Matches in SemOpenAlex for { <https://semopenalex.org/work/W2042438931> ?p ?o ?g. }
Showing items 1 to 95 of
95
with 100 items per page.
- W2042438931 endingPage "252" @default.
- W2042438931 startingPage "247" @default.
- W2042438931 abstract "A kinetic study of the anionic polymerization of hexamethylcyclotrisiloxane ((CH3)2SiO)3 (D3) was carried out in toluene with the cryptate Li+ + [211] as a counterion. The kinetic order with respect to the living end concentration was found to be equal to 1, and the propagation rate constant relative to cryptated ion pairs was determined at several temperatures between −20 and +20°C. The corresponding activation parameters were calculated : Ep = 9.8 kcal.mol−1 and Δ S°t = −20 cal.mol.−1K−1. The reaction of 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetra-siloxane ((CH3)(CH2=CH)SiO)4 (D4*) was studied under the same conditions, the reactivity towards silanolate active centers was shown to be very close to that of D3. The rate constants of propagation and depropagation of D4* and of larger cycles D5* and D6* were determined from polymerization experiments on D4*. The propagation rate constants were found to be nearly the same for D4* and D5* : 1.2–1.31.mol−1. s−1, D6* being the less reactive monomer : 0.41.mol−1. s−1. The differences observed in equilibrium constants of the cycles are essentially due to the rate constants of their formation which were found to be 0.42, 0.23, and 0.006 s−1 for D4*, D5* and D6*, respectively." @default.
- W2042438931 created "2016-06-24" @default.
- W2042438931 creator A5012569591 @default.
- W2042438931 creator A5018636124 @default.
- W2042438931 creator A5043538101 @default.
- W2042438931 date "1986-12-01" @default.
- W2042438931 modified "2023-09-27" @default.
- W2042438931 title "Anionic polymerization of cyclosiloxanes with cryptates as counterions: New results" @default.
- W2042438931 cites W1501184621 @default.
- W2042438931 cites W1968460206 @default.
- W2042438931 cites W1986503905 @default.
- W2042438931 cites W1990351127 @default.
- W2042438931 cites W2045351462 @default.
- W2042438931 cites W2500867547 @default.
- W2042438931 doi "https://doi.org/10.1002/masy.19860060123" @default.
- W2042438931 hasPublicationYear "1986" @default.
- W2042438931 type Work @default.
- W2042438931 sameAs 2042438931 @default.
- W2042438931 citedByCount "20" @default.
- W2042438931 countsByYear W20424389312012 @default.
- W2042438931 countsByYear W20424389312015 @default.
- W2042438931 countsByYear W20424389312016 @default.
- W2042438931 countsByYear W20424389312021 @default.
- W2042438931 countsByYear W20424389312022 @default.
- W2042438931 crossrefType "journal-article" @default.
- W2042438931 hasAuthorship W2042438931A5012569591 @default.
- W2042438931 hasAuthorship W2042438931A5018636124 @default.
- W2042438931 hasAuthorship W2042438931A5043538101 @default.
- W2042438931 hasConcept C10710636 @default.
- W2042438931 hasConcept C121332964 @default.
- W2042438931 hasConcept C135889238 @default.
- W2042438931 hasConcept C142724271 @default.
- W2042438931 hasConcept C145148216 @default.
- W2042438931 hasConcept C147789679 @default.
- W2042438931 hasConcept C148898269 @default.
- W2042438931 hasConcept C161790260 @default.
- W2042438931 hasConcept C166940927 @default.
- W2042438931 hasConcept C175113610 @default.
- W2042438931 hasConcept C178790620 @default.
- W2042438931 hasConcept C185592680 @default.
- W2042438931 hasConcept C188027245 @default.
- W2042438931 hasConcept C204787440 @default.
- W2042438931 hasConcept C2776139660 @default.
- W2042438931 hasConcept C2776910235 @default.
- W2042438931 hasConcept C2778142098 @default.
- W2042438931 hasConcept C34814092 @default.
- W2042438931 hasConcept C44228677 @default.
- W2042438931 hasConcept C521977710 @default.
- W2042438931 hasConcept C62520636 @default.
- W2042438931 hasConcept C71924100 @default.
- W2042438931 hasConcept C93391505 @default.
- W2042438931 hasConceptScore W2042438931C10710636 @default.
- W2042438931 hasConceptScore W2042438931C121332964 @default.
- W2042438931 hasConceptScore W2042438931C135889238 @default.
- W2042438931 hasConceptScore W2042438931C142724271 @default.
- W2042438931 hasConceptScore W2042438931C145148216 @default.
- W2042438931 hasConceptScore W2042438931C147789679 @default.
- W2042438931 hasConceptScore W2042438931C148898269 @default.
- W2042438931 hasConceptScore W2042438931C161790260 @default.
- W2042438931 hasConceptScore W2042438931C166940927 @default.
- W2042438931 hasConceptScore W2042438931C175113610 @default.
- W2042438931 hasConceptScore W2042438931C178790620 @default.
- W2042438931 hasConceptScore W2042438931C185592680 @default.
- W2042438931 hasConceptScore W2042438931C188027245 @default.
- W2042438931 hasConceptScore W2042438931C204787440 @default.
- W2042438931 hasConceptScore W2042438931C2776139660 @default.
- W2042438931 hasConceptScore W2042438931C2776910235 @default.
- W2042438931 hasConceptScore W2042438931C2778142098 @default.
- W2042438931 hasConceptScore W2042438931C34814092 @default.
- W2042438931 hasConceptScore W2042438931C44228677 @default.
- W2042438931 hasConceptScore W2042438931C521977710 @default.
- W2042438931 hasConceptScore W2042438931C62520636 @default.
- W2042438931 hasConceptScore W2042438931C71924100 @default.
- W2042438931 hasConceptScore W2042438931C93391505 @default.
- W2042438931 hasIssue "1" @default.
- W2042438931 hasLocation W20424389311 @default.
- W2042438931 hasOpenAccess W2042438931 @default.
- W2042438931 hasPrimaryLocation W20424389311 @default.
- W2042438931 hasRelatedWork W1964687069 @default.
- W2042438931 hasRelatedWork W1989280951 @default.
- W2042438931 hasRelatedWork W2015321541 @default.
- W2042438931 hasRelatedWork W2036129335 @default.
- W2042438931 hasRelatedWork W2042438931 @default.
- W2042438931 hasRelatedWork W2354653259 @default.
- W2042438931 hasRelatedWork W2624890242 @default.
- W2042438931 hasRelatedWork W4232459072 @default.
- W2042438931 hasRelatedWork W4235237686 @default.
- W2042438931 hasRelatedWork W908385248 @default.
- W2042438931 hasVolume "6" @default.
- W2042438931 isParatext "false" @default.
- W2042438931 isRetracted "false" @default.
- W2042438931 magId "2042438931" @default.
- W2042438931 workType "article" @default.