Photoinitiated bulk polymerization of lauryl acrylate by N-acetyl-4-nitro-1-naphthylamine in the presence of N,N-dimethylaniline

Sastre, R.; Conde, Marcus Cristian Muniz; Mateo, J. L.

doi:10.1016/1010-6030(88)85010-x

Cited by 41 publications

(18 citation statements)

References 14 publications

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“…A detailed description of the photo-differential scanning calorimeter (PDSC) can be found in previous publications. 16,17 In our current work the twin-branch¯exible light guides (each of 50 cm length) were terminated with a ferrule connector which was plugged into the lightguide socket of a cold light source (Schott KL-1500, Germany). This irradiation source permitted the direct regulation of the light intensity in graduated stages by means of a brightness control.…”

Section: Measurement Of Light Absorption and Photopolymerization Kinementioning

confidence: 99%

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Kinetic study of the photopolymerization of a bisphenol-A-bis(glycidylmethacrylate)/triethyleneglycol dimethacrylate system in hydroxyapatite-filled composites

et al. 1999

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Photocurable composites based on hydroxyapatite and quartz as ®llers and a monomeric mixture of bisphenol-A±bis(glycidylmethacrylate)/triethyleneglycol dimethacrylate (40/60 wt%) as a matrix were prepared. Both ®llers were also treated with 3-trimethoxysilylpropyl methacrylate, and the effectiveness of the silane treatment was veri®ed by FTIR spectroscopy.The kinetic study of the photopolymerization of the different composites was carried out at maximum ®ller content, and at variable and constant ®ller contents. The differences found in the kinetic behaviour of the composites are explained using the three-layer model for particulate composites (TLMPC) and the optical phenomenon that takes place by direct interaction of the irradiation light with the ®ller particles.

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Section: Measurement Of Light Absorption and Photopolymerization Kinementioning

confidence: 99%

“…16,17 All polymerizations were carried out in bulk at 40°C. Samples of about 60 mg were accurately weighed, and spread as a layer over the base of 6.5 mm diameter aluminium DSC standard pans.…”

Section: Measurement Of Light Absorption and Photopolymerization Kinementioning

confidence: 99%

Kinetic study of the photopolymerization of a bisphenol-A-bis(glycidylmethacrylate)/triethyleneglycol dimethacrylate system in hydroxyapatite-filled composites

et al. 1999

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“…A detailed description of the modified differential calorimeter can be found in previous papers. [10,11] In our current work the twin-branch flexible light guides (each 50 cm long) are terminated with a ferrule connector, which is plugged into the light guide socket of a cold light source (Schott KL-1500). This irradiation source allows the direct regulation of the light intensity in graduate stages by means of a brightness control.…”

Section: Steady-state Photolysis Of Pm567mentioning

confidence: 99%

Pyrromethene 567 Dye as Visible Light Photoinitiator for Free Radical Polymerization

Garcı́a¹,

Costela²,

García‐Moreno³

et al. 2003

Macro Chemistry & Physics

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In the present work we report on the photochemistry and photopolymerization activity of a new bimolecular photoinitiator system, which exhibits maximum sensitivity at 518 nm, consists of a sensitizer dye, pyrromethene 567 (PM567), and a radical generating reagent 3,3′,4,4′‐tetra(tert‐butylperoxycarbonyl)benzophenone (BTTB). The photosensitization of BTTB through the excitation of PM567 induces high polymerization rates, while different experiences have revealed that PM567 or BTTB, separately, are unable of initiating the polymerization of 2‐hydroxyethyl methacrylate (HEMA) over extensive periods of time at 40 °C, either in the dark or under irradiation. The polymerization efficiency of this photoinitiator system, PM567/BTTB, was analyzed following the bulk polymerization kinetics of monomer HEMA by differential scanning photo‐calorimetry. Photopolymerization rates and quantum yields were observed under isothermal conditions (40 °C) for continuous illumination polymerizations (at 518 nm) at different incident light intensities and different BTTB concentrations.Scheme of the photosensitization process of the bimolecular photoinitiator system of PM567/BTTB.magnified imageScheme of the photosensitization process of the bimolecular photoinitiator system of PM567/BTTB.

