The maximum occurred when SBS=0.5g and AA=2.5 x 0.0065mol, then it decreased along with the increase of the AA concentration. The transition ratio and grafting percentage decreased as the concentration of SBS increased; while AA was fixed on 0.0065mol, the maximum grafting percentage occurred by using 1g SBS. The grafting percentage increase along with the increase of reacting time, and it reached the maximum after reacting 3 hours. The water contact angle was lowered from 82o to 58o. Using the UV graft-polymerization, when AA monomer concentration increased, the grafting percentage increased as well; the maximum occurred when AA concentration was 2.88M. Moreover, the grafting percentage was increasing along with the increase of reacting time, but it stopped increasing around 40 minutes reacting time. The grafting percentage of thermal polymerization was higher than UV graft-polymerization. It shows that the swelling ratio of membranes grafted using the UV light was higher than those grafted by thermal polymerization.
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Thangawng, Abel L., Peter B. Howell, Jr, Christopher M. Spillmann, Jawad Naciri, and Frances S. Ligler. "UV polymerization of hydrodynamically shaped fibers." Lab on a Chip 11, no. 6 (2011): 1157. http://dx.doi.org/10.1039/c0lc00392a.

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Sheth, Saahil, Era Jain, Amin Karadaghy, Sana Syed, Hunter Stevenson, and Silviya P. Zustiak. "UV Dose Governs UV-Polymerized Polyacrylamide Hydrogel Modulus." International Journal of Polymer Science 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5147482.

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Polyacrylamide (PAA) hydrogels have become a widely used tool whose easily tunable mechanical properties, biocompatibility, thermostability, and chemical inertness make them invaluable in many biological applications, such as cell mechanosensitivity studies. Currently, preparation of PAA gels involves mixtures of acrylamide, bisacrylamide, a source of free radicals, and a chemical stabilizer. This method, while generally well accepted, has its drawbacks: long polymerization times, unstable and toxic reagents, and tedious preparation. Alternatively, PAA gels could be made by free radical polymerization (FRP) using ultraviolet (UV) photopolymerization, a method which is quicker, less tedious, and less toxic. Here, we describe a simple strategy based on total UV energy for determining the optimal UV crosslinking conditions that lead to optimal hydrogel modulus.
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Świderska, Jolanta, Zbigniew Czech, Waldemar Świderski, and Agnieszka Kowalczyk. "Reducing of on Polymerization Shrinkage by Application of UV Curable Dental Restorative Composites." Polish Journal of Chemical Technology 16, no. 3 (September 1, 2014): 51–55. http://dx.doi.org/10.2478/pjct-2014-0050.

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Abstract This manuscript describes dental compositions contain in-organic fillers, multifunctional methacrylates and photoinitiators. The main problem by application and UV curing process is the shrinkage of photoreactive dental materials during and after UV curing process. Total shrinkage of UV curable dental composites is a phenomenon of polymerization shrinkage, typical behavior for multifunctional methacrylates during polymerization process. The important factors by curing of dental composites are: kind and concentration of used methacrylates, their functionality, double bond concentration, kind and concentration of added photoinitiator and UV dose. They are investigated UV-curable dental compositions based on 2,2-bis-[4-(2-hydroxy-3-methacryxloyloxypropyl)phenyl]propane (Bis-GMA) and containing such multifunctional monomers as 1,3-butanediol dimethacrylate (1,3-BDDMA), diethylene glycol dimethacrylate (DEGDMA), tetraethylene glycol dimethacrylate (T3EGDMA), trimethylolpropane trimethacrylate (TMPTMA), polyethylene glycol 200 dimethacrylate (PEG200DA). Reduction of polymerization shrinkage of dental compositions is at the moment a major problem by dental technology.
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Yu, Huan Yang. "Synthesis of Crosslinker Containing Sulfone Group and its Crosslinking with Styrene." Advanced Materials Research 1048 (October 2014): 456–59. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.456.

