Chemiluminescence from the isothermal oxidation of SBR and NBR elastomers

Accelerating effect of poly(methyl methacrylate) on rubber oxidation, Part 1: A chemiluminescence study

“…The rubbers chosen were poly(ethylene-stat-propylenestat-5-methylene-2-norbornene) (EPDM), poly(ethylene-stat-vinyl acetate) (EVA), carboxy terminated poly(acrylonitrile-stat-butadiene) (NBR) and poly(1,3-butadiene-stat-styrene) (SBR). In comparison with PMMA these elastomers are all rather easily oxidised, exhibiting the typical autoaccelerating oxidation accompanied by production of hydroperoxides, carbonyls, alcohols, acids, esters and unsaturation [9][10][11][12].…”

“…More recently it has been suggested that CL may arise from, or be moderated by interactions with impurities or deliberately added reagents, acting as CL activators [19][20][21][22]. However, despite the fact that the detailed mechanism of CL emission is uncertain, its intensity has been shown to correlate with oxidation as measured by oxygen uptake [23] accumulation of oxidation products (hydroperoxides, carbonyl) [12,[24][25][26][27] or failure time in oven ageing [28]. In particular, the induction period, i.e.…”