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Noirbent G, Dumur F. Photoinitiators of polymerization with reduced environmental impact: Nature as an unlimited and renewable source of dyes. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110109] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Thioxanthone Derivatives as a New Class of Organic Photocatalysts for Photopolymerisation Processes and the 3D Printing of Photocurable Resins under Visible Light. Catalysts 2020. [DOI: 10.3390/catal10080903] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
In the present paper, novel thioxanthone-based compounds were synthesised and evaluated as a component of photoredox catalysts/photoinitiating systems for the free-radical polymerisation (FRP) of acrylates and the ring-opening cationic polymerisation (CP) of epoxy monomers. The performance of the obtained thioxanthones in two- and three-component photoinitiating systems, in combination with amines, iodonium or sulphonium salt, as well as with alkyl halide, for photopolymerisation processes upon exposure to light emitting diodes (LEDs) with a maximum emission of 405 nm and 420 nm, was investigated. The studied compounds act also as one-component free-radical photoinitiators. Fourier transform real-time infrared spectroscopy was used to monitor the kinetics of disappearance of the functional groups of the monomers during photoinitiated polymerisation. Excellent photoinitiating efficiency and high final conversions of functional groups were observed. Moreover, the influence of thioxanthone skeleton substitution on photoinitiating efficiency was discussed. The photochemical mechanism was also investigated through cyclic voltammetry. It was discovered that thioxanthone derivatives can be used as a metal-free photoredox catalyst active for both oxidative and reductive cycles. Furthermore, a photopolymerizable system based on novel thioxanthone derivatives in a stereolithography three-dimensional (3D) printing technology under visible sources of light was used. The effects of photoinitiator type system and monomer type in photoresins during 3D printing processes were explored. The outcome of this research is the development of high-performance visible photosensitive resins with improved photosensitivity obtained thanks to the development of entirely novel photoinitiating systems specifically adapted for this application.
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Abedin F, Ye Q, Parthasarathy R, Misra A, Spencer P. Polymerization behavior of hydrophilic-rich phase of dentin adhesive. J Dent Res 2015; 94:500-7. [PMID: 25576471 DOI: 10.1177/0022034514565646] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The 2-fold objectives of this study were 1) to understand whether model hydrophobic- and hydrophilic-rich phase mimics of dentin adhesive polymerize similarly and 2) to determine which factor, the dimethacrylate component, bisphenol A glycerolate dimethacrylate (BisGMA) or photoinitiator concentration, has greater influence on the polymerization of the hydrophilic-rich phase mimic. Current dentin adhesives are sensitive to moisture, as evidenced by nanoleakage in the hybrid layer and phase separation into hydrophobic- and hydrophilic-rich phases. Phase separation leads to limited availability of the cross-linkable dimethacrylate monomer and hydrophobic photoinitiators within the hydrophilic-rich phase. Model hydrophobic-rich phase was prepared as a single-phase solution by adding maximum wt% deuterium oxide (D2O) to HEMA/BisGMA neat resins containing 45 wt% 2-hydroxyethyl methacrylate (HEMA). Mimics of the hydrophilic-rich phase were prepared similarly but using HEMA/BisGMA neat resins containing 95, 99, 99.5, and 100 wt% HEMA. The hydrophilic-rich mimics were prepared with standard or reduced photoinitiator content. The photoinitiator systems were camphorquinone (CQ)/ethyl 4-(dimethylamino)benzoate (EDMAB) with or without [3-(3, 4-dimethyl-9-oxo-9H-thioxanthen-2-yloxy)-2-hydroxypropyl]trimethylammonium chloride (QTX). The polymerization kinetics was monitored using a Fourier transform infrared spectrophotometer with a time-resolved collection mode. The hydrophobic-rich phase exhibited a significantly higher polymerization rate compared with the hydrophilic-rich phase. Postpolymerization resulting in the secondary rate maxima was observed for the hydrophilic-rich mimic. The hydrophilic-rich mimics with standard photoinitiator concentration but varying cross-linker (BisGMA) content showed postpolymerization and a substantial degree of conversion. In contrast, the corresponding formulations with reduced photoinitiator concentrations exhibited lower polymerization and inhibition/delay of postpolymerization within 2 h. Under conditions relevant to the wet, oral environment, photoinitiator content plays an important role in the polymerization of the hydrophilic-rich phase mimic. Since the hydrophilic-rich phase is primarily water and monomethacrylate monomer (e.g., HEMA as determined previously), substantial polymerization is important to limit the potential toxic response from HEMA leaching into the surrounding tissues.