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A new crosslinker containing sulfone group was synthesized by polymerization of 4,4’-dihydroxydiphenyl-sulphone and methacryloyl chloride. Using this kind of crosslinker, the crosslinked polystyrene beads were prepared by suspension polymerization and UV-light polymerization, respectively. The synthesized crosslinker and crosslinked polystyrene beads were characterized by nuclear magnetic resonance spectra and fourier transform infrared spectroscopy. The effect of crosslinker amount on sulfonation rate of beads was studied. Polystyrene beads made by suspension polymerization possess higher sulfonation rate when the crosslinker amount is lower than 6%. When the content of crosslinker is higher than 6%, the reaction still can be carried out by UV-light polymerization, but the coagulation occurred during suspension polymerization because of the extremely high polarity of crosslinker.
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Du, Xin, Linxian Li, Junsheng Li, Chengwu Yang, Nataliya Frenkel, Alexander Welle, Stefan Heissler, Alexei Nefedov, Michael Grunze, and Pavel A. Levkin. "UV-Triggered Dopamine Polymerization: Control of Polymerization, Surface Coating, and Photopatterning." Advanced Materials 26, no. 47 (November 10, 2014): 8029–33. http://dx.doi.org/10.1002/adma.201403709.

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Luo, Bingqing, Zengju Fan, Ziping Li, Yulong Chen, Yanqing Tian, and Xing Cheng. "Volume-expansion polymerization for UV-curable nanoimprinting." Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena 35, no. 1 (January 2017): 011604. http://dx.doi.org/10.1116/1.4973301.

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Pelgrims, J. "Cationic UV polymerization of Cyracure cycloaliphatic epoxies." Pigment & Resin Technology 16, no. 9 (September 1987): 4–8. http://dx.doi.org/10.1108/eb042394.

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Crivello, James V. "UV and electron beam-induced cationic polymerization." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 151, no. 1-4 (May 1999): 8–21. http://dx.doi.org/10.1016/s0168-583x(99)00109-3.

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Dissertations / Theses on the topic "UV-polymerization"

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Torfgård, Olof. "Short wavelength UV–LED photoinitiated radical polymerization of acrylate–based coating systems—A comparison with conventional UV curing." Thesis, Uppsala universitet, Strukturkemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-442431.

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The present work was performed at Sherwin–Williams Sweden group AB with the objective of comparing short-wavelength light emitting diodes (UVB/UVC) with the conventional mercury arc lamp as a curing method of acrylate-based, UV-paint undergoing free-radical polymerization when exposed to UV-radiation. Due to environmental and health risks, mercury-doped radiation sources will be phased out in the near future, according to the United Nations Minamata convention, hence new alternatives are needed. Light-emitting diodes differ from the mercury arc lamp as they provide semi-discrete output intensity lines within the UV spectrum instead of a broad output distribution with several main intensity lines. The power output is also considerably lower compared to the conventional method which limits the irradiance and dose that are key parameters in activating and propagating free-radical polymerization of UV-paint. Seven different light-emitting diodes between 260–320 nm was examinedand compared to the conventional mercury arc lamp. Cured coatings were evaluated by measuring the relative extent of acrylate conversion with ATR-FTIR and micro-hardness indentation test. Both methods correlate to the relative cross-linking density and qualitatively describe the curing process for each radiant source at a specific irradiance and dose. Three different paint formulations with widely different properties were used in the experiments. All three paints were able to cure with one or several light emitting diodes at comparable doses and 10 to 20 times lower irradiance to the conventional mercury arc lamp, resulting in similar acrylate conversion and hardness.
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Uchida, Emiko. "SURFACE MODIFICATION OF POLY(ETHYLENE TEREPHTHALATE) FILM BY UV-INDUCED GRAFT POLYMERIZATION." Kyoto University, 1993. http://hdl.handle.net/2433/74646.

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Barrow, Michael. "Functional aligned porous materials via directional freezing and frozen UV initiated polymerization." Thesis, University of Liverpool, 2013. http://livrepository.liverpool.ac.uk/13773/.

