2006
DOI: 10.1016/j.tca.2005.11.009
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Thermodynamic properties of carbosilane dendrimers of the third to the sixth generations with terminal butyl groups in the range from T→0 to 600K

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Cited by 42 publications
(33 citation statements)
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“…This scenario can account for the two glasslike transitions as predicted from simulations in the larger size model 28 and as verified from recent experiments. 26 Approximate values for the glass transition temperatures ͑T g ͒ of the examined models as detected in R2 are K and T g L ͑G5͒Ӎ450 K, where T g H and T g L refer to the "high" and the "low" temperature T g 's of the largest generation system.…”
Section: Non-gaussianity and Local Relaxationmentioning
confidence: 99%
See 1 more Smart Citation
“…This scenario can account for the two glasslike transitions as predicted from simulations in the larger size model 28 and as verified from recent experiments. 26 Approximate values for the glass transition temperatures ͑T g ͒ of the examined models as detected in R2 are K and T g L ͑G5͒Ӎ450 K, where T g H and T g L refer to the "high" and the "low" temperature T g 's of the largest generation system.…”
Section: Non-gaussianity and Local Relaxationmentioning
confidence: 99%
“…6,16,24 In this work we aim at a closer view on those mechanisms governing local polymer motion under a dense connectivity pattern and a well defined mobility contrast, by examining polymeric models bearing the dendritic topology. Dendrimers are glass-forming polymeric materials [25][26][27][28] with a quantitatively described level of dynamic heterogeneity well localized within their structure. [27][28][29][30][31] These attributes may essentially "filter out" certain dynamic features met either in liquids or linear polymers allowing a better assessment of the relative importance of each factor.…”
Section: Introductionmentioning
confidence: 99%
“…1- 11 Since the first reports on the synthesis of carbosilane dendrimers have been pub lished, 6,7 they were used, along with other compounds with dendrite organization of the molecular structure, as objects for the determination of the thermodynamic char acteristics. [12][13][14][15][16][17][18][19] In particular, methods of precision calo rimetry were used to study the low temperature depen dence of the heat capacity in a wide temperature range, and the experimental values were used in calculating the thermodynamic functions in the temperature range from T → 0 to 340-600 K.…”
mentioning
confidence: 99%
“…We have earlier 19 obtained the standard thermody namic functions of the carbosilane dendrimers of the third-sixth generations with the terminal butyl groups in the range from T → 0 to 340-600 K and determined and analyzed changes in these functions depending on the composition and structure of compounds. The systematic studies of the temperature dependence of the heat capac ity of the dendrimers revealed the second relaxation tran sition, which is an important principal result.…”
mentioning
confidence: 99%
“…Smirnova in the Institute of Chemistry of University of N. Novgorod). 33,34 It is important that the appearance of the second transition coincides with the change of the physical state of a dendrimer samples. If till the fifth generation they are viscous transparent liquids, starting from the sixth one they behave as wax-like substances.…”
Section: Carbosilane Dendrimersmentioning
confidence: 99%