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Affiliation(s)
- F Abedin
- Bioengineering Research Center, University of Kansas, Lawrence, KS, USA Bioengineering Graduate Program, University of Kansas, Lawrence, KS, USA
| | - Q Ye
- Bioengineering Research Center, University of Kansas, Lawrence, KS, USA
| | - R Parthasarathy
- Bioengineering Research Center, University of Kansas, Lawrence, KS, USA
| | - A Misra
- Bioengineering Research Center, University of Kansas, Lawrence, KS, USA Department of Civil Engineering, University of Kansas, Lawrence, KS, USA
| | - P Spencer
- Bioengineering Research Center, University of Kansas, Lawrence, KS, USA Department of Mechanical Engineering, University of Kansas, Lawrence, KS, USA
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Shi J, Chen P, Wang K, Lu J, Nie J. A novel high efficiency benzophenone based polymeric photoinitiator from ring-opening polymerization of benzoxazine. POLYMER SCIENCE SERIES B 2014. [DOI: 10.1134/s1560090414050121] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abedin F, Ye Q, Good HJ, Parthasarathy R, Spencer P. Polymerization- and solvent-induced phase separation in hydrophilic-rich dentin adhesive mimic. Acta Biomater 2014; 10:3038-47. [PMID: 24631658 DOI: 10.1016/j.actbio.2014.03.001] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Revised: 02/12/2014] [Accepted: 03/03/2014] [Indexed: 11/30/2022]
Abstract
Current dental resin undergoes phase separation into hydrophobic-rich and hydrophilic-rich phases during infiltration of the over-wet demineralized collagen matrix. Such phase separation undermines the integrity and durability of the bond at the composite/tooth interface. This study marks the first time that the polymerization kinetics of model hydrophilic-rich phase of dental adhesive has been determined. Samples were prepared by adding varying water content to neat resins made from 95 and 99 wt.% hydroxyethylmethacrylate and 5 and 1 wt.% (2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy)phenyl1]-propane prior to light curing. Viscosity of the formulations decreased with increased water content. The photopolymerization kinetics study was carried out with a time-resolved Fourier transform infrared spectrometer. All of the samples exhibited two-stage polymerization behavior which has not been reported previously for dental resin formulation. The lowest secondary rate maxima were observed for water contents of 10-30 wt.%. Differential scanning calorimetry (DSC) showed two glass transition temperatures for the hydrophilic-rich phase of dental adhesive. The DSC results indicate that the heterogeneity within the final polymer structure decreased with increasing water content. The results suggest a reaction mechanism involving both polymerization-induced phase separation and solvent-induced phase separation for the model hydrophilic-rich phase of dental resin.
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Affiliation(s)
- Farhana Abedin
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Bioengineering Graduate Program, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Qiang Ye
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA.