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The work in this thesis is split into three experimental chapters: The first section involves the development of the directional freezing and frozen polymerization method to prepare crosslinked aligned porous polymers with improved mechanical stability. Monomer solutions were directionally frozen in liquid nitrogen to orientate the growth of solvent crystals and the frozen samples are polymerized by UV irradiation. The solvent is removed under vacuum at room temperature to produce aligned porous structure. The mechanical stability is improved by two orders of magnitude compared to the usually freeze-dried porous materials. The materials are modified with graphene and a conducting polymer to make conducting monoliths, whilst maintaining the aligned porous structure. The aligned porous monolith is also assessed by high performance liquid chromatography (HPLC), showing fast separation of hydrocarbon compounds with low back-pressure. The second section uses directional freezing and frozen UV initiated polymerization to prepare aligned porous stimuli-responsive hydrogels. Oligo-ethylene glycol methacrylates and dimethylamino ethyl methacrylate monomers were used to produce temperature and pH-responsive hydrogels respectively. Aligned porous morphologies are observed in both dry and hydrated states. The hydrogels exhibit stimuli-responsive behaviour in aqueous conditions and anisotropic compressive strength and diffusion behaviour with respect to freezing direction. Section three uses directional freezing and frozen UV polymerization method to prepare aligned porous monoliths containing silica. The surface of the materials was post-functionalized to make two different types of aligned porous composites. Hydrothermal synthesis using Teflon lined autoclaves was used to functionalize monoliths separately with silver and metal organic frameworks (MOFs). The MOF composite materials were used as a stationary phase to try and separate a mixture of organic compounds.
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BAZZANO, MARCO. "Development of UV-based polymerization techniques for the production of drug delivery devices." Doctoral thesis, Politecnico di Torino, 2018. http://hdl.handle.net/11583/2705288.

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Production of particles with dimension in the submicron scale underwent a significant increase in the last decades. The idea to exploit these devices to actively target a wide range of applications drove many important efforts in the development of such particles. In particular, the possibility to encapsulate and release active ingredients with desired rates, as well as to specifically target certain areas of the human body, is of huge importance in therapeutic treatments. Among the broad spectrum of micro and submicron particles, polymeric particles represent an extremely versatile class of devices. Their high biocompatibility and possibility to swell or degrade to enhance release once in contact with body fluid are particularly interesting in drug administration. This work was focused on the development of new techniques to produce structured polymeric particles in the micro and nano regions. Two rather different polymerization techniques were investigated and modified in order to pursue this goal: miniemulsion and aerosol polymerization. In both cases, polymerization triggering was achieved by UV light in presence of photo-initiator compounds and two reaction mechanisms were investigated: radical and cationic. Miniemulsion polymerization was studied as a case study of a well-known technique for production of polymeric particles. One major modification was applied to the standard experimental setup: polymerization was confined at the interface between dispersed and continuous phase, thus producing capsules with a polymeric shell and a liquid core. The product was characterized and the impact of process conditions on size and morphology of capsules was evaluated. In particular, ultrasound exposure time was used to design capsules size. After optimization of process parameters, an active ingredient was encapsulated. Its controlled release was evaluated in case of different polymeric shells. Differences were observed using different degrees of crosslinking in the polymeric material, thus showing the possibility to design release rate by varying the ratio between monomer and crosslinker. Aerosol polymerization was studied as a rather new technique for production of polymeric particles. It is a continuous process that does not require a liquid medium nor, usually, surfactants. For these reasons, it does not imply a cumbersome downstream work of purification. One major drawback of this technique is the challenging particles structuring process. In our work, phase separation was induced within aerosol droplets to obtain structured particles. Mixtures of ―good‖ and ―bad‖ solvents were used to carefully design solubility of the monomer and its oligomers in the sprayed solution. Thus, it was possible to obtain different porous particles morphologies simply by varying the ratio between the two solvents. Capsules structures were obtained using different approaches in cationic and radical mechanism. Chain transfer mechanism was applied in cationic polymerization by adding an alcohol in the sprayed solution, while the addition of a soft-maker was crucial for the production of polymeric shells in radical polymerization. In both cases, the goal was to delay gelation of the polymeric structure, thus providing more time for the structuring process. Once the particles morphology was designed, an active ingredient was encapsulated within different types of particles and its release was monitored. Molecular dynamic simulations were carried out to study the mechanisms that control the structuring process in aerosol cationic polymerization. Diffusion of the oligomer in the solvent mixture, as well as its interactions with the solvents, were calculated and the results confirmed the strong impact of solvent composition on the macromolecules transport parameters and, therefore, on their morphology.
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Lee, Jihean Palmese Giuseppe R. "Cationic polymerization of glycidyl ethers and furans : improved electron beam and UV cured epoxy networks /." Philadelphia, Pa. : Drexel University, 2007. http://hdl.handle.net/1860/2538.

