FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2043926547> ?p ?o ?g. }

• W2043926547 endingPage "3861" @default.
• W2043926547 startingPage "3853" @default.
• W2043926547 abstract "The molecular dynamics of glass-forming poly(methyl phenyl siloxane) (PMPS) is studied by thermal (10−3–5 × 102 Hz), dielectric (10−3–109 Hz) and neutron (5 × 108–1012 Hz) spectroscopy. Because of the broad frequency range of 15 orders of magnitude the study provides a precise determination of glassy dynamics in a wide temperature range using different probes. The relaxation rates extracted from the different methods agree quantitatively in both their absolute values and in their temperature dependencies. A detailed analysis of the temperature dependence of the relaxation rate fp by a derivative technique shows that the α-relaxation of PMPS has to be characterized by a high and a low temperature branch separated by a crossover temperature TB = 250 K. In both temperature ranges the temperature dependence of fp has to be described by Vogel/Fulcher/Tammann laws with different Vogel temperatures. Also the analysis of the dielectric strength in its temperature dependence gives a crossover behavior from a low to a high temperature region with a similar value of TB. TB can be interpreted as onset of cooperative fluctuations and the formation of dynamical heterogeneities. The dependence of the relaxation rate on the scattering vector Q extracted from neutron scattering obeys a power law τ ∼ Q−Slope, where the power Slope varies between Slope = 2 and Slope = 3.5 with increasing temperature. This anomalous dependence of the relaxation time on the momentum transfer is discussed in terms of dynamic heterogeneities in the underlying motional processes even at temperatures above TB. Besides the segmental dynamics the fast Methyl group rotation is considered as well. The relaxation rates of this process have an activated temperature dependence with an activation energy of 8.3 kJ/mol. The data were discussed in the framework of the threefold jump model were the incoherent elastic scattering from ‘fixed’ atoms which are frozen on the time scale of the Methyl group rotation was taken into account." @default.
• W2043926547 created "2016-06-24" @default.
• W2043926547 creator A5000275099 @default.
• W2043926547 creator A5015395639 @default.
• W2043926547 creator A5020169045 @default.
• W2043926547 creator A5028778214 @default.
• W2043926547 creator A5039627589 @default.
• W2043926547 creator A5069624348 @default.
• W2043926547 date "2007-11-01" @default.
• W2043926547 modified "2023-09-25" @default.
• W2043926547 title "Molecular dynamics in glass-forming poly(phenyl methyl siloxane) as investigated by broadband thermal, dielectric and neutron spectroscopy" @default.
• W2043926547 cites W1646671735 @default.
• W2043926547 cites W1944915281 @default.
• W2043926547 cites W1974150790 @default.
• W2043926547 cites W1974956983 @default.
• W2043926547 cites W1975967306 @default.
• W2043926547 cites W1979484963 @default.
• W2043926547 cites W1982411540 @default.
• W2043926547 cites W1984697395 @default.
• W2043926547 cites W1990140100 @default.
• W2043926547 cites W1993826366 @default.
• W2043926547 cites W1997796256 @default.
• W2043926547 cites W1999183541 @default.
• W2043926547 cites W2002040252 @default.
• W2043926547 cites W2005181542 @default.
• W2043926547 cites W2017771574 @default.
• W2043926547 cites W2021641921 @default.
• W2043926547 cites W2022391397 @default.
• W2043926547 cites W2027628945 @default.
• W2043926547 cites W2029197557 @default.
• W2043926547 cites W2033843645 @default.
• W2043926547 cites W2034403339 @default.
• W2043926547 cites W2035162525 @default.
• W2043926547 cites W2042149657 @default.
• W2043926547 cites W2048421180 @default.
• W2043926547 cites W2050945279 @default.
• W2043926547 cites W2054741222 @default.
• W2043926547 cites W2055513939 @default.
• W2043926547 cites W2056879402 @default.
• W2043926547 cites W2058534458 @default.
• W2043926547 cites W2064339335 @default.
• W2043926547 cites W2065453332 @default.
• W2043926547 cites W2065621993 @default.
• W2043926547 cites W2074643521 @default.
• W2043926547 cites W2075688865 @default.
• W2043926547 cites W2085533084 @default.
• W2043926547 cites W2088654232 @default.
• W2043926547 cites W2090627946 @default.
• W2043926547 cites W2091119112 @default.
• W2043926547 cites W212839194 @default.
• W2043926547 cites W2153067618 @default.
• W2043926547 cites W2162053762 @default.
• W2043926547 cites W2166849775 @default.
• W2043926547 cites W2170797104 @default.
• W2043926547 cites W4250258570 @default.
• W2043926547 cites W4250448744 @default.
• W2043926547 cites W4254092786 @default.
• W2043926547 cites W4256297049 @default.
• W2043926547 cites W4375188382 @default.
• W2043926547 cites W4382891128 @default.
• W2043926547 doi "https://doi.org/10.1016/j.jnoncrysol.2007.03.025" @default.
• W2043926547 hasPublicationYear "2007" @default.
• W2043926547 type Work @default.
• W2043926547 sameAs 2043926547 @default.
• W2043926547 citedByCount "34" @default.
• W2043926547 countsByYear W20439265472012 @default.
• W2043926547 countsByYear W20439265472013 @default.
• W2043926547 countsByYear W20439265472014 @default.
• W2043926547 countsByYear W20439265472015 @default.
• W2043926547 countsByYear W20439265472016 @default.
• W2043926547 countsByYear W20439265472017 @default.
• W2043926547 countsByYear W20439265472020 @default.
• W2043926547 countsByYear W20439265472021 @default.
• W2043926547 countsByYear W20439265472022 @default.
• W2043926547 countsByYear W20439265472023 @default.
• W2043926547 crossrefType "journal-article" @default.
• W2043926547 hasAuthorship W2043926547A5000275099 @default.
• W2043926547 hasAuthorship W2043926547A5015395639 @default.
• W2043926547 hasAuthorship W2043926547A5020169045 @default.
• W2043926547 hasAuthorship W2043926547A5028778214 @default.
• W2043926547 hasAuthorship W2043926547A5039627589 @default.
• W2043926547 hasAuthorship W2043926547A5069624348 @default.
• W2043926547 hasConcept C104015590 @default.
• W2043926547 hasConcept C105795698 @default.
• W2043926547 hasConcept C116306529 @default.
• W2043926547 hasConcept C120665830 @default.
• W2043926547 hasConcept C121332964 @default.
• W2043926547 hasConcept C122865956 @default.
• W2043926547 hasConcept C133386390 @default.
• W2043926547 hasConcept C147789679 @default.
• W2043926547 hasConcept C15744967 @default.
• W2043926547 hasConcept C159985019 @default.
• W2043926547 hasConcept C17525397 @default.
• W2043926547 hasConcept C185592680 @default.
• W2043926547 hasConcept C191486275 @default.
• W2043926547 hasConcept C192562407 @default.
• W2043926547 hasConcept C26873012 @default.
• W2043926547 hasConcept C2776029896 @default.

• next