| | - Holly J Good
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Ranganathan Parthasarathy
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Paulette Spencer
- Bioengineering Research Center, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
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6
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Wang S, Zou Y. Synthesis, characterization, and UV-curing properties of silicon-containing (Meth)acrylate monomers. J Appl Polym Sci 2013. [DOI: 10.1002/app.38943] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Investigation of termination reactions in free radical photopolymerization of UV powder formulations. Eur Polym J 2012. [DOI: 10.1016/j.eurpolymj.2012.05.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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8
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Hwang HD, Kim HJ. UV-curable low surface energy fluorinated polycarbonate-based polyurethane dispersion. J Colloid Interface Sci 2011; 362:274-84. [DOI: 10.1016/j.jcis.2011.06.044] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Revised: 06/15/2011] [Accepted: 06/18/2011] [Indexed: 11/16/2022]
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9
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Bayramoğlu G, Kayaman-Apohan N, Kahraman MV, Karadenizli S, Kuruca SE, Güngör A. Preparation of bow tie-type methacrylated poly(caprolactone-co-lactic acid) scaffolds: effect of collagen modification on cell growth. POLYM ADVAN TECHNOL 2011. [DOI: 10.1002/pat.2059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gülay Bayramoğlu
- Faculty of Engineering, Department of Polymer Engineering; Yalova University; 77100; Yalova; Turkey
| | | | | | - Sabriye Karadenizli
- Istanbul Faculty of Medicine; Istanbul University; 34390; Capa; Istanbul; Turkey
| | - Serap Erdem Kuruca
- Istanbul Faculty of Medicine; Istanbul University; 34390; Capa; Istanbul; Turkey
| | - Atilla Güngör
- Department of Chemistry; Marmara University; 34722; Goztepe; Istanbul; Turkey
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Ghasaban S, Atai M, Imani M, Zandi M, Shokrgozar MA. Photo-crosslinkable cyanoacrylate bioadhesive: Shrinkage kinetics, dynamic mechanical properties, and biocompatibility of adhesives containing TMPTMA and POSS nanostructures as crosslinking agents. J Biomed Mater Res A 2011; 99:240-8. [DOI: 10.1002/jbm.a.33181] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 05/01/2011] [Accepted: 05/20/2011] [Indexed: 11/11/2022]
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11
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Hwang HD, Kim HJ. Enhanced thermal and surface properties of waterborne UV-curable polycarbonate-based polyurethane (meth)acrylate dispersion by incorporation of polydimethylsiloxane. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2011.03.004] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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12
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Nair JR, Gerbaldi C, Destro M, Bongiovanni R, Penazzi N. Methacrylic-based solid polymer electrolyte membranes for lithium-based batteries by a rapid UV-curing process. REACT FUNCT POLYM 2011. [DOI: 10.1016/j.reactfunctpolym.2010.12.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Zhuo D, Ruan Y, Zhao X, Ran R. Kinetics of UV-initiated RAFT crosslinking polymerization of dimethacrylates. J Appl Polym Sci 2011. [DOI: 10.1002/app.33721] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Wei J, Wang B. A Highly Efficient Polymerizable Photoinitiator Comprising Benzophenone, Thio Moieties, and N-Arylmaleimide. MACROMOL CHEM PHYS 2010. [DOI: 10.1002/macp.201000535] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Effect of photosensitive groups on the photoefficiency of polymeric photoinitiators. JOURNAL OF POLYMER RESEARCH 2010. [DOI: 10.1007/s10965-010-9500-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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ZHUO D, CHEN Z, WANG X, RUAN Y, ZHAO X, RAN R. PHOTOINITIATED RAFT CROSSLINKING POLYMERIZATION OF POLYETHYLENE GLYCOL DIMETHACRYLATES. ACTA POLYM SIN 2010. [DOI: 10.3724/sp.j.1105.2010.09185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Bayramoğlu G, Kayaman-Apohan N, Akçakaya H, Vezir Kahraman M, Erdem Kuruca S, Güngör A. Preparation of collagen modified photopolymers: a new type of biodegradable gel for cell growth. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:761-775. [PMID: 19936889 DOI: 10.1007/s10856-009-3929-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 10/30/2009] [Indexed: 05/28/2023]
Abstract
In this study a new branched methacrylated poly(propylene glycol-co-lactic acid) (PPG-PLA-IEM) and methacrylated cellulose acetate butyrate resin (CAB-IEM) were synthesized. Hydrogels with various amounts of PPG-PLA-IEM and CAB-IEM (25, 50 and 75 wt% IEM modified) were prepared by photopolymerization. Collagen tethered PEG-monoacrylate (PEGMA-collagen) was prepared and introduced as a bioactive moiety to modify the hydrogel in order to enhance cell affinity. In vitro attachment and growth of 3T3 mouse fibroblasts and human umbilical vein endothelial cells (HUVEC) on the hydrogels with and without collagen were also investigated. It was observed that, the collagen improves the cell adhesion onto the hydrogel surface. With the increasing amount of collagen, cell viability increased by 28% for ECV304 (P < 0.05) and 30% for 3T3 (P < 0.05).