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Song, Wentao Chemical Sciences &amp Engineering Faculty of Engineering UNSW. "UV initiated reversible addition fragmentation chain transfer polymerization of N-isopropylacrylamide and acrylic acid in aqueous solution at ambient temperature." Awarded by:University of New South Wales. Chemical Sciences & Engineering, 2008. http://handle.unsw.edu.au/1959.4/39170.

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It was demonstrated for the first time that RAFT polymerizations of NIPAAm can be carried out directly in water at room temperature without photo initiator under UV radiation. Under these conditions, the controlled/living features could be proven for a large range of monomer/RAFT agent ratios. Moreover, even at a monomer conversion exceeding 80%, polymerization control (PDI<1.2) is maintained. It is also demonstrated that the RAFT polymerization of AA can be carried out without photo initiator in water at ambient temperature in the presence of TRITT at short wavelength. At these wavelengths, the controlled/ living characteristics is maintained even at a monomer to polymer conversions exceeding 80%. UV/Vis spectrometry was employed to monitor the functional group (-S(C=S)S-) changes of the employed trithiocarbonate RAFT agent S,S???-Bis(??,?????-dimethyl-acetic acid)-trithiocarbonate (TRITT) in aqueous solution when exposed to UV radiation. It is shown that the degradation pattern of TRITT alone as well as TRITT in the presence of NIPAAm deviate from each other. Surprisingly, it is found that TRITT completely decomposed at 254 nm while the addition of monomer prevented the decomposition of TRITT at the same wavelength. Nuclear magnetic resonance (NMR) techniques were applied to study the decomposition products of TRITT in solution without the addition of monomer. Methanol-d4 was selected as the solvent. In addition, high-resolution soft ionization mass spectrometry techniques were used to map the product species generated during UV radiation induced RAFT polymerizations of NIPAAm and AA in aqueous media, allowing for the tentative assignment of end groups. The NMR analysis suggests that the decomposition of TRITT in methanol-d4 under UV radiation has three cleavage patterns. These three cleavage patterns (described in the current thesis in detail) all occur at the ???S(C=S)S- group, which is the weakest structural unit in TRITT molecule. iii However, polymerization occurs prior to decomposition, if monomer is present. The mass spectrometric analysis suggests that the initial radicals result from the dissociation of TRITT, as well as monomer. Trithiocarbonate end group degradation leading to the formation of thiol terminated chains is also occurring. In the case of NIPAAm polymerization, a peak which may be associated with a cross termination product of the intermediate radical was observed under both 302 nm and 254 nm wavelength irradiation. Interestingly, this peak does not occur in AA polymerization at any wavelength (nor is it expected to form under conventional RAFT conditions and was not observed in previous mass spectrometry studies in thermal or ??-initiated polymerizations of NIPPAm with TRITT) and thus this assignment should be treated as very tentative only.
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Du, Xin [Verfasser], and Michael [Akademischer Betreuer] Grunze. "Surface functionalization and surface patterning based on UV-induced dopamine polymerization and disulfide exchange strategies / Xin Du ; Betreuer: Michael Grunze." Heidelberg : Universitätsbibliothek Heidelberg, 2015. http://d-nb.info/1180499549/34.

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Henkel, Rouven Christoph. "Der Einfluss der UV-initiierten RAFT-Polymerisation auf die Strukturen und Eigenschaften von Polymernetzwerken." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-98E2-6.

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Mievis, Isabelle. "Synthèse, caractérisation et photoréactivité d'oligomères hyperbranchés." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210845.

