Matches in SemOpenAlex for { <https://semopenalex.org/work/W2045302525> ?p ?o ?g. }
Showing items 1 to 92 of
92
with 100 items per page.
- W2045302525 endingPage "1965" @default.
- W2045302525 startingPage "1959" @default.
- W2045302525 abstract "The polymerization of isobutylene (IB) to yield highly reactive polyisobutylene (HR PIB) with high exo-olefin content using GaCl3 or FeCl3·diisopropyl ether complexes has been previously reported.1 In an effort to further improve polymerization rates and exo-olefin content, we have studied ethylaluminum dichloride (EADC) complexes with diisopropyl ether, 2-chloroethyl ethyl ether (CEEE), and bis(2-chloroethyl) ether (CEE) as catalysts in conjunction with tert-butyl chloride as initiator in hexanes at different temperatures. All three complexes were readily soluble in hexanes. Polymerization, however, was only observed with CEE. At 0 °C polymerization was complete in 5 min at [t-BuCl] = [EADC·CEE] = 10 mM and resulted in PIB with ∼70% exo-olefin content. Studies on complexation using ATR FTIR and 1H NMR spectroscopy revealed that at 1:1 stoichiometry a small amount of EADC remains uncomplexed. By employing an excess of CEE, exo-olefin contents increased up to 90%, while polymerization rates decreased only slightly. With decreasing temperature, polymerization rates decreased while molecular weights as well as exo-olefin contents increased, suggesting that isomerization has a higher activation energy than β-proton abstraction. Density functional theory (DFT) studies on the Lewis acid·ether binding energies indicated a trend consistent with the polymerization results. The polymerization mechanism proposed previously for Lewis acid·ether complexes1 adequately explains all the findings." @default.
- W2045302525 created "2016-06-24" @default.
- W2045302525 creator A5029824851 @default.
- W2045302525 creator A5030194599 @default.
- W2045302525 creator A5033204973 @default.
- W2045302525 creator A5052366543 @default.
- W2045302525 creator A5074334575 @default.
- W2045302525 date "2014-03-10" @default.
- W2045302525 modified "2023-10-17" @default.
- W2045302525 title "Synthesis of Highly Reactive Polyisobutylene Catalyzed by EtAlCl<sub>2</sub>/Bis(2-chloroethyl) Ether Soluble Complex in Hexanes" @default.
- W2045302525 cites W1994228918 @default.
- W2045302525 cites W2004220624 @default.
- W2045302525 cites W2007621666 @default.
- W2045302525 cites W2023271753 @default.
- W2045302525 cites W2027749384 @default.
- W2045302525 cites W2046412723 @default.
- W2045302525 cites W2058363175 @default.
- W2045302525 cites W2065643452 @default.
- W2045302525 cites W2090619601 @default.
- W2045302525 cites W2094642658 @default.
- W2045302525 cites W2094791548 @default.
- W2045302525 cites W2119813990 @default.
- W2045302525 cites W2143981217 @default.
- W2045302525 cites W2328503417 @default.
- W2045302525 doi "https://doi.org/10.1021/ma500042f" @default.
- W2045302525 hasPublicationYear "2014" @default.
- W2045302525 type Work @default.
- W2045302525 sameAs 2045302525 @default.
- W2045302525 citedByCount "42" @default.
- W2045302525 countsByYear W20453025252014 @default.
- W2045302525 countsByYear W20453025252015 @default.
- W2045302525 countsByYear W20453025252016 @default.
- W2045302525 countsByYear W20453025252017 @default.
- W2045302525 countsByYear W20453025252018 @default.
- W2045302525 countsByYear W20453025252019 @default.
- W2045302525 countsByYear W20453025252020 @default.
- W2045302525 countsByYear W20453025252021 @default.
- W2045302525 countsByYear W20453025252022 @default.
- W2045302525 countsByYear W20453025252023 @default.
- W2045302525 crossrefType "journal-article" @default.
- W2045302525 hasAuthorship W2045302525A5029824851 @default.
- W2045302525 hasAuthorship W2045302525A5030194599 @default.
- W2045302525 hasAuthorship W2045302525A5033204973 @default.
- W2045302525 hasAuthorship W2045302525A5052366543 @default.
- W2045302525 hasAuthorship W2045302525A5074334575 @default.
- W2045302525 hasConcept C15920480 @default.
- W2045302525 hasConcept C161790260 @default.
- W2045302525 hasConcept C163638829 @default.
- W2045302525 hasConcept C178790620 @default.
- W2045302525 hasConcept C183882617 @default.
- W2045302525 hasConcept C185592680 @default.
- W2045302525 hasConcept C188027245 @default.
- W2045302525 hasConcept C2776906966 @default.
- W2045302525 hasConcept C2780407432 @default.
- W2045302525 hasConcept C2781126881 @default.
- W2045302525 hasConcept C44228677 @default.
- W2045302525 hasConcept C51886252 @default.
- W2045302525 hasConcept C521977710 @default.
- W2045302525 hasConceptScore W2045302525C15920480 @default.
- W2045302525 hasConceptScore W2045302525C161790260 @default.
- W2045302525 hasConceptScore W2045302525C163638829 @default.
- W2045302525 hasConceptScore W2045302525C178790620 @default.
- W2045302525 hasConceptScore W2045302525C183882617 @default.
- W2045302525 hasConceptScore W2045302525C185592680 @default.
- W2045302525 hasConceptScore W2045302525C188027245 @default.
- W2045302525 hasConceptScore W2045302525C2776906966 @default.
- W2045302525 hasConceptScore W2045302525C2780407432 @default.
- W2045302525 hasConceptScore W2045302525C2781126881 @default.
- W2045302525 hasConceptScore W2045302525C44228677 @default.
- W2045302525 hasConceptScore W2045302525C51886252 @default.
- W2045302525 hasConceptScore W2045302525C521977710 @default.
- W2045302525 hasIssue "6" @default.
- W2045302525 hasLocation W20453025251 @default.
- W2045302525 hasOpenAccess W2045302525 @default.
- W2045302525 hasPrimaryLocation W20453025251 @default.
- W2045302525 hasRelatedWork W2006879118 @default.
- W2045302525 hasRelatedWork W2025897866 @default.
- W2045302525 hasRelatedWork W2044560118 @default.
- W2045302525 hasRelatedWork W2094247302 @default.
- W2045302525 hasRelatedWork W2261059244 @default.
- W2045302525 hasRelatedWork W2473899602 @default.
- W2045302525 hasRelatedWork W2606028719 @default.
- W2045302525 hasRelatedWork W2951716843 @default.
- W2045302525 hasRelatedWork W4205701224 @default.
- W2045302525 hasRelatedWork W4238934032 @default.
- W2045302525 hasVolume "47" @default.
- W2045302525 isParatext "false" @default.
- W2045302525 isRetracted "false" @default.
- W2045302525 magId "2045302525" @default.
- W2045302525 workType "article" @default.