Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Daniel J. Kasprzak"'
Autor:
Gregory S. Blackman, Angela A. Pitenis, Daniel J. Kasprzak, Heidi Elizabeth Burch, Christopher P. Junk, Brandon A. Krick, Mark A. Sidebottom, Kathryn L. Harris, W. Gregory Sawyer
Publikováno v:
Wear. :179-185
Fluoropolymers have unique mechanical, chemical, and tribological properties (low friction coefficients) but their use as solid lubricants is inhibited by high wear rates (1–5×10−4 mm3/Nm). The addition of certain types of α-alumina has been sh
Autor:
H. David Rosenfeld, W. Gregory Sawyer, Angela A. Pitenis, Christopher P. Junk, Brandon A. Krick, Scott C. Brown, Ross S. Johnson, Gregory S. Blackman, Kathryn L. Harris, Daniel J. Kasprzak, Christopher Chan
Publikováno v:
Tribology International. 95:245-255
Polytetrafluoroethylene (PTFE) filled with certain alumina additives has wear rates over four orders of magnitude lower than unfilled PTFE. The mechanisms for this wear reduction have remained a mystery. In this work, we use a combination of techniqu
Autor:
Kathryn L. Harris, Gregory S. Blackman, Daniel J. Kasprzak, Brandon A. Krick, W. Gregory Sawyer, Christopher P. Junk, Angela A. Pitenis
Publikováno v:
Macromolecules. 48:3739-3745
The wear and friction behavior of ultralow wear polytetrafluoroethylene (PTFE)/α-alumina composites first described by Burris and Sawyer in 2006 has been heavily studied, but the mechanisms responsible for the 4 orders of magnitude improvement in we
Publikováno v:
The Journal of Chemical Thermodynamics. 40:25-31
Carbon dioxide solubility {(vapor + liquid) equilibria: VLE} in ionic liquid, 1-butyl-3-methylimidazolium acetate ([bmim][Ac]), has been measured with a gravimetric microbalance at four isotherms about (283, 298, 323, and 348) K up to about 2 MPa. (V
Publikováno v:
Applied Energy. 84:863-873
IR (infrared) line shapes of OH stretching bands in hydrogen-bonding states of ethanol–hexane solutions have been examined using a theoretically rigorous Voigt function, instead of the commonly used empirical Lorentz–Gauss equation. An efficient
Autor:
Daniel J. Kasprzak, Bertsil B. Baker
Publikováno v:
Polymer Degradation and Stability. 42:181-188
Weight-loss data have been obtained for the degradation in air of tetrafluoro-ethylene (TFE) homopolymer, its copolymers with hexafluoropropylene (HFP) and perfluoropropylvinyl ether (PPVE), and for TFE/ethylene/perfluorobutylethylene terpolymer. The
Autor:
Gregory A. Nemeth, Rodney Vickery, Michael B. Maurin, Michael J. Haas, Daniel J. Kasprzak, Shelley R. Rabel Riley
Publikováno v:
Journal of pharmaceutical and biomedical analysis. 54(2)
The thermal properties of three matrix metalloproteinase (MMP) inhibitors were investigated using a variety of instrumental methods. Differential scanning calorimetry revealed highly exothermic processes for all compounds above 200 °C, and thermogra
Autor:
Frederic B. Clarke, Marc L. Janssens, Henri Van Kuijk, Bertsil B. Baker, William C. Seidel, Joanne K. Bonesteel, Daniel J. Kasprzak, G.T. Makovec, Rudolph Valentine, Claire Herpol
Publikováno v:
Journal of Fire Sciences. 10:488-527
The combustion or pyrolysis of perfluorinated resins, under cer tain laboratory conditions (e.g., the "NIST" smoke toxicity test), produces fumes which are 2-3 orders of magnitude more toxic than the smoke from common plastics or wood. To determine w
Publikováno v:
Physical Chemistry Chemical Physics. 9:5018
We have studied temperature dependent IR spectra of the C-H stretching modes of the imidazolium ring in [bmim][PF(6)], [bmim][Tf(2)N], [emim][Tf(2)N], [hmim][Tf(2)N], and [bmim][BF(4)]. Temperatures in this study are from 278 to 348 K at an interval
Autor:
Lauren C. Sutula, John P. Collier, Kenneth A. Saum, Barbara H. Currier, John H. Currier, W. Michael Sanford, Michael B. Mayor, Robin E. Wooding, Daniel K. Sperling, Ian R. Williams, Daniel J. Kasprzak, Victor A. Surprenant
Publikováno v:
Clinical Orthopaedics and Related Research. :28
Despite studies to determine their causes, significant variations in polyethylene acetabular component wear rates, radial cracking of component rims, and occasional delamination cannot be explained. A subsurface white band frequently occurs in such d