Table 1: Composition of the used and rejuvenated bumpers.

Fraction soluble at 25°C
% w/w
Fraction soluble at 75°C
% w/w
Fraction soluble at 110°C
% w/w
Cross-linked fraction
% w/w
Inorganic fraction
% w/w
Oxidable residue (carbon black % w/w

A,1719 61tr12
AR19 22 56tr12
B1131401152
BR9 32 411152
C, 930471121
CR9 30 462121

tr: traces.