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Affiliation(s)
- Gülay Bayramoğlu
- Faculty of Engineering, Department of Polymer Engineering, Yalova University, 77100 Yalova, Turkey
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Wen Y, Jiang X, Liu R, Yin J. Amphipathic hyperbranched polymeric thioxanthone photoinitiators (AHPTXs): Synthesis, characterization and photoinitiated polymerization. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.06.065] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Wei J, Lu R, Liu F. Novel, highly efficient polymeric benzophenone photoinitiator containing coinitiator moieties for photopolymerization. POLYM ADVAN TECHNOL 2009. [DOI: 10.1002/pat.1486] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Wen Y, Jiang X, Yin J. Polymeric Michler's ketone photoinitiator containing coinitiator amine. POLYM ENG SCI 2009. [DOI: 10.1002/pen.21335] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Naves AF, Carmona-Ribeiro AM, Casarano R, Catalani LH, Kawano Y, Petri DF. Crystalline particles from self-assembled divinyl oligomers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2009. [DOI: 10.1016/j.msec.2008.10.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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22
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Wang Y, Jiang X, Yin J. Novel polymeric photoinitiators comprising of side-chain benzophenone and coinitiator amine: Photochemical and photopolymerization behaviors. Eur Polym J 2009. [DOI: 10.1016/j.eurpolymj.2008.10.039] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Wei J, Liu F, Lu Z, Song L, Cai D. Novel PU-type polymeric photoinitiator comprising side-chain benzophenone and coinitiator amine for photopolymerization of PU acrylate. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1192] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Synthesis of telechelic methacrylic siloxanes with cycloaliphatic substituents groups for UV-curable applications. Eur Polym J 2008. [DOI: 10.1016/j.eurpolymj.2008.07.051] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wei J, Jiang XS, Wang HY. Effect of the Structure of Photosensitive Groups Contained in Novel PU-Type Polymeric Benzophenone Photoinitiators on Photopolymerization. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200700243] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Chen YC, Ferracane JL, Prahl SA. Quantum yield of conversion of the photoinitiator camphorquinone. Dent Mater 2007; 23:655-64. [PMID: 16859741 DOI: 10.1016/j.dental.2006.06.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2005] [Revised: 05/22/2006] [Accepted: 06/09/2006] [Indexed: 11/23/2022]
Abstract
The primary absorber in dental resins is the photoinitiator, which starts the photo polymerization process. We studied the quantum yield of conversion of camphorquinone (CQ), a blue light photoinitiator, in dental resin composites using a LED lamp (3M FreeLight) and a Quartz Tungsten Halogen (QTH) lamp (VIP) as the light curing units at five different irradiances. The molar extinction coefficient, epsilon(469), of CQ was 46+/-2 cm(-1)/(mol/L) at 469 nm. The reciprocity of irradiance and exposure time holds for changes of CQ absorption coefficient, that is, irradiance x exposure time (=radiant exposure)=constant. Both LED and QTH lamps yielded the same curing threshold (the radiant exposure when CQ absorption drops to 1/e) and the same quantum yield conversion under different irradiances. In our dental resin formulation (0.7 wt.% CQ with reducing agents 0.35 wt.% dimethylaminoethyl methacrylate (DMAEMA) and 0.05 wt.% butylated hydroxytoluene (BHT)) the quantum yield was measured as 0.07+/-0.01 CQ conversion per absorbed photon.
