
Stability of Polymeric Products to Oxidizing 109
020406080 100 120 140
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FIGURE 13 The kinetics of functional groups increasing at the action of O3 on polystyrene,
A – concentrations, mol/l x 10; T – min; 1 – O3 absorbance; 2 - ~C(=O)~; 3 - -O-O-; 4 - ~C(=O)-
OH.
In accordance with conversion increase it is possible to see as more reactive per-
oxide, hydroxyl and carbonyl groups react with ozone and transform up to carboxyl
groups. The transient formation of peroxide radicals in the system was detected in
direct experiments on their EPR-spectrum [64,67].
5.9 RISE OF PLASTIC ADHESION
The polyolefins and many other plastics are characterized ...