Zobrazeno 1 - 10
of 95
pro vyhledávání: '"Fred E. Arnold"'
Autor:
Marlene D. Houtz, Charles Y.-C. Lee, Hongliu Sun, Seng C. Tan, N. Venkatasubramanian, Fred E. Arnold, James E. Mark
Publikováno v:
Journal of Macromolecular Science, Part A. 41:981-1000
A carboxylated polysulfone (C‐PSF) was reacted with 3‐(glycidoxypropyl)trimethoxysilane (GPS) in a sol–gel reaction to form hybrid networks. Specifically, GPS was grafted to the C‐PSF chains at their epoxy ends by ring‐opening reactions and
Autor:
C. Y-C. Lee, Fred E. Arnold, Hongliu Sun, Marlene D. Houtz, S. C. Tan, N. Venkatasubramanian, James E. Mark
Publikováno v:
Colloid & Polymer Science. 282:502-510
Molecular composites were prepared from sulfonated modifications of polysulfone and polyphenylsulfone by incorporating relatively stiff polybenzimidazole (PBI) chains into them. The composites were characterized by Fourier-transform infrared (FT-IR)
Autor:
Richard A. Vaia, Richard E. Smalley, Thuy D. Dang, Xiefei Zhang, Robert H. Hauge, Satish Kumar, Arup R. Bhattacharyya, Cheol Park, W. Wade Adams, Fred E. Arnold, Byung G. Min, Sivarajan Ramesh, Peter Willis
Publikováno v:
Macromolecules. 35:9039-9043
Poly(p-phenylene benzobisoxazole) (PBO) has been synthesized in the presence of single-wall carbon nanotubes (SWNTs) in poly(phosphoric acid) (PPA) using typical PBO polymerization conditions. PBO and PBO/SWNT lyotropic liquid crystalline solutions i
Autor:
C. Kumudinie, Jagath K. Premachandra, Marilyn R. Unroe, J. E. Mark, Thuy D. Dang, Fred E. Arnold
Publikováno v:
Polymer. 42:5275-5283
Some high-temperature polymers, specifically two poly(arylene ether)s and a hydroxy(benzoxazole) copolymer (HPBO), were toughened using dispersed rubbery phases generated by the sol–gel process. These rubbery phases were introduced using combinatio
Publikováno v:
Journal of Macromolecular Science, Part A. 38:1-9
The techniques of reinforcing relatively tractible polymers by means of intercalated and exfoliated clay particles are applied here to the more challenging case of a necessarily less tractible high-performance polymer. The polymer, poly(biphenyl ethe
Publikováno v:
Journal of Applied Polymer Science. 79:2326-2330
A phenyl ether phenyl phosphate polymer, specifically poly(biphenyl ether triphenyl phosphate), was modified to increase its tractability and to improve its toughness. The first goal was achieved by increasing its solubility by sulfonation of the cha
Publikováno v:
Macromolecules. 33:9060-9068
The thermomechanical behavior of several rigid-rod polymeric fibers has been investigated. Up to 300°C, all fibers exhibited the expected axial shrinkage on heating (CTE ≃ -6 x 10 -6 °C -1 ). However, a pronounced increase in thermal contraction
Publikováno v:
Macromolecules. 33:8731-8738
Monomethyl-pendant poly(p-phenylene benzobisimidazole) (MePBI) has been spun into fiber and compared with an analogous methyl-pendant poly(p-phenylene benzobisthiazole) (MePBZT). From FTIR and WAXD, the former system has been found to exhibit intermo
Publikováno v:
Polymer. 41:3213-3226
Acid–base interaction-mediated compatibilization between rigid-rod and matrix polymer components facilitated the formation and processing of solvent cast aromatic heterocyclic rigid-rod thermoplastic as well as thermoset molecular composites above
PREPARATION AND PROPERTIES OF SOME HYBRID AEROGELS FROM A SULFOPOLYBENZOBISTHIAZOLE-SILICA COMPOSITE
Publikováno v:
Journal of Macromolecular Science, Part A. 36:73-83
Aerogels were prepared so as to have a hybrid structure, by carrying out the supercritical drying process on composites consisting of an in situ generated silica network as the inorganic phase and a high-temperature polymer as the organic phase. The