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Topic Area: Polymers
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Displaying records 521 to 530 of 550 records.
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521. The Influence of the Laser Energy and Matrix of MALDI on the Molecular Mass Distribution of Poly(ethylene glycol)
Topic: Polymers
Published: 3/1/2003
Authors: S Wetzel, Charles Martin Guttman, Kathleen M. Flynn
Abstract: The molecular mass distribution (MMD) that is obtained in synthetic polymer characterization may be biased by preferential desorption/ionization of low mass polymer molecules, preferential ion attachment to larger polymers, or degradation and fragmen ...

522. The Molecular Origin of Enhanced Toughness in Double-Network Hydrogels
Topic: Polymers
Published: 10/22/2007
Authors: Taiki Tominaga, Vijay Tirumala, Eric K Lin, Jian P. Gong, Hidemitsu Furukawa, Yoshihito Osada, Wen-Li Wu
Abstract: The long-standing pursuit of a synthetic equivalent to tissue cartilage has seen significant new activity with the development of a new materials strategy: double-network hydrogels (DN-gels) prepared from a combination of an anionic polyelectrolyte ...

523. The Optimization of MALDI-TOF-MS for Synthetic Polymer Characterization by Fractorial Design
Topic: Polymers
Published: 1/1/2004
Authors: S Wetzel, Charles Martin Guttman, Kathleen M. Flynn, James J Filliben

524. The molecular basis of mesophase ordering in a thiophene-based copolymer
Topic: Polymers
Published: 2/18/2009
Authors: Dean M DeLongchamp, Regis J Kline, Youngsuk Jung, Eric K Lin, Daniel A Fischer, David J Gundlach, Andrew Moad, Lee J Richter, Michael F. Toney, Martin Heeney, Iain McCulloch
Abstract: The carrier mobility of poly(2,5-bis(3-alkylthiophen-2-yl) thieno[3,2-b]thiophene) semiconductors can be substantially enhanced after heating through a thermotropic mesophase transition, which causes a significant improvement in thin film structural ...

525. Thermal Expansion Coefficients of Low-K Dielectric Films From Fourier Analysis of X-Ray Reflectivity
Topic: Polymers
Published: 1/1/2000
Authors: Charles E. Bouldin, William E Wallace III, G W Lynn, S C Roth, Wen-Li Wu

526. Thermal and Flammability Properties of a Silica-Pmma Nanocomposite
Topic: Polymers
Published: 1/1/2000
Authors: Abby W. Morgan, Joseph M Antonucci, Mark R VanLandingham, R H Harris, Takashi Kashiwagi

527. Thermally Induced Stress Relaxation and Densification of Spin-on-Glass Thin Films
Topic: Polymers
Published: 1/1/2000
Authors: C. K. Chiang, William E Wallace III, G W Lynn, D Feiler, W. Xia
Abstract: The stress-temperature relationship of silica spin-on-glass thin films on silicon wafers was studied. Upon heating the stress-temperature curves showed a dramatically increasing slope when the temperature of the film was greater than 340 C. At 45 ...

528. Thermodynamic Interactions in Double-Network Hydrogels
Topic: Polymers
Published: 3/11/2008
Authors: Taiki Tominaga, Vijay Tirumala, Sanghun Lee, Eric K Lin, Jian P. Gong, Wen-Li Wu
Abstract: Double-network hydrogels (DN-gels) prepared from the combination of a moderately crosslinked anionic polyelectrolyte and an uncrosslinked linear polymer solution exhibit mechanical properties such as fracture toughness that are intriguingly superior ...

529. Thermoreversible Gels from Mixtures of a High-melting Ionic Liquid and a Polar Polymer for Self-Healing Materials
Topic: Polymers
Published: 3/27/2011
Authors: Joonsung (Joonsung) Yoon, Christopher M Stafford
Abstract: We investigate a new kind of PVOH physical gel in which the volatile water is replaced with a non-volatile ionic liquid (IL). High melting IL containing Br- anion was chosen so that the hydrogen-bond accepting Br- can enhance miscibility with PVOH wh ...

530. Thickness effect on the viscoelastic properties of polystyrene thin films as measured by thermal wrinkling
Topic: Polymers
Published: 12/29/2010
Authors: Edwin P Chan, Santanu S. Kundu, Qinhuang Lin, Christopher M Stafford
Abstract: The viscoelastic properties of polymer thin films can have a significant impact on the performance in many small-scale devices. In this work, we use thermal wrinkling, which is a phenomenon based on a thermally-initiated instability, to measure visco ...

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