Photopolymerization of methyl methacrylate: effects of photochemical and photonic parameters on the chain length
Literature Information
V. Charlot, A. Ibrahim, X. Allonas, C. Croutxé-Barghorn, C. Delaite
The effects of photochemical and photonic parameters are investigated on the chain length of poly(methylmethacrylate) (PMMA) as formed by the free radical photopolymerization process. Different photoinitiators were tested for the photopolymerization of PMMA. The Type II system based on isopropyl thioxanthone (ITX)–ethyl 4-(dimethylamino)benzoate (EDB) gave the best result. The conversion reaches 80% in 20 min contrary to Type I photoinitiators. The decrease of the ITX concentrations from 3 wt% to 0.05 wt% allows the formation of higher chains of PMMA with Mw = 170 000 g mol−1, thanks to the decrease in photogenerated radicals. However, there was almost no influence of light intensity on polymer chains. To optimize the chain length of photopolymerized PMMA, Triazine A (TA) was added to reduce the formation of ketyl radicals arising from the reaction of ITX with EDB. The mechanism of the reaction of this three-component photoinitiating system studied by LFP confirmed the creation of ketyl radicals and their oxidation by TA. Then, the use of this three-component system increases both the kinetics of polymerization and the final conversion by virtue of the decrease in ketyl radicals, which act as terminating agents, and a concomitant increase of initiating radicals as formed from the reduced TA. Moreover, thanks to these new sources of initiating radicals, photopolymerization can take place at lower intensity of light. With TA, it was found possible to photopolymerize under very soft conditions and to allow the formation of longer polymer chains with Mw = 200 000 g mol−1 at 1 mW cm−2.
Related Literature
Thiol–isocyanate “click” reactions: rapid development of functional polymeric surfaces
Ryan M. Hensarling, Santosh B. Rahane, Arthur P. LeBlanc, Bradley J. Sparks, Evan M. White, Jason Locklin, Derek L. Patton
DOI: 10.1039/C0PY00292E
Synthesis of glycopolypeptides by the ring opening polymerization of O-glycosylated-α-amino acid N-carboxyanhydride (NCA)
Debasis Pati, Ashif Y. Shaikh, Sayam Sen Gupta
DOI: 10.1039/C0PY00412J
A study on the hydrogen bonding interaction of the electrospun ladder polyphenylsilsesquioxane/polyisophthalamide composite fibers by ATR FT-IR
Zhongjie Ren, Rongben Zhang, Feng Wang, Shouke Yan
DOI: 10.1039/C0PY00274G
Synthesis of highly porous borazine-linked polymers and their application to H2, CO2, and CH4 storage
Karl T. Jackson, Mohammad G. Rabbani, Thomas E. Reich, Hani M. El-Kaderi
DOI: 10.1039/C1PY00374G
Overcoming the PEG-addiction: well-defined alternatives to PEG, from structure–property relationships to better defined therapeutics
Robert Luxenhofer, Rudolf Zentel, María J. Vicent
DOI: 10.1039/C0PY00406E
Tunable absorption and emission wavelength in conjugated microporous polymers by copolymerization
Jessica Brandt, Johannes Schmidt, Arne Thomas, Jan Dirk Epping, Jens Weber
DOI: 10.1039/C1PY00217A
Stable azlactone-functionalized nanoparticles prepared from thermoresponsive copolymers synthesized by RAFT polymerization
Martin E. Levere, Hien The Ho, Sagrario Pascual, Laurent Fontaine
DOI: 10.1039/C1PY00320H
Development of thermosensitive copolymers of poly(2-methoxyethyl acrylate-co-poly(ethylene glycol) methyl ether acrylate) and their nanogels synthesized by RAFT dispersion polymerization in water
Guangyao Liu, Qian Qiu, Zesheng An
DOI: 10.1039/C2PY00533F
You might also like
What is 3-Fluoro-2-methylbenzylamine (CAS: 771573-36-5)?
3-Fluoro-2-methylbenzylamine is an organic compound with the CAS number 771573-3...
Is Tert-butyl 2-(oxetan-3-ylidene)acetate (CAS: 1207175-03-8) safe?
Tert-butyl 2-(oxetan-3-ylidene)acetate is considered safe for its intended uses ...
What precautions should be taken when handling 4-Acetyl-2-fluorobenzonitrile (CAS: 214760-18-6)?
Proper personal protective equipment (PPE) such as gloves, goggles, and a lab co...
How is 2-Ethyl-4-methyl-1,3-thiazole (CAS: 15679-12-6) typically synthesized?
2-Ethyl-4-methyl-1,3-thiazole is commonly synthesized via the reaction of thiour...
How should 5',5''-([2,2'-Bithiophene]-5,5'-diyl)bis(([1,1':3',1''-terphenyl]-4,4''-dicarboxylic acid)) (CAS: 1227780-71-3) be stored?
This compound should be stored in a cool, dry place away from direct sunlight an...
What regulatory guidelines apply to L-Lysine Acetate Salt (CAS: 52315-92-1)?
L-Lysine Acetate Salt (CAS: 52315-92-1) is subject to various regulatory guideli...
Is 6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) safe?
6-Fluoro-3-hydroxy-2-pyrazinecarboxamide (CAS: 259793-96-9) is generally conside...
What are the physical and chemical properties of 1,1'-Sulfonylbis(1H-imidazole) (CAS: 7189-69-7)?
1,1'-Sulfonylbis(1H-imidazole) is a crystalline solid with a molecular weight of...
What industries use 4-methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5)?
4-Methyl-7-nitro-1H-indole-3-carbonitrile (CAS: 289483-82-5) is primarily used i...
How should waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) be handled?
Waste containing 5-Bromo-3-indolyl-beta-galactoside (CAS: 97753-82-7) should be ...
Source Journal
Polymer Chemistry

Polymer Chemistry welcomes submissions in all areas of polymer science that have a strong focus on macromolecular chemistry. Manuscripts may cover a broad range of fields, yet no direct application focus is required.














![(2E)-4-[(1R,2S,8R,19S,21R)-14-Hydroxy-11-isopropenyl-8,23,23-trimethyl-5-(3-methyl-2-buten-1-yl)-16,20-dioxo-3,7,22-trioxaheptacyclo[17.4.1.1~8,12~.0~2,17~.0~2,21~.0~4,15~.0~6,13~]pentacosa-4(15),5,13
,17-tetraen-21-yl]-2-methyl-2-butenoic acid structure (2E)-4-[(1R,2S,8R,19S,21R)-14-Hydroxy-11-isopropenyl-8,23,23-trimethyl-5-(3-methyl-2-buten-1-yl)-16,20-dioxo-3,7,22-trioxaheptacyclo[17.4.1.1~8,12~.0~2,17~.0~2,21~.0~4,15~.0~6,13~]pentacosa-4(15),5,13
,17-tetraen-21-yl]-2-methyl-2-butenoic acid structure](https://static.chemtradehub.com/structs/173/173867-04-4-d2d3.webp)