Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Debra A. Wrobleski"'
Publikováno v:
Polymer Degradation and Stability. 121:60-68
The long-term use of polysiloxane foams requires a good understanding of the diverse factors that may influence their performance. The aim of the present work was to understand the interplay between in-service environments and reactive species that r
Autor:
Andrea Labouriau, Jamie A. Stull, Debra A. Wrobleski, Kevin Henderson, Adam T. Zocco, John Gill, Dean Taylor, Carl M. Cady
Publikováno v:
Polymer Degradation and Stability. 117:75-83
The present work involves the investigation of ionizing radiation effects on silica filled poly (dimethyl siloxane) foam vulcanized at room temperature. In order to better predict aging effects in these materials, it is important to understand the in
Publikováno v:
Journal of Membrane Science. :438-449
The backbone stability of benzyl-trimethyl ammonium (BTMA) functionalized polyaromatics was investigated in two structurally differing polymer architectures; quaternized poly(arylene ether) (PAE) and poly(phenylene) (PP). FTIR analysis indicated the
Autor:
Rex P. Hjelm, Debra A. Wrobleski, Marilyn E. Hawley, E. Bruce Orler, Joseph T. Mang, Jeffrey B. Kortright, Cynthia F. Welch
Publikováno v:
Journal of Polymer Science Part B: Polymer Physics. 51:149-157
Combined soft X-ray scattering and reflectometry techniques promise analysis of polymer thin film domain structure and composition without resorting to chemical modification or isotopic labeling. This work explores the capabilities of these technique
Publikováno v:
Macromolecules. 41:4358-4370
Segmented polyurethanes consist of alternating rigid aromatic (hard) and flexible (soft) segments that phase separate into hard and soft segment-rich nanodomains. The domain structure results in what has been presumed to be an extended, cross-linked
Autor:
Katherine J. Wurden, E. Bruce Orler, Thomas J. Flaherty, David A. Langlois, Debra A. Wrobleski, Darren L. Williams, James C. Timmons
Publikováno v:
Applied Spectroscopy. 61:608-612
The spectral signatures of nitro attack of the aromatic portion of thermoplastic urethanes (TPU) were determined. Eight fragment molecules were synthesized that represent the nitrated and pristine methylenediphenyl section common to many TPUs. Infrar
Autor:
David E. Hanson, Kiran Chitanvis, Marilyn E. Hawley, Debra A. Wrobleski, Philip J. Rae, R. J. Houlton, E. Bruce Orler
Publikováno v:
Polymer. 46:10989-10995
Under repeated tensile strain, many particle-filled polymers such as silica-filled polydimethylsiloxane (PDMS), exhibit a reduction in stress after the initial extension, the so-called Mullins effect, and the mechanism(s) responsible for this is cons
Autor:
Timothy P. Hanusa, Alfred P. Sattelberger, Christopher J. Kuehl, Christin N. Carlson, Ian M. Steele, Rosemary E. White, Brian L. Scott, Cheslan K. Simpson, Debra A. Wrobleski, Victor G. Young, Teresa A. Croce, Kevin D. John
Publikováno v:
Organometallics. 24:3685-3691
Reaction of 2 or 3 equiv of potassium 1,3-bis(trimethylsilyl)allyl (K[1,3-(SiMe3)2C3H3] = K[A‘]) with the triflate salts of Ce, Nd, Eu, Tb, and Yb gives the corresponding neutral bis-(Yb, Eu) and tris-(Ce, Nd, Tb) allyl lanthanide complexes in yiel
Autor:
Melanie McCarty, Wayne A. Rodin, David A. Spieker, Bobby G. Russell, E. Bruce Orler, J. Michael Lightfoot, Debra A. Wrobleski, Russell T Pack, Michael R. Salazar, Roger A. Assink
Publikováno v:
Journal of Polymer Science Part A: Polymer Chemistry. 41:1136-1151
Hydrolytic degradation data from a wide variety of experiments on Estane 5703, a commercial poly(ester urethane), are modeled with an A Ac 2 mechanism of reversible esterification and hydrolysis together with a cluster model for water concentration.
Publikováno v:
Radiation Physics and Chemistry. 66:129-135
Optical absorption and luminescence measurements have been made on 4,4′-methylenediphenyl 1,1′-diisocyanate (MDI)-based poly(ester urethane) (PESU) and model compounds diphenylmethane (DPM) and butanol-capped MDI. Phosphorescence spectra of the t