polyphenyl

polyphenyl

[′päl·i‚fen·əl]
(organic chemistry)
Any of a group of direct colors used to dye cotton and wool.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Polymethylene polyphenyl isocyanate (PM-200) with a NCO content of 31.3 wt% and a viscosity of 197 mPa [s.sup.-1] at 25 [degrees]C was provided by Yantai Wanhua Chemical Group Co.
Xu, "Formation of polyphenyl chains through hierarchical reactions: ullmann coupling followed by cross-dehydrogenative coupling," Chemical Communications, vol.
Polymethylene polyphenyl isocyanate 25.12% 4,4'-Diphenylmethane diisocyanate 20.09% Methylene diisocyanate 12.56% Flash point 199[degrees]C Density 1.13 g/[cm.sup.3] Operational time at room 30 min temperature (21[degrees]C) Clamp time 6 h Table 3.--Southern pine decking board sample characteristics.
Suitable crystallizable polymers include polyethylene glycol (PEG), nylon, polyalkenes, polybutylterephthalates, polyethylene terepthalates, polyvinyl acetates, polyvinyl chlorides, polyphenyl sulfones, and polycaprolactones.
Examples range from bismuth telluride (1,6) to combinations of bismuth and tellurium and other elements such as antimony and selenium (3,6) to lead-selenium-tellurium (4) to polyphenyl ether molecule chains (5) to cobaltates on a silicon substrate.
The researchers discovered the potential for converting heat into electricity when they studied polyphenyl ethers, molecules that spontaneously aggregate into polymers, long chains of repeating units.
The cross-linked siloxane-polyurethane systems that have been reported were prepared by the crosslinking of Si-O-Si through a hydrolysis condensation process (7-8) or by the reaction of NCO and OH groups in the polymethane polyphenyl polyisocyanate and in the multifunctional polysiloxane polyols, respectively, (9) or by the incorporation of polyhydric alcohols into the polyurethane formulation.
28, the Sentinel published a list of some ingredients of CheckMate, noting that it included polymethylene polyphenyl isocyanate (PPI), which has been linked to respiratory problems.
Investigation results are presented on degradation transformations in aliphatic-aromatic polyimides and polyamides, polysulfones and polyester imides, liquid-crystal copolyesters, and polyphenyl quinoxalines in various temperature ranges.
Likewise, SLS can use unfilled and glass-filled nylons, while FDM uses ABS, polycarbonate, and polyphenyl sulfone (PPSF).
SYNTHESIS OF 4,4'-DINITROAND 4,4'-DIAMINO- DERIVATIVES OF CHAIN-TYPE POLYPHENYL COMPOUNDS.