Results 161 to 170 of about 3,150 (192)
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Pulsed laser ablation and deposition of fluorocarbon polymers
Applied Surface Science, 1996Thin films of polytetrafluoroethylene (PTFE) and polyvinylidene fluoride (PVDF) have been formed by the pulsed-laser deposition technique. The structure of the PTFE films depends upon the substrate temperature during deposition. At substrate temperatures from room temperature to 200°C the films were determined to be amorphous.
M. Grant Norton +3 more
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Thermal degradation of phenyl modified fluorocarbon polymers
Polymer Degradation and Stability, 1994Abstract The effect of modification by phenyl groups on the thermal stabilities of poly(chlorotrifluoroethylene) (PCTFE) and the copolymer of chlorotrifluoroethylene and vinylidenefluoride (Kel-F) has been examined. The thermal degradation behaviour, studied by thermogravimetry (TG), thermal volatilization analysis (TVA) and subambient TVA (SATVA ...
Shagufta Zulfiqar +2 more
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Fluorocarbon polymers with alternating oxyalkylene and oxysilylene units
Journal of Polymer Science: Polymer Chemistry Edition, 1975AbstractLinear polymers were prepared by the condensation of bis(dimethylamino)dimethylsilane and 1,4‐bis(dimethylaminodimethylsily)benzene with fluorocarbon diols. 1,5‐Dihydroxy‐3‐methyl‐1,1,5,5‐tetrakis(trifluoromethyl)‐2‐pentene, the cis addition product of hexafluoroacetone and isobutylene, with the silylbenzene monomer gave a polymer that cured at
A. Charles Tanquary +2 more
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Adhesion studies of metals on fluorocarbon polymer films
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 1990Adhesion of metal films to several fluorocarbon polymer films is studied for Cu, Cr, Ti, Al, and Au. The polymers include polytetrafluoroethylene (PTFE), fluoroethylenepropylene (FEP), and a copolymer containing a perfluoroalkoxy group (PFA), all deposited on Cr/SiO2 substrates by spin coating.
Chin-An Chang +2 more
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Incorporation of a fluorocarbon polymer implanted at the posterior surface of the rabbit cornea
Journal of Biomedical Materials Research, 1996An implant of porous expanded polytetrafluoroethylene (PTFE) in the corneal stroma allows fast cell colonization and can become translucent. We studied the behavior of the same polymer implanted in the anterior chamber of the rabbit eye and sutured to the posterior surface of the cornea. The expanded tetrafluoroethylene was provided as 200-micron thick
G, Renard +5 more
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Aspect ratio dependent plasma polymer deposition of fluorocarbons
Microelectronic Engineering, 2006The plasma polymer deposition of fluorocarbons on structured silicon samples with trenches with aspect ratios from 0 to 17 was experimentally investigated for sample temperatures from 0 to 100^oC under low dc-bias conditions (30V) and for 0^oC sample temperature under high dc-bias conditions (80V).
B.E. Volland, I.W. Rangelow
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Gauge factor measurements for fluorocarbon polymer-gold films
Vacuum, 1985Abstract Thin polymer-metal films were prepared by simultaneous plasma polymerization of tetrafluoromethane (CF 4 ) in an rf glow discharge and evaporation of gold. By controlling the deposition parameters various amounts of gold could be incorporated in the polymer matrix giving a wide range of sheet resistances.
RE Thurstans +4 more
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Synthesis of novel fluorocarbon ether bibenzoxazole polymers
Journal of Polymer Science: Polymer Chemistry Edition, 1978AbstractNovel fluorocarbon bis(o‐aminophenol) monomers were synthesized by a multistep route from 1,3‐diiodohexafluoropropane and 1,8‐diiodohexadecafluorooctane. The acetic acid‐promoted polycondensation of these monomers with fluorocarbon ether‐diimidate esters led to linear, soluble fluorocarbon ether‐bibenzoxazole polymers with inherent viscosities ...
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Nature, 1955
VARIOUS studies started four years ago have suggested that complexes form between —CF2 and —CF3 groups and polar groups such as —OH, —NH2, —SH, —RNH, etc. This interaction appears to be independent of the position of these polar groups and has been observed in solution as well as in solids. Thus, it is quite different from urea-hydrocarbon complexes1.
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VARIOUS studies started four years ago have suggested that complexes form between —CF2 and —CF3 groups and polar groups such as —OH, —NH2, —SH, —RNH, etc. This interaction appears to be independent of the position of these polar groups and has been observed in solution as well as in solids. Thus, it is quite different from urea-hydrocarbon complexes1.
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Porous Covalent Organic Polymers for Efficient Fluorocarbon‐Based Adsorption Cooling
Angewandte Chemie - International Edition, 2021Jian Zheng +2 more
exaly