Chemiluminescence Arrhenius plots

Table 2 Summary of temperature coefficients determined from Arrhenius plots of chemiluminescence intensity vs. temperature plots...

Figure 7 Arrhenius plots for non-isothermal chemiluminescence runs of oxidized polymers, (1) polypropylene, (2) polyethylene, in oxygen, heating rate 2.5°C/min. 

The observed rates of chemiluminescence below 40 C were usually lower than predicted by extrapolation of the Arrhenius plots (e.g.. Figure 1). This is a reasonable result In view of the curve shape at higher temperatures, which shows a decline in emission with time. Since the samples were stored at 25 C, they have been under examination conditions since the time of fabrication, and would In effect already be In this post-maximum region at the time of observation. 

Figure 1. Arrhenius plots of chemiluminescence maxima from paper A Cnj in humid air and paper C (O) in dry air...

FIGURE 3.14 Arrhenius plots of chemiluminescence intensity versus 1/T for PETinitial, PETC337, PETCi52, and PETCi53, under nitrogen. 

Figure 1. Arrhenius plots of chemiluminescence from oxidized polymer...

Data for temperature coefficients (activation energies) given in Table 2 show one common phenomenon when plotting chemiluminescence intensity vs. temperature in Arrhenius coordinates, namely, that in the higher temperature range the activation energy is usually higher than at lower temperatures, which is... 

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