Y. Israeli et al., PHOTOOXIDATION OF POLYDIMETHYLSILOXANE OILS AND RESINS .4. EFFECT OF PHENYL GROUPS, Polymer degradation and stability, 47(3), 1995, pp. 357-362
Photooxidations at wavelengths longer than 300nm of polydimethylsiloxa
ne (PDMS) containing various contents of MePh and Ph(2) groups have be
en examined, both in the case of linear and crosslinked silicