Zobrazeno 1 - 10
of 60
pro vyhledávání: '"R. R. Lagasse"'
Publikováno v:
Journal of Applied Physics. 91:5962-5971
We report breakdown strengths in a void-filled dielectric material, epoxy containing 48 vol % hollow glass microballoon filler, which is stressed with unipolar voltage pulses of the order of 10 μs duration. The microballoon voids had mean diameters
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b7044ee95a3d37db7ac901f100fb8dc
https://doi.org/10.1063/1.1461058
https://doi.org/10.1063/1.1461058
Publikováno v:
Journal of Applied Physics. 91:3205-3212
Dielectric potting materials (encapsulants) are used to prevent air breakdown in high-voltage electrical devices. We report breakdown strengths in void-filled encapsulants, stressed with unipolar voltage pulses of the order of 10 μs duration. High s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a0f022f62dc3480319a3b79f2c56c3d5
https://doi.org/10.1063/1.1445284
https://doi.org/10.1063/1.1445284
Autor:
Gregory Beaucage, Dale W. Schaefer, P. Erlich, Paul D. Whaley, T. P. Rieker, S. Kulkarni, J. H. Aubert, R. R. Lagasse, R. S. Stein
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 34:3063-3072
Semicrystalline polymers gelled from thermally quenched semidilute solutions can, in some cases, be supercritically dried to produce nano-structured foams of exceedingly high specific surface area. This article investigates the nano-morphology of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f2c7cad90b7f8f2beefcd094f1ba733
https://doi.org/10.1002/(sici)1099-0488(199612)34:17<3063::aid-polb18>3.0.co
https://doi.org/10.1002/(sici)1099-0488(199612)34:17<3063::aid-polb18>3.0.co
Publikováno v:
Macromolecules. 29:8615-8621
Absolute-intensity, small-angle X-ray scattering is used to investigate the pore structure of a carbon foam and its corresponding poly(acrylonitrile) foam precursor, both having a concentric band structure of unusually large spacing. The poly(acrylon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::524d3283a493ea4f8280da7dde065283
https://doi.org/10.1021/ma9508111
https://doi.org/10.1021/ma9508111
Publikováno v:
Journal of Electronic Packaging. 117:249-254
Electrical component assemblies are encapsulated to provide delicate parts with voltage isolation and protection against damage. The stresses generated by cure shrinkage, although typically smaller than the thermal residual stresses produced by cooli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af3eb90d2042033de77f12e92ef5c1b1
https://doi.org/10.1115/1.2792101
https://doi.org/10.1115/1.2792101
Publikováno v:
MRS Proceedings. 225
We have developed a numerical model for calculating stresses generated during cure of shrinking encapsulating resins. Mechanical modeling of polymer encapsulated electronic devices usually focusses on stress generated during cooling after cure. The s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::172f43c4b032347c9325a722a9fc8769
https://doi.org/10.1557/proc-225-177
https://doi.org/10.1557/proc-225-177
Publikováno v:
Physical Review Letters. 48:1274-1277
It is shown that the crystallinity of poled films of poly(vinylidene fluoride) can be changed by the application of an electric field. This is the first time that electric-field-induced changes of crystallinity in a polymer have been reported, and th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ddbdd0b69ec8e109803770b61e7c9efa
https://doi.org/10.1103/physrevlett.48.1274
https://doi.org/10.1103/physrevlett.48.1274
Publikováno v:
Ferroelectrics. 57:151-158
As a result of a series of experiments designed to determine the magnitude of the primary and secondary contributions to the pyroelectric coefficient in polyvinylidene fluoride, we have concluded that those contributions cannot account for the magnit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea5ff147f68a5da257522ba98ee3e886
https://doi.org/10.1080/00150198408012759
https://doi.org/10.1080/00150198408012759
Publikováno v:
Journal of Applied Physics. 52:5892-5897
Many physical properties of polymer glasses change spontaneously during isothermal aging by a process commonly modeled as collapse of free volume. The model has not been verified rigorously because free volume cannot be unambiguously measured. In the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e20a5d9f3f9da5097141eed44b2ab1b
https://doi.org/10.1063/1.329826
https://doi.org/10.1063/1.329826
Autor:
R. R. Lagasse, Bryce Maxwell
Publikováno v:
Polymer Engineering and Science. 16:189-199
Some principles of rheology are applied to the study of the shear-induced crystallization of molten polymers. A new technique is described for measuring crystallization kinetics during isothermal flow at constant shear rate in a parallel plate rheome
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64182589b7703e9cd0137a62a43a7237
https://doi.org/10.1002/pen.760160312
https://doi.org/10.1002/pen.760160312