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Depuis une dizaine d'années, les polymères hyperbranchés sont apparus dans la littérature. Ils possèdent un grand nombre de branchements ainsi qu'un grand nombre de groupes terminaux. La structure globulaire des polymères hyperbranchés les empêche de former des enchevêtrements. Il en résulte un avantage décisif pour leur application sous forme de revêtement de surface: les polymères hyperbranchés ont une viscosité plus faible à l'état fondu que les polymères linéaires. Cela permet aisément de les étaler sous forme de films minces sans utiliser de solvant. De plus, les polymères hyperbranchés possèdent un grand nombre de groupes terminaux qui peuvent être fonctionnalisés avec des monomères photoréticulables.

Le but du travail de thèse est d'obtenir de nouveaux revêtements de surface, à partir de polymères hyperbranchés ou de polymères fortement branchés, qui trouveront leur application dans l'industrie chimique.

La thèse s'articule autour de trois chapitres de synthèse suivis d'un chapitre traitant de la photoréactivité des oligomères linéaires, fortement branchés, et hyperbranchés.

La première approche de synthèse envisagée est la copolymérisation alternante radicalaire. Divers maléimides ont été engagés dans des copolymérisations radicalaires avec des allyléthers sans succès.

Lorsque ces derniers sont remplacés par des vinyls éthers, une copolymérisation alternante est observée. Néanmoins, une importante irreproductibilité est constatée, certains batchs donnant lieu à une gélification.

La seconde voie de synthèse étudiée est l'approche classique de polycondensation de monomères de type AB2 .Le monomère AB2 est obtenu par addition de Michael de la diéthanolamine sur l'acrylate de méthyle. La polycondensation est concomitante avec l'acrylation des fonctions alcools. La compétition entre ces deux réactions limite les masses molaires accessibles bien que les réactions de transestérification soient catalysées par des dérivés du Zr et que la stoechiométrie ait été variée.

La troisième voie de synthèse se base aussi sur la réaction de Michael. Des oligomères fortement branchés sont obtenus à partir de 1,6-hexanedioldiacrylate et d'éthylènediamine. Leurs analogues linéaires sont synthétisés en remplaçant l'éthylènediamine par la propylamine. Lors de ces synthèses, il est apparu que les oligomères fortement branchés ont une viscosité supérieure à celle des oligomères linéaires!

Les oligomères hyperbranchés et acrylés, les oligomères linéaires et leurs analogues fortement branchés ont été étudiés du point de vue de leur photoréticulation sous rayonnement UV. Contrairement à ce qui était attendu, ils se sont montrés moins réactifs que les produits les plus performants de Cytec-Surface Specialties. Lors de cette étude, l'effet bénéfique des mines tertiaires sur l'inhibition par l'oxygène est apparu plus complexe que décrit dans la littérature.
Doctorat en sciences appliquées
info:eu-repo/semantics/nonPublished

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Peleška, Jan. "Kinetika koordinační polymerace 1-olefinů katalyzované diiminovými komplexy niklu." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-233353.

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This Ph.D. thesis is focused on kinetic study of propene and hex-1-ene coordination polymerizations initiated by complex [(2-tBuC6H4)N=C(1,8-naphtalenediyl)C=N(2-tBuC6H4)]NiBr2 activated by simple organoaluminium compounds and on product properties. In first three parts proper activators are chosen in model polymerizations. The attention is paid to the reproducibility of polymerizations and analytical methods. The fourth part is focused on propene polymerization kinetics with the aim to define optimal reaction conditions, especially polymerization temperature and time. The four part concerns also properties of polymers. The fifth and sixth parts deal with hex-1-ene polymerization kinetics conducted at various activator/initiator molar ratios and various catalytic precursor concentrations, to find out kinetic orders with respect to catalyst and cocatalyst concentration. Last part is oriented on detail mechanistic investigation of nickel diimine complexes activation process. Results of measurements in presence or absence of monomer enabled to propose new interpretation of UV-vis spectra based on concrete structures of absorbing species.
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Books on the topic "UV-polymerization"

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Neckers, Douglas C., Wolter Jager, and DC Neckers. Photoinitiation for Polymerization: UV & EB at the Millennium, Volume VII, Chemistry & Technology for UV & EB Formulation for Coatings, Inks & Paints. John Wiley & Sons, 1999.

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Book chapters on the topic "UV-polymerization"

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Decker, C., and K. Moussa. "UV-Radiation- and Laser-Induced Polymerization of Acrylic Monomers." In ACS Symposium Series, 439–56. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0417.ch031.

