UV photo curing of N,N′-bismaleimido-4, 4′-diphenylmethane

Abadie, M. J. M.; Xiong, Yan; Boey, Freddy

doi:10.1016/s0014-3057(02)00367-1

Cited by 17 publications

(10 citation statements)

References 11 publications

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“…The degree of conversion obtained then reaches a maximum and starts to decrease thereafter. This is in accordance with the effect seen in the photopolymerization of other systems [141,142] and has been attributed to excess initiator molecules at higher concentrations absorbing most of the light intensity in the surface layer, preventing it from penetrating the entire depth of the sample. The optimum amount of photoinitiator is one that minimizes this absorption, as well as gives a high degree of monomer conversion.…”

Section: Figure 3 Typical Dpc Curve From Photopolymerization Of Dialsupporting

confidence: 88%

Synthesis and characterization of novel biodegradable crosslinked polyesters

Herath¹

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3.3.7. Cytotoxicity of crosslinked polymers 3.3.8. Cytotoxicity of degradation products of photocrosslinked system 4. Results and Discussion 4.1. Photocrosslinked system 4.1.1. UV-polymerizability of diallyl tartrate 4.1.2. Degree of cure of larger samples 4.1.3. T g measurement of photopolymerized diallyl tartrate 4.1.4. Biodegradation of photopolymerized diallyl tartrate 4.1.5. Cytotoxicity of photopolymerized diallyl tartrate 4.1.6.

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Section: Figure 3 Typical Dpc Curve From Photopolymerization Of Dialsupporting

confidence: 88%

Synthesis and characterization of novel biodegradable crosslinked polyesters

Herath¹

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“…UV-induced curing of thermosetting systems involving maleimides have been investigated with regard to the resulting structures, 6,7 kinetics and mechanism, 7-10 bulk and surface properties 11 reactivity, 8,9 effect of the UV dosage, 10 effect of the photoinitiators, and curing temperature. 12 None of these studies, however, have proposed a generally valid kinetic rate equation, with the sole exception of the Decker's study, 9 in which a kinetic rate equation was introduced for a special system. Decker investigated the influence of the light intensity on the cure kinetic of a DVE-3/Qbond system, where DVE-3 refers to divinyl ether of triethyleneglycol, and Q-bond is a liquid bismaleimide with a 36-carbon-atom cycloaliphatic branched structure from Quantum Materials; Decker proposed the following kinetic rate equation:…”

Section: Introductionmentioning

confidence: 99%

“…UV‐induced curing of polymer coatings has until recently been dominated by photoinitiated radical polymerization processes, partly because of their curing efficiency. UV‐induced curing of thermosetting systems involving maleimides have been investigated with regard to the resulting structures,6, 7 kinetics and mechanism,7–10 bulk and surface properties11 reactivity,8, 9 effect of the UV dosage,10 effect of the photoinitiators, and curing temperature 12. None of these studies, however, have proposed a generally valid kinetic rate equation, with the sole exception of the Decker's study,9 in which a kinetic rate equation was introduced for a special system.…”

Section: Introductionmentioning

confidence: 99%

Kinetic rate equation combining ultraviolet‐induced curing and thermal curing. I. Bismaleimide system

Lin

Huang

Yen

et al. 2009

J of Applied Polymer Sci

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A novel and general kinetic rate equation combining ultraviolet-induced (UV-induced) curing and thermal curing was successfully derived from the conventional thermal-kinetic rate equation. This proposed novel kinetic rate equation can be applicable to the curing system either simultaneously or individually by UV-induced and thermal cure methods. This general kinetic rate equation is composed of the reaction order n, activation energy E a , curing temperature T, energy barrier of photoinitiation E Q , intensity of UV radiation Q, concentration of photoinitiator [I], and a few other parameters. The proposed equation was supported by experimental data based on the curing systems of 4,4 0 -bismaleimidodiphenylmethane (BMI) and 2,2-bis(4-(4 maleimido phenoxy) phenyl propane (BMIP). The BMI and BMIP systems were isothermally cured at various temperatures, or simultaneously cured with varying intensity of UV radiation (wavelength 365 nm). Conversion levels for the various cured samples were subsequently measured with a FTIR spectrometer. The reaction order n ¼ 1.2, activation energy E a ¼ 40,800 J/mol, and E Q ¼ 7.5 mW/cm 2 were obtained for curing BMI system. The reaction order n ¼ 1.3, activation energy E a ¼ 53,000 J/mol, and E Q ¼ 9.1 mW/cm 2 were obtained for curing BMIP system. The values of n and E a in the same curing system (BMI or BMIP) are irrespective of the curing method (either simultaneously or individually by UV-induced and thermal cure methods). The salient results of this study show that UV radiation only enhances the initiation rate and UV ration do not influence the activation energy E a . The experimental results are reasonably well represented by these semi-empirical expressions.

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“…Photo-initiated curing reactions are powerful processes to quickly create highly cross-linked polymer networks by supplying an appropriate form of energy, generally ultraviolet (UV) light, to a thermosetting material like epoxy, unsaturated polyester, acrylic resins etc., containing photo initiating species [1][2][3][4][5] In recent years, epoxy acrylate prepolymer suitable for use in ultraviolet (UV) curing systems, command the largest use in the market and are typically used in applications ranging from paper and card over-print varnishes, wood coatings, screen and lithographic inks and solder resist inks for printed circuit boards 6-9. Other areas such as vacuum metallizing base coatings, adhesive laminates, release coatings and video disc coatings are also becoming more important 10. Epoxy acrylates are noted for adhesive properties, flexibility, nonyellowing, hardness, and chemical resistance 11-13. The epoxy backbone promotes tough-ness and flexibility to cured films whilst the carbon-carbon and ether bonds of the same improve the chemical resistance. The epoxy acrylate resins have the merits of: (a) high reactivity (b) possibility of structural variation in backbone (e.g.…”

Section: Introductionmentioning

confidence: 99%

Studies on the Influence of Monomers on the Performance Properties of Epoxy Acrylate Resin

Sharma

Agarwal

Singh

2008

Journal of Chemistry

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Twelve blend samples were prepared by physical mixing of epoxy acrylate resins with various monomersviz. ethoxylated phenol monoacrylate (EOPA), tripropylene glycol diacrylate (TPGDA) and trimethylol propane tri acrylate(TMPTA), having weight ratio of epoxy acrylate resin and monomers are 50:50, 60:40, 70:30, 80:20. These samples were cured under UV radiation using 5% photo initiator by weight. These blends were evaluated for mechanical, chemical & thermal properties. It was found that the sample having mono & tri functional monomers shows better properties than the samples having di functional monomer.

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UV photo curing of N,N′-bismaleimido-4, 4′-diphenylmethane

Cited by 17 publications

References 11 publications

Synthesis and characterization of novel biodegradable crosslinked polyesters

Synthesis and characterization of novel biodegradable crosslinked polyesters

Kinetic rate equation combining ultraviolet‐induced curing and thermal curing. I. Bismaleimide system

Studies on the Influence of Monomers on the Performance Properties of Epoxy Acrylate Resin

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