Carbonyl index, polyethylene films

As part of a multi-technique investigation (see also discussion under mid-infrared spectroscopy later), Corrales et al. [13] plotted the carbonyl index for films prepared from three grades of polyethylenes a high-density PE (HDPE), a linear low-density PE (LLDPE) and a metallocene PE (mPE) (see Figure 5). In this study, the data trend shown in Figure 5 correlated well with activation energies derived from the thermal analysis, which showed that the thermal-oxidative stability followed the order LLDPE > mPE > HDPE, whereas the trend... 

Fig. 3.19. Change in carbonyl index (cf. section 10.17.1.7) of low density polyethylene films during UV irradiation. Numbers on the curves indicate processing times at 150 °C in air (HA) heated in argon (IA) irradiated in argon (C) closed mixer. (Reprinted with permission from [414], Pergamon Press Ltd, Oxford, England.)...

Table 1. Total luminescence intensisty (TLl) and carbonyl index for polyethylene films containing Fe(Il)-stearate and polyoctylene (PE-MO), Fe(ll)-stearate (PE-M) or a commercial prooxidant system (PE-A) aged in air at 80 C.

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