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“…As determinações calorimétricas são feitas usando sistemas como o mostrado na Figura 10, que consiste em um calorímetro comercial modificado, [52,53] incorporando um acessório que permite a irradiação da amostra fotopolimerizável simultaneamente à obtenção das curvas exotérmicas.…”

Section: Calorimetriaunclassified

Fotopolimerização: princípios e métodos

Rodrigues

Neumann

2003

Polímeros

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Resumo: O interesse na Fotoquímica de Polímeros tem crescido nas últimas décadas devido não somente ao grande número de novas aplicações como também à repercussão do ponto de vista econômico, técnico e ecológico. A fotopolimerização/fotocura tem recebido a atenção especial devido às incontáveis aplicações e a sua importância na área de Materiais. A cinética destes processos necessita de métodos analíticos precisos e rápidos para ser avaliada. Entre os métodos analíticos convencionais, os mais usados são a gravimetria e a medida de propriedades macroscópicas, como resistência à tração, à deformação e dureza. Entretanto, para determinações mais analíticas é conveniente usar métodos que permitam estudar a cinética de fotopolimerização em tempo real. Neste sentido têm sido usadas técnicas como dilatometria, espectroscopia Raman, calorimetria, e espectroscopia de infravermelho por transformada de Fourier em tempo real. A atividade no campo da polimerização continua a se expandir em muitas áreas e, recentemente, o interesse nos sistemas do fotoiniciação envolvendo a polimerização via radicais livres, iniciada por luz visível, tem recebido atenção especial. Recentemente, estudos sobre fotopolimerização catiônica induzida pela luz visível começaram a ser pesquisados novamente devido à grande variedade de monômeros que são polimerizáveis por via catiônica mas não por via radicar, como, por exemplo, oxiranas e éteres vinílicos. Palavras-chave: Fotopolimerização catiônica, fotopolimerização via radicalar, dilatometria, calorimetria, gravimetria, espectroscopia de infravermelho por transformada de Fourier. Photopolymerization: Principles and MethodsAbstract: The interest for Polymer Photochemistry has been growing in the last decades as a consequence not only of the great number of new applications as well as due to the repercussion of economical, technical and ecological characters. The photopolymerization -photocuring processes have received special attention due to the countless and important applications in the area of Materials. The kinetics of these processes needs fast and precise analytic methods to be evaluated. Among the conventional analytic methods, the most used are gravimetry and the determination of macroscopic properties, as resistance to traction, deformation and hardness. However, for a better insight in the reactions it is convenient to use more advanced analytic methods, in order to study the photopolymerization kinetics in real time. Dilatometry, Raman spectroscopy, calorimetry, and real time Fourier transform infrared spectroscopy are some of the techniques that have been used. Activity in the field of photopolymerization continues to expand in many areas and recently, the interest in photoinitiation systems involving the initiation of free-radical polymerization with visible light irradiation has been retaken. Additionally, studies on cationic photopolymerization induced by visible light started again to be studied because of the large variety of monomers that can be photopolymerized by via cation ini...

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Photoinitiated bulk polymerization of lauryl acrylate by N-acetyl-4-nitro-1-naphthylamine in the presence of N,N-dimethylaniline

Cited by 41 publications

References 14 publications

Kinetic study of the photopolymerization of a bisphenol-A-bis(glycidylmethacrylate)/triethyleneglycol dimethacrylate system in hydroxyapatite-filled composites

Kinetic study of the photopolymerization of a bisphenol-A-bis(glycidylmethacrylate)/triethyleneglycol dimethacrylate system in hydroxyapatite-filled composites

Pyrromethene 567 Dye as Visible Light Photoinitiator for Free Radical Polymerization

Fotopolimerização: princípios e métodos

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