FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2007030400> ?p ?o ?g. }

• W2007030400 endingPage "2551" @default.
• W2007030400 startingPage "2542" @default.
• W2007030400 abstract "Photolytically generated radicals (at a wavelength of 351 nm) derived from the acetophenone-type photoinitiators benzoin (2-hydroxy-1,2-diphenylethanone) and 2,4,6-trimethylbenzoin (2-hydroxy-1-mesityl-2-phenylethanone, TMB) (specifically the benzoyl and mesitoyl radical) are quantified in their ability to serve as initiating species in methyl methacrylate (MMA), ethyl methacrylate (EMA), and butyl methacrylate (BMA) bulk free radical polymerizations under optimized conditions. Herein, 2,4,6-trimethylbenzoin is employed for the first time as photoinitiator in pulsed laser polymerizations (PLP) employing a high-frequency excimer laser, constituting a new source for mesitoyl radicals. The current work presents an improved method for quantifying radical efficiency of photoinitiation processes using coupled online size exclusion chromatography−electrospray ionization mass spectrometry (SEC/ESI-MS) to analyze the obtained polymers. Because of the occurrence of side reactions during the benzoin-initiated MMA polymerization, reduced laser energies (∼0.35 mJ/pulse) as well as low polymerization temperatures (∼−5 °C) were employed, which avoids side product formation. A plot of the ratio of benzoyl to mesitoyl (derived from 2,4,6-trimethylbenzoin) end groups vs the ratio of both initiators in the reaction mixture indicates that the benzoin-derived benzoyl radical is 3.0 (2.6, 2.4) times more likely to initiate the polymerization process of MMA (EMA, BMA) than the TMB-derived mesitoyl fragment. This observation is in sharp contrast to the case when mesitil is employed as a source of mesitoyl radicals (8.6 times higher likelihood of benzoyl incorporation). These results clearly support the notion that the origin of a radical species significantly determines its propensity to be incorporated at a polymer chain’s terminus. The cause of such an origin dependence is tentatively assigned—at least in part—to different triplet lifetimes or intersystem crossing efficiencies (ΦISC) or both of TMB and mesitil." @default.
• W2007030400 created "2016-06-24" @default.
• W2007030400 creator A5004482996 @default.
• W2007030400 creator A5031316070 @default.
• W2007030400 creator A5066540462 @default.
• W2007030400 date "2011-03-30" @default.
• W2007030400 modified "2023-10-10" @default.
• W2007030400 title "Quantitative Comparison of the Mesitoyl vs the Benzoyl Fragment in Photoinitiation: A Question of Origin" @default.
• W2007030400 cites W126146646 @default.
• W2007030400 cites W1544218798 @default.
• W2007030400 cites W1549034645 @default.
• W2007030400 cites W1866051727 @default.
• W2007030400 cites W1964240606 @default.
• W2007030400 cites W1976430333 @default.
• W2007030400 cites W1984255284 @default.
• W2007030400 cites W1989859408 @default.
• W2007030400 cites W2010048770 @default.
• W2007030400 cites W2012528195 @default.
• W2007030400 cites W2024649205 @default.
• W2007030400 cites W2025899873 @default.
• W2007030400 cites W2039593539 @default.
• W2007030400 cites W2042114914 @default.
• W2007030400 cites W2047033248 @default.
• W2007030400 cites W2048896155 @default.
• W2007030400 cites W2061049625 @default.
• W2007030400 cites W2061619909 @default.
• W2007030400 cites W2068004118 @default.
• W2007030400 cites W2069206351 @default.
• W2007030400 cites W2070216154 @default.
• W2007030400 cites W2078710030 @default.
• W2007030400 cites W2080955762 @default.
• W2007030400 cites W2088249405 @default.
• W2007030400 cites W2091806019 @default.
• W2007030400 cites W2119653752 @default.
• W2007030400 cites W2135033465 @default.
• W2007030400 cites W2144763710 @default.
• W2007030400 cites W2318172245 @default.
• W2007030400 cites W2321324775 @default.
• W2007030400 cites W2328229068 @default.
• W2007030400 cites W2331995761 @default.
• W2007030400 cites W2571334796 @default.
• W2007030400 cites W2916748266 @default.
• W2007030400 cites W4211095187 @default.
• W2007030400 cites W4238734590 @default.
• W2007030400 cites W4256667536 @default.
• W2007030400 doi "https://doi.org/10.1021/ma2001977" @default.
• W2007030400 hasPublicationYear "2011" @default.
• W2007030400 type Work @default.
• W2007030400 sameAs 2007030400 @default.
• W2007030400 citedByCount "24" @default.
• W2007030400 countsByYear W20070304002012 @default.
• W2007030400 countsByYear W20070304002013 @default.
• W2007030400 countsByYear W20070304002014 @default.
• W2007030400 countsByYear W20070304002015 @default.
• W2007030400 countsByYear W20070304002016 @default.
• W2007030400 countsByYear W20070304002017 @default.
• W2007030400 countsByYear W20070304002018 @default.
• W2007030400 countsByYear W20070304002019 @default.
• W2007030400 countsByYear W20070304002020 @default.
• W2007030400 countsByYear W20070304002021 @default.
• W2007030400 crossrefType "journal-article" @default.
• W2007030400 hasAuthorship W2007030400A5004482996 @default.
• W2007030400 hasAuthorship W2007030400A5031316070 @default.
• W2007030400 hasAuthorship W2007030400A5066540462 @default.
• W2007030400 hasConcept C111998727 @default.
• W2007030400 hasConcept C139066938 @default.
• W2007030400 hasConcept C162356407 @default.
• W2007030400 hasConcept C166940927 @default.
• W2007030400 hasConcept C178790620 @default.
• W2007030400 hasConcept C185592680 @default.
• W2007030400 hasConcept C188027245 @default.
• W2007030400 hasConcept C2777230457 @default.
• W2007030400 hasConcept C2777935641 @default.
• W2007030400 hasConcept C2780634384 @default.
• W2007030400 hasConcept C43617362 @default.
• W2007030400 hasConcept C44228677 @default.
• W2007030400 hasConcept C521977710 @default.
• W2007030400 hasConcept C75473681 @default.
• W2007030400 hasConceptScore W2007030400C111998727 @default.
• W2007030400 hasConceptScore W2007030400C139066938 @default.
• W2007030400 hasConceptScore W2007030400C162356407 @default.
• W2007030400 hasConceptScore W2007030400C166940927 @default.
• W2007030400 hasConceptScore W2007030400C178790620 @default.
• W2007030400 hasConceptScore W2007030400C185592680 @default.
• W2007030400 hasConceptScore W2007030400C188027245 @default.
• W2007030400 hasConceptScore W2007030400C2777230457 @default.
• W2007030400 hasConceptScore W2007030400C2777935641 @default.
• W2007030400 hasConceptScore W2007030400C2780634384 @default.
• W2007030400 hasConceptScore W2007030400C43617362 @default.
• W2007030400 hasConceptScore W2007030400C44228677 @default.
• W2007030400 hasConceptScore W2007030400C521977710 @default.
• W2007030400 hasConceptScore W2007030400C75473681 @default.
• W2007030400 hasIssue "8" @default.
• W2007030400 hasLocation W20070304001 @default.
• W2007030400 hasOpenAccess W2007030400 @default.
• W2007030400 hasPrimaryLocation W20070304001 @default.
• W2007030400 hasRelatedWork W1998250817 @default.
• W2007030400 hasRelatedWork W2058353197 @default.

• next