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Bagordo, G., K. H. Brenner, T. M. Merklein, and A. Rohrbach. "Fabrication of Micro-Optic Elements by UV-initiated Polymerization." In TEUBNER-TEXTE zur Physik, 177–91. Wiesbaden: Vieweg+Teubner Verlag, 1993. http://dx.doi.org/10.1007/978-3-322-93430-7_13.

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Bayer, H., and B. Lehner. "UV-Induced Polymerization of Highly Filled Epoxy Resins in Microelectronics." In ACS Symposium Series, 412–25. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0417.ch029.

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Wieser, Ulrich, and Hans-Herbert Brintzinger. "UV/VIS Studies on the Activation of Zirconocene-Based Olefin-Polymerization Catalysts." In Organometallic Catalysts and Olefin Polymerization, 3–13. Berlin, Heidelberg: Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59465-6_1.

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Chen, Ko Shao, Su Chen Chen, Yi Chun Yeh, Hong Ru Lin, Wen Fu Lee, and Heng Hsien Lee. "Comparison with Physics and Chemical Property of SBS/AA Copolymer Using Thermal Polymerization and UV Graft-Polymerization Methods." In THERMEC 2006, 1288–93. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-428-6.1288.

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Broer, D. J., and G. N. Mol. "Oriented Polymers Obtained by UV Polymerization of Oriented Low Molecular Weight Species." In Polymers for High Technology, 417–23. Washington, DC: American Chemical Society, 1987. http://dx.doi.org/10.1021/bk-1987-0346.ch035.

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Bird, D., J. Laquidara, E. Caravaca, K. Luhmann, and N. M. Ravindra. "Formulation of UV Curable Resins Utilized in Vat Photo Polymerization for the Additive Manufacturing of Gun Propulsion Charge in 3D Printers (Update)." In TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings, 1945–54. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36296-6_179.

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Panigrahi, Muktikanta, and Basudam Adhikari. "Inorganic Doped Dl-Polylactide Polyaniline Based Composite for Methane (Ch4) Gas Sensing." In Polyaniline based Composite for Gas Sensors, 191–201. IOR PRESS, 2021. http://dx.doi.org/10.34256/ioriip2127.

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Polyaniline (PANI) nonofibriles have been successfully synthesised by simple chemical-oxidation polymerization method using aniline as a predecessor at room temperature. It was synthesized using H3PO4 dopants. The structure, chemical groups, and electronic transition were investigated by SEM, FTIR, and UV Visible. We present the methane gas response of as-prepared H3PO4 doped DL−PLA/PANI-ES composite film at different concentration. The percentage (%) methane gas response was found to be 9 % at 500ppm.
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Panigrahi, Muktikanta, and Basudam Adhikari. "Poly Methyl Methacrylate (Pmma) Based Polyaniline Composite for Ammonia (Nh3) Gas Sensors." In Polyaniline based Composite for Gas Sensors, 172–90. IOR PRESS, 2021. http://dx.doi.org/10.34256/ioriip2126.

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Inorganic acids (HCl, H2SO4, and H3PO4) doped-PMMA/PANI composites are prepared by in-situ technique via oxidation-polymerization process. Different techniques such as XRD, FTIR, UV-Visible, four-probe method are used to characterize the composite. Presence of different chemical group of the doped composites is analysed by ATR-FTIR spectroscopic analysis. Charge carrier behaviour of the doped composite is analyzed by UV-Visible spectroscopy. Band gap (Eg) of the doped composites is determined from UV-Visible absorption analysis using Tauc expression. The estimated direct band gap energy (Eg) is found to be 1.93 eV (for HCl doped PMMA/PANI composite), 1.19 eV (for H2SO4 doped PMMA/PANI composite), and 1.71 eV (for H3PO4 doped PMMA/PANI composite), respectively. DC-conductivity is measured with and without magnetic field. Temperature dependent DC conductivity is also measured. In addition, we were discussed the response of ammonia (NH3) gas with polyaniline-based sensor materials.
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"Ultraviolet and Visible Spectroscopy." In Organic Spectroscopy Technology and Applications, edited by Manisha C. Kotadiya, 9–33. BENTHAM SCIENCE PUBLISHERS, 2024. https://doi.org/10.2174/9789815313239124010004.

