Now showing items 41-50 of 63
Zone fractionation of cyclohexane-rich polystyrene–cyclohexane solid solutions This investigation was supported by a National Science Foundation Grant. Presented before the International Symposium on Macromolecular Chemistry; I.U.P.A.C., Montreal, Canada, July 1961.
(Wiley Subscription Services, Inc., A Wiley Company, 1964-03)
Experimental results on the application of zone melting techniques to dilute solutions of polystyrene in cyclohexane under various operating conditions are reported together with observations on static solidification tests ...
Synthesis and homopolymerization studies of vinylimidazolium salts
(Elsevier, 1973-12)
The preparations and characterizations of several monomeric vinylimidazolium salts are presented from the quaternizations of 1-vinylimidazole and 2-methyl-1-vinylimidazole with n-alkyl iodides and with dimethyl sulphate. ...
At-column heating and a resistively heated, liquid-cooled thermal modulator for a low-resource bench-top GC×GC
(WILEY-VCH Verlag, 2006-05)
A transportable GC×GC instrument is under development for on-site applications that would benefit from the enhanced resolution and powers of detection, which can be achieved by this method. In the present study, a low-resource ...
A quantitative adhesion test for thin polymer films on silicon substrates
(Wiley Subscription Services, Inc., A Wiley Company, 1991-10-05)
The standard 90° peel test was modified in order to apply it to testing adhesion of thin polymer films to surfaces of silicon substrates, such as the silicon nitride passivation layer used in our solid-state chemical ...
Solution and bulk properties of branched polyvinyl acetates part III--Intrinsic viscosity and light scattering measurements
(Elsevier, 1964)
Light scattering and intrinsic viscosity measurements have been made on three different series of vinyl acetate polymers, one linear and two branched. One of the branched series was obtained by fractionation of a high ...
Solution and bulk properties of branched polyvinyl acetates part II--Synthesis of some branched polyvinyl acetates
(Elsevier, 1964)
A series of comb-shaped branched polyvinyl acetates has been prepared by a graft polymerization technique. Branches of a specified average chain length have been grafted to a linear backbone polymer with a narrow molecular ...
Solution and bulk properties of branched polyvinyl acetates IV--Melt viscosity
(Elsevier, 1964)
The melt viscosities of some randomly branched and some comb shaped branched polyvinyl acetate fractions were compared to the viscosities of linear polymer over a range of molecular weights. The melt viscosity of the ...
Random coil dimensions of poly(diethyl siloxane)
(Elsevier, 1978-04)
A sample of high molecular weight poly(diethyl siloxane), [Si(C2H5)2---O---]x, (PDES) was separated into a series of fractions by means of liquid-liquid precipitations. Four of the fractions were studied by osmometry and ...
MMA bulk polymerization and its influence on in situ resin viscosity comparing several chemorheological models
(Wiley Subscription Services, Inc., A Wiley Company, 2011-05-05)
Earlier published rheological data of methyl methacrylate (MMA) heated and isothermally polymerized at temperatures between 50 and 80°C have been reanalyzed using three semiempirical models of viscosity advancement including ...
Improved methods for the determination of hansen's solubility parameters and the estimation of solvent uptake for lightly crosslinked polymers
(Wiley Subscription Services, Inc., A Wiley Company, 1996-12-19)
Two new methods for determining Hansen's three-dimensional solubility parameters (3DSP) for lightly crosslinked polymers are presented and evaluated using commercial glove materials composed of butyl, natural, nitrile, and ...