Methods for obtaining kinetic

Results of Method A The agitated ampoule method proved to have too many constraints to be useful as a method for obtaining kinetic samples for this reactive extrusion. The constraints were as follows o High initiator concentrations (>0.04 wt %) and high temperatures (e.g. 

Solution proceeds via modification of the convective-diffusion equation to include the relevant kinetic terms and new boundary conditions. Accounts of the general methods for obtaining kinetic currents, first developed for the DME, can be found in, for example, refs. 182-184. 

The extents of cure were determined utilizing DSC and FT-IR. DSC experiments were conducted on a Perkin-Elmer DSC-2 instrument. The method for obtaining kinetic parameters from scanning DSC has been described elsewhere (8). Isothermal extents of cure were determined by curing in the DSC for a predetermined time under nitrogen and then scanning at 10 K/min to determine the residual exothermic heat of reaction as compared with a scan of uncured resin. 

The most obvious of these other uses lies in the methods for obtaining kinetic data experimentally (Section 3.2). For example, in shock tube measurements, which are the most reliable source of high-temperature data, there are often several interfering or competing reactions. It is necessary to model the overall behaviour, using existing kinetic data, to obtain... 

Experimental methods for obtaining kinetic data for studying various (vpes of reactions in soils fall into three broad categories relaxation methods, hatch methods, and flow methods. Flow methods can be further subdivided iiilo flow methods without mixing and flow methods with mixing. A good ( view of these methods is found in Sparks (1989),... 

As these remarks indicate, chemical lasers employ infrared chemiluminescence. As a method for obtaining kinetic information, they have to be looked at in relation to other spectroscopic techniques having the same goal. The study of spontaneous vibrational-rotational emission has been most fruitfully applied to fast reactions in the gas phase. This method has experimental limitations due to the relaxation processes competing with spontaneous emission. A very authentic discussion of this method has been given in a recent review by J. C. Polanyi 3>. As opposed to this steady-state technique, chemical lasers permit observations in the pulsed mode. 

Some methods for obtaining kinetic information by affinity chromatography fit experimental elution data to empirical equations that can be used to describe profiles for a given set of application conditions. For instance, this approach has been used with zonal elution data obtained imder nonlinear elution conditions by using the following function. ... 

Dynamic NMR is a very powerful method for obtaining kinetic information about processes which occur at a suitable rate. ... 

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