Chemiluminescence Processes in Polymeric Materials

Corrales, Teresa; Peinado, C.; Abrusci, Concha; Allen, Norman S.; Catalina, F.

doi:10.1002/9780470594179.ch3

Cited by 9 publications

(12 citation statements)

References 97 publications

(97 reference statements)

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“…Among Type II photoinitiators, thioxanthone derivatives in conjunction with tertiary amines are efficient photoinitiators with absorption characteristics that compare favorably with benzophenones. [9][10][11][12][13] We recently reported 14 the use of a thiol derivative of thioxanthone (TX-SH; Scheme 2) as photoinitiator for free radical polymerization. A great advantage of this initiator is related to its one component nature.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic Study of Photoinitiated Free Radical Polymerization Using Thioxanthone Thioacetic Acid as One-Component Type II Photoinitiator

et al. 2005

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A mechanistic study concerning photoinitiated free radical polymerization using thioxanthone thio-acetic acid (TX-S-CH 2-COOH) as one-component Type II photoinitiator was performed. Steady-state and time-resolved fluorescence and phosphorescence spectroscopy, as well as laser flash photolysis was employed to study the photophysics and photochemistry of TX-S-CH 2-COOH. The initiator undergoes efficient intersystem crossing into the triplet state and the lowest triplet state posseses π-π* configuration. In contrast to the unsubstituted thioxanthone, TX-S-CH 2-COOH shows an unusually short triplet lifetime (65 ns) indicating an intramolecular reaction. From fluoroscence, phosphorescence, and laser flash photolysis studies, in conjunction with photopolymerization experiments, we propose that TX-S-CH 2-COOH triplets undergo intramolecular electron transfer followed by hydrogen abstraction and decarboxylation producing alkyl radicals, which are the active initiator radicals in photoinduced polymerization. At low initiator concentrations (below 5 × 10 -3 M) this intramolecular reaction is the dominant path. At concentrations above 5 × 10 -3 M, however, the respective intermolecular reactions may be operative.

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Section: Introductionmentioning

confidence: 99%

Mechanistic Study of Photoinitiated Free Radical Polymerization Using Thioxanthone Thioacetic Acid as One-Component Type II Photoinitiator

et al. 2005

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“…Although the activated co-initiator (a radical) is incorporated to ends of polymer chains, the fraction that is not activated during the photopolymerization remains in the sol fraction of the final material. A possible way to avoid this problem is to use polymeric or polymerizable photoinitiators [5][6][7]. A novel photoinduced simultaneous polymerization and crosslinking of monovinyl monomers containing pendant hydroxyl groups has been recently reported based on the use of specially designed benzodioxinones [8].…”

Section: Introductionmentioning

confidence: 99%

Silsesquioxane functionalized with methacrylate and amine groups as a crosslinker/co-initiator for the synthesis of hydrogels by visible-light photopolymerization

Gómez

Fasce

Williams

et al. 2008

Polymer

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“…Different photoinitiators were developed to initiate the polymerisation of the acrylate and styrene systems, which exhibit good chemical, optical and mechanical properties [7]. The absorption spectra of the photoinitiator, the transmission spectra of the pigment and the emission spectra of the UV lamp need to be adjusted to reach appropriate crosslinking of the binder [4,7,21]. It has been established that the dispersion needs to contain at least 0.3% of the photoinitiator and at least 10% of the binder [4].…”

Section: Introductionmentioning

confidence: 99%

Properties of ink‐jet printed, ultraviolet‐cured pigment prints in comparison with screen‐printed, thermo‐cured pigment prints

Mikuž¹,

Turk

Tavčer

2010

Coloration Technology

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A collection of printed fabrics for men’s shirts was designed and prepared using computer‐aided design/computer‐aided manufacturing technology. The colours for designs were ink‐jet printed on cotton fabrics with pigments and ultraviolet‐cured. These prints represented the target colours for subsequent flat‐screen printing, which was performed using pigment printing pastes and thermal curing. For an exact transfer of colours of the ink‐jet‐printed standard into the screen‐printing process, a computer recipe prediction method was used. A comparison of colorimetric parameters of fabrics printed with both printing techniques shows minimal and acceptable differences in the CIELab colour values. A comparison of colour fastness properties proves that very good colour fastness is achieved on the pigment‐printed fabrics produced with both printing techniques. The flat‐screen‐printed fabrics show better colour fastness to washing, perspiration and rubbing, while ink‐jet‐printed fabrics show better colour fastness to dry‐cleaning and light. The fabrics printed with both printing techniques have high rigidity and non‐elastic properties. The mechanical and physical parameters are strongly dependent upon the amount of the dry substance of the printing media applied on the cotton fabric surface, which is higher on screen‐printed fabrics. The ink‐jet‐printed fabrics show better air permeability than flat‐screen‐printed fabrics.

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Chemiluminescence Processes in Polymeric Materials

Cited by 9 publications

References 97 publications

Mechanistic Study of Photoinitiated Free Radical Polymerization Using Thioxanthone Thioacetic Acid as One-Component Type II Photoinitiator

Mechanistic Study of Photoinitiated Free Radical Polymerization Using Thioxanthone Thioacetic Acid as One-Component Type II Photoinitiator

Silsesquioxane functionalized with methacrylate and amine groups as a crosslinker/co-initiator for the synthesis of hydrogels by visible-light photopolymerization

Properties of ink‐jet printed, ultraviolet‐cured pigment prints in comparison with screen‐printed, thermo‐cured pigment prints

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