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Affiliation(s)
- Yin-Chu Chen
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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Wei J, Wang H, Jiang X, Yin J. Study of Novel PU-Type Polymeric Photoinitiators Comprising of Side-Chain Benzophenone and Coinitiator Amine: Effect of Macromolecular Structure on Photopolymerization. MACROMOL CHEM PHYS 2007. [DOI: 10.1002/macp.200600520] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Jakubiak J, Wrzyszczyński A, Linden LÅ, Rabek JF. The Role of Amines in the Camphorquinone Photoinitiated Polymerization of Multifunctional Monomer. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2007. [DOI: 10.1080/10601320601031440] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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29
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Nebioglu A, Soucek MD. Microgel formation and thermo-mechanical properties of UV-curing unsaturated polyester acrylates. J Appl Polym Sci 2007. [DOI: 10.1002/app.27381] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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30
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Wei J, Wang H, Yin J. Novel polymeric, thio-containing photoinitiator comprising in-chain benzophenone and an amine coinitiator for photopolymerization. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/pola.21818] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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Evaluation of new materials for plasmonic imaging lithography at 476 nm using near field scanning optical microscopy. ACTA ACUST UNITED AC 2007. [DOI: 10.1116/1.2757184] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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32
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Wei J, Wang H, Jiang X, Yin J. A Highly Efficient Polyurethane-Type Polymeric Photoinitiator Containing In-chain Benzophenone and Coinitiator Amine for Photopolymerization of PU Prepolymers. MACROMOL CHEM PHYS 2006. [DOI: 10.1002/macp.200600436] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Wei J, Wang H, Jiang X, Yin J. Effect on Photopolymerization of the Structure of Amine Coinitiators Contained in Novel Polymeric Benzophenone Photoinitiators. MACROMOL CHEM PHYS 2006. [DOI: 10.1002/macp.200600274] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Nebioglu A, Soucek MD. Reaction kinetics and microgel particle size characterization of ultraviolet-curing unsaturated polyester acrylates. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/pola.21744] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Wang H, Shi Y, Wei J, Jiang X, Yin J. ESR and kinetic study of a novel polymerizable photoinitiator comprising the structure ofN-phenylmaleimide and benzophenone for photopolymerization. J Appl Polym Sci 2006. [DOI: 10.1002/app.23840] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Janda R, Roulet JF, Latta M, Steffin G, Rüttermann S. Color stability of resin-based filling materials after aging when cured with plasma or halogen light. Eur J Oral Sci 2005; 113:251-7. [PMID: 15953251 DOI: 10.1111/j.1600-0722.2005.00217.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The influence of curing devices and curing times on the color stability of filling resins was investigated by measuring the CIE-Laboratory-values after performing dry storage, water storage, and a Suntest (EN ISO 7491). Eight samples each of Charisma (CH), Durafill (DU), Definite (DE), and Dyract AP (DY) were light cured by using Translux Energy (TE) for 20, 40 or 60 s, or by using Apollo 95E (AP) for 3, 10 or 20 s. Minor color changes occurred for all dry stored materials, devices and curing times. The TE-cured, water-stored samples behaved similarly to the dry-stored ones, but the samples cured with AP revealed very strong color changes, mainly because of a drastic bleaching process. The bleaching of DU was significantly less than that of the other materials, but a strong white shift occurred. CH, DE, and DU showed very little (and even acceptable) discolorations after the Suntest when TE-cured. DY showed a drastically discoloration. All samples cured using AP drastically bleached and shifted to white for DU and DY but to dark for DE. In conclusion, the extent of discoloration depends on (i) the material, (ii) the test method, (iii) curing time, and (iv) the curing device. The halogen light-cured samples performed best.
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Affiliation(s)
- Ralf Janda
- Heinrich-Heine-University Düsseldorf, Medical Faculty, Center of Dentistry, Moorenstrasse 5, Geb. 18.73, D-40225 Düsseldorf, Germany.
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Jiang X, Yin J. Study of macrophotoinitiator containing in-chain thioxanthone and coinitiator amines. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.05.050] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Liu H, Chen M, Huang Z, Xu K, Zhang X. The influence of silicon-containing acrylate as active diluent on the properties of UV-cured epoxydiacrylate films. Eur Polym J 2004. [DOI: 10.1016/j.eurpolymj.2003.10.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Jiang X, Yin J. Copolymeric photoinitiators containing in-chain thioxanthone and coinitiator amine for photopolymerization. J Appl Polym Sci 2004. [DOI: 10.1002/app.21178] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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