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Ultraviolet and Visible spectroscopy was one of the first instrumental methods for analysis. It may be used to characterise a wide range of materials. The UV-Vis provides information based on the degree of absorption or transmittance of a variable wavelength of beam light and sample responses. The general law known as Beer's law may be used to quantitatively quantify the absorption of radiant energy by materials. The UV-VIS spectrometer is easy to operate and maintain. It may be used in both qualitative and quantitative assessments. Metal and its nanoparticles are commonly measured at wavelengths ranging from 200 to 700 nm. The UV/Vis spectrum can also help us understand the delicate mechanism of complexation between templates, monomers, and cross-linkers during polymerization. It is a rapid, easy, and low-cost characterisation approach. The spectrum may be used to investigate the composition and structure of materials. These findings have applications in academics, business, medical laboratories, and chemical analysis of environmental samples.
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Conference papers on the topic "UV-polymerization"

1

Amirsadeghi, Alborz, Jae Jong Lee, and Sunggook Park. "Polymerization Shrinkage and Adhesion in UV-Nanoimprint Lithography." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62486.

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Ultraviolet nanoimprint lithography (UV-NIL) is a molding-based nanofabrication technique utilizing the change in viscosity of a UV resist upon UV irradiation and is one of the most promising candidates for mass-production lithography [1]. The biggest challenge, however, in UV-NIL is demolding, a process to remove the stamp from the molded substrate. Numerous efforts have been made to make the demolding process easier with the main goal being the reduction in adhesion at the stamp/resist interface. However, it is not only the adhesion at the stamp/resist interface that produces stress during demolding. The force applied to the sidewalls of stamp structures by resist shrinkage occurring during UV curing also contributes to demolding force. Experimental methods such as bilayer beam deflection [2] have been employed to measure stress generated in a thin resist layer during UV curing. However, the stress measured by these methods does not represent the real UV-NIL process in which the resist is locally confined within the stamp structures. To the best of our knowledge, there has been no attempt to experimentally determine the stress by polymerization shrinkage in the actual UV-NIL system.
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2

Ward, Jennifer H., Rafael Gomez, Rashid Bashir, and Nicholas A. Peppas. "UV free-radical polymerization for micropatterning poly(ethylene glycol)-containing films." In International Symposium on Optical Science and Technology, edited by Akhlesh Lakhtakia, Werner S. Weiglhofer, and Russell F. Messier. SPIE, 2000. http://dx.doi.org/10.1117/12.390582.

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3

Fujita, Katsumasa. "Photo-initiator free two-photon polymerization using nonlinear deep-UV excitation." In Molecular and Nano Machines IV, edited by Zouheir Sekkat and Takashige Omatsu. SPIE, 2021. http://dx.doi.org/10.1117/12.2595410.

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4

Park, Min J., Won M. Choi, and O. O. Park. "Cell-micropatterning by micromolding in capillary technique based on UV polymerization." In Microelectronics, MEMS, and Nanotechnology, edited by Dan V. Nicolau. SPIE, 2005. http://dx.doi.org/10.1117/12.638215.

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OHTAKA, TOHRU, CHIKAO TOSAKI, KENICHI ITO, YUJI NAITO, and KATSUTOSHI IGARASHI. "New technique for measuring polymerization heat of UV curable optical fiber coatings." In Optical Fiber Communication Conference. Washington, D.C.: OSA, 1989. http://dx.doi.org/10.1364/ofc.1989.wq9.

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6

Zheng, Lei, Axel Günther, Reinhard Caspary, Wolfgang Kowalsky, and Bernhard Roth. "Integration of UV-nanoimprint lithography with two-photon polymerization for scalable production." In Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XVI, edited by Georg von Freymann, Eva Blasco, and Debashis Chanda. SPIE, 2023. http://dx.doi.org/10.1117/12.2648030.

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7

Wang, Yancheng, Dai Xue, Zhaoxin Deng, and Deqing Mei. "Patterned Microstructure Array Fabrication by Using a Novel Standing Surface Acoustic Wave Device." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2962.

