Now showing items 41-50 of 54
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 ...
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 ...
Microstructural deformation behaviour in polystyrene-based compatible polymer blend systems
(Elsevier, 1994-05)
Microstructural deformation behaviour in polystyrene-based compatible polymer blend systems was studied using transmission electron microscopy (TEM) and microdensitometry. Four different binary compatible blend systems ...
Temperature and concentration dependence of diffusion coefficient in dilute solutions
(Elsevier, 1981-09)
Temperature and molecular weight dependence of kD in D(C) = D(O) [1 + CkD], where D(C) is the diffusion coefficient for the density fluctuations in a dilute polymer solution, is investigated by first expressing D(C) as a ...
Toughening mechanisms in thermoplastic-modified epoxies: 1. Modification using poly(phenylene oxide)
(Elsevier, 1993-09)
An epoxy based on the diglycidyl ether of bisphenol A (DGEBA) has been modified with poly(phenylene oxide) (PPO) and cured with piperidine. A two-phase alloy resulted, in which the DGEBA epoxy was the continuous phase. ...
Thermal effects in styrene-butadiene rubber at high hydrostatic pressures
(Elsevier, 1986-12)
The temperature changes as a result of rapid hydrostatic pressure applications are reported for unvulcanized styrene-butadiene rubber (SBR) in the reference temperature range from 292 to 405 K and in the pressure range ...
Fatigue craze initiation in polycarbonate: study by transmission electron microscopy
(Elsevier, 1994-08)
Fatigue craze initiation in bulk, amorphous polycarbonate (PC) is investigated by means of transmission electron microscopy. The results agree very well with small angle X-ray scattering measurements of the same set of ...