Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Thor L. Smith"'
Autor:
Thor L. Smith
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 46:97-114
The equilibrium shear modulus G of network polymers increases rapidly with the chain concentration ν when ν ≳ 10−3 mol/cm3. This behavior is accounted for by the equation G=ΦnνRTΓ(1/λm) where Φn(=rt2/r00) may depend on n, the mean number o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79058e3a633e26c3dc72038dd7e3e474
https://doi.org/10.1002/polc.5070460109
https://doi.org/10.1002/polc.5070460109
Autor:
Thor L. Smith
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 35:39-50
Several equations containing two empirical constants are considered for representing G(t), G′(ω), J′(ω), and J(t) in the glass-to-rubber dispersion zone. With these equations, data on the NBS polyisobutylene can be closely represented. The rela
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f380205cecd598b5ecd318d96d961a8c
https://doi.org/10.1002/polc.5070350105
https://doi.org/10.1002/polc.5070350105
Autor:
Thor L. Smith
Publikováno v:
Journal of Polymer Science Part C: Polymer Symposia. 32:269-282
Macroscopic fracture is preceded by localized deformation and rupture processes that depend on the state of combined stress (i.e., on the stress state) and other test conditions as well as on polymer structure and morphology. To illustrate the effect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39116e64824fc8525422ce59db844e31
https://doi.org/10.1002/polc.5070320114
https://doi.org/10.1002/polc.5070320114
Autor:
Thor L. Smith, B. Haidar
Publikováno v:
Polymer. 32:2594-2600
The yield force (or stress) of polycarbonate in simple extension was studied to determine its dependence on deformation history, including the stretching rate, and temperature. At different temperatures, the stretching of a specimen at a constant rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffec967d34fcbbc8cd59bf14281aea94
https://doi.org/10.1016/0032-3861(91)90339-k
https://doi.org/10.1016/0032-3861(91)90339-k
Autor:
Thor L. Smith, Churl S. Kim
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 28:2119-2126
A novel method has been developed and tested to determine accurately the linear coefficient of thermal expansion α of flexible films without subjecting a specimen to a tensile load continuously during the measurement of expansion data. Other methods
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e16de94194a72c063345398a6122c831
https://doi.org/10.1002/polb.1990.090281116
https://doi.org/10.1002/polb.1990.090281116
Autor:
B. Haidar, Thor L. Smith
Publikováno v:
Polymer. 31:1904-1908
Well annealed specimens of polycarbonate film were first subjected rapidly to a static elongation of 2.6% at 13 temperatures from −110 to 110°C. During stress relaxation at each temperature, the static strain was modulated with a sinusoidal tensil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::942e132cd147d9cfe9e893df87a029a1
https://doi.org/10.1016/0032-3861(90)90015-q
https://doi.org/10.1016/0032-3861(90)90015-q
Publikováno v:
Rubber Chemistry and Technology. 63:256-264
For three series of bimodal networks, the stress-relaxation rates and the tearing energies were shown to exhibit maxima at about the same concentrations of short chains as those at which the tensile strengths, reported earlier, also exhibit maxima. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be6d25e1a623b7906b5815da8494261d
https://doi.org/10.5254/1.3538256
https://doi.org/10.5254/1.3538256
Autor:
Thor L. Smith, T. Ricco
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 28:513-520
A study was made of the physical aging of an annealed polycarbonate film at a constant extension of 2.6% at 5 temperatures from 30 to 110°C. During stress relaxation at the constant extension, the storage modulus in tension, E′, was determined by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e560ed2ca57a69c9a6d9a8fca921e7ff
https://doi.org/10.1002/polb.1990.090280406
https://doi.org/10.1002/polb.1990.090280406
Autor:
Bassel Haidar, Thor L. Smith
Publikováno v:
Macromolecules. 23:3710-3712
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2abcc34958ffacc39c48c09d000d4872
https://doi.org/10.1021/ma00217a029
https://doi.org/10.1021/ma00217a029
Autor:
Churl S. Kim, Thor L. Smith
Publikováno v:
MRS Proceedings. 227
Studies were made of the physical properties of the commercially available polyimide Upilex-SGA, which is prepared from biphenyl dianhydride and p-phenylene diamine. Annealing the Upilex-SGA for 2 hr Linder N2 at 400°C gave a film that expanded cont
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99ecab36968b634eb177cf252b41b5f3
https://doi.org/10.1557/proc-227-219
https://doi.org/10.1557/proc-227-219