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This paper develops a novel standing surface acoustic wave (SAW) device with three-pair of interdigital transducers (IDTs) to fabricate the patterned microstructure arrays with the assistance of ultraviolet (UV) polymerization. The working principle, structural design, and fabrication of the SAW device are presented. Then experimental setup was conducted to investigate the fabrication process and method of the patterned microstructure arrays on a thin liquid polymer surface. By adjusting the input wavelength and working voltage and selecting the pairs of IDTs, several types of patterned microstructure arrays, such as linear undulate and latticed undulate with different surface morphologies, could be fabricated. Results also demonstrated that the developed SAW device with the assistance of UV polymerization is an effective method to fabricate the patterned microstructure arrays, which may have great potential in the application of biomedical and microelectronic fields.
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8

Ehrlich, D. J., and J. Y. Tsao. "UV-Laser Photodeposition of Patterned Catalyst Films from Adsorbate Mixtures*." In Microphysics of Surfaces, Beams, and Adsorbates. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/msba.1985.wc3.

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It has been demonstrated in recent studies that laser-induced photochemical modifications of surface properties can be used in combination with nonlinear kinetics and interfacial chemistry for maskless patterning of thin films by selected-area growth.1-3 With one exception,3 these new techniques have relied on photochemical lowering of surface-tension barriers to physical condensation, e.g., prenucleation; laser-modification of chemical surface properties will have practical advantages over the use of physical barriers, particularly on surfaces with previously defined structures and crystalline defects.1 In this paper we describe a study in which chemical catalysts have been prepared by local photochemical reaction under UV-laser irradiation. Thin (monolayer) films of these laser-deposited surface agents are shown to predispose surfaces to "spontaneous" polymerization of ethylene or acetylene on exposure to these monomer vapors. The UV-laser deposition reaction for preparation of these catalysts involves a greater-than-unity-order reaction in a mixed-component adsorbed layer of TiCl4 and Al2(CH3)6. The method is far more efficient than direct radiation-driven polymerization, and is of particular interest as a method for the patterning of easily oxidized polymers, many of which are difficult or impossible to pattern by lithographic methods.
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9

Shishkin, I. Yu, S. A. Lapa, and A. V. Chudinov. "SELECTION OF CONDITIONS FOR COVALENT IMMOBILIZATION OF FLUORESCENTLY LABELED OLIGONUCLEOTIDES ON THE SURFACE OF AN ALUMINUM BIOCHIP." In X Международная конференция молодых ученых: биоинформатиков, биотехнологов, биофизиков, вирусологов и молекулярных биологов — 2023. Novosibirsk State University, 2023. http://dx.doi.org/10.25205/978-5-4437-1526-1-151.

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“Polymer brushes” with functional epoxy groups on an aluminum substrate of a biochip were obtained by UV-initiated radical polymerization. The conditions of immobilization of fluorescently labeled oligonucleotide probes with various chaotropic agents were selected on the epoxy groups of the biochip.
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10

Bhattacharyya, Arpita, and Catherine Klapperich. "Fabrication of Polymeric Microfluidic Device for On-Chip Isolation of Nucleic Acids." In ASME 3rd International Conference on Microchannels and Minichannels. ASMEDC, 2005. http://dx.doi.org/10.1115/icmm2005-75200.

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A microfluidic chip-based solid phase extraction method for isolation of nucleic acids is demonstrated. The chip was fabricated in a cyclic polyolefin by hot embossing with a master. The solid phase was made by in-situ UV polymerization of a monolithic column impregnated with silica particles, and separation was achieved due to irreversible binding of the nucleic acids to the silica particles in the monolith. The porous monolithic column was formed within the channels of the device by photoinitiated polymerization of a mixture of methacrylate and dimethacrylate monomers, UV sensitive free radical initiator and porogenic solvent. The channel surface was photografted with a thin interlayer polymer prior to preparation of the monolith in the channel. The grafted layer covalently attached the monolith and prevented the formation of voids between the monolith and the channel surface. The solid-phase prepared by this method allowed for successful extraction and elution of nucleic acids.
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