Zobrazeno 1 - 10
of 395
pro vyhledávání: '"C. M. Roland"'
Local segmental relaxation properties of poly(methylmethacrylate) (PMMA) of varying molecular weight are measured by dielectric spectroscopy, and analyzed in combination the equation of state obtained from PVT measurements. The usual variation of gla
Externí odkaz:
http://arxiv.org/abs/cond-mat/0702112
Publikováno v:
The Journal of Physical Chemistry B. 124:5073-5078
A study of the dynamics of a series of biphenyl compounds having varying chlorine levels was carried out. Increasing the chlorine content increases the glass transition temperature and makes the dynamics substantially more sensitive to density change
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f756a17484e4b8a5b9bc68a88c076e2f
https://doi.org/10.1021/acs.jpcb.0c02601
https://doi.org/10.1021/acs.jpcb.0c02601
Autor:
Shinian Cheng, Małgorzata Musiał, Adam P. Holt, Eric Drockenmuller, Zaneta Wojnarowska, Marian Paluch, C. M. Roland
Publikováno v:
The Journal of Physical Chemistry. B
We examine the density scaling properties of two ionic materials, a classic aprotic low molecular weight ionic liquid, 1-butyl-3-methylimidazolium bis(perfluoroethylsulfonyl)imide ([BMIm][BETI]), and a polymeric ionic liquid, poly(3-methyl-1,2,3-tria
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdb56d576dd3eb84549c58b3b63b4d9a
http://europepmc.org/articles/PMC7497657
http://europepmc.org/articles/PMC7497657
Autor:
C. M. Roland, Adam P. Holt, James A. Wollmershauser, Daniel Fragiadakis, Boris N. Feigelson, Madhu Tyagi
Publikováno v:
Macromolecules. 52:4139-4144
The physical properties of a polycarbonate (PC) glass formed under high pressure are evaluated experimentally and compared to molecular dynamics simulations of a simple model polymer capable of pre...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9dbc8518253111e043ba5c7046a5a62c
https://doi.org/10.1021/acs.macromol.9b00603
https://doi.org/10.1021/acs.macromol.9b00603
Publikováno v:
Rubber Chemistry and Technology. 91:633-643
Two approaches to obtaining better dispersion of organo-modified nanoclay in high-molecular weight polybutadiene were assessed: (1) chemical modification of the polymer to increase its affinity for the silicate layers and (2) increasing the stretchin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9399f1d72a7bb19acacacd14d5e04b9
https://doi.org/10.5254/rct.18.81567
https://doi.org/10.5254/rct.18.81567
Publikováno v:
Macromolecules. 51:4694-4698
Dielectric spectra were measured for 1,4-polybutadiene (PBD) at various temperatures and pressures corresponding to a constant value of the relaxation time, τα, for the local segmental dynamics (α-process). Given the relationship of the Johari–G
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdbce5d988338b857d66eaece87a204b
https://doi.org/10.1021/acs.macromol.8b00664
https://doi.org/10.1021/acs.macromol.8b00664
Autor:
Adam P. Holt, C. M. Roland
Publikováno v:
Soft Matter. 14:8604-8611
The local segmental and secondary dynamics of tetramethylene oxide oligomer grafted to silica nanoparticles (NPs) were investigated as a function of grafting density and molecular weight. Grafting slows the segmental (α) dynamics, but gives rise to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbf0c8cc883d3c7d7b7312a1cd3b69aa
https://doi.org/10.1039/c8sm01443d
https://doi.org/10.1039/c8sm01443d
Publikováno v:
Rubber Chemistry and Technology. 90:381-386
Acoustic properties of an auxetic foam were measured to validate a previously proposed lower bound for Poisson's ratio, ν ≥ 1/5, inferred from classical two-parameter elasticity theory. This limit differs from the commonly reported lower limit of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::10a43bade092373308d123f8bc4b1c2c
https://doi.org/10.5254/rct.17.82682
https://doi.org/10.5254/rct.17.82682
Publikováno v:
Rubber Chemistry and Technology. 90:264-271
The dynamics of polypropylene glycol, both neat and attached to silica nanoparticles, were investigated using elastic neutron backscattering and dielectric spectroscopy. The mean square displacement measured by the former is suppressed by the particl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ba51704e397fe2a0ea26fba04afe36d
https://doi.org/10.5254/rct.17.82664
https://doi.org/10.5254/rct.17.82664
Publikováno v:
The Journal of chemical physics. 151(18)
The effects of pressure densification on 1,3,5-tri(1-naphthyl)benzene (TNB) are assessed from volumetric and calorimetric measurements. The pressure densified glass (PDG) has higher density than conventional glass (CG), but unlike ultrastable TNB gla
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11f8dd77d507c95b70c41fd4d4bb2ea9
https://pubmed.ncbi.nlm.nih.gov/31731837
https://pubmed.ncbi.nlm.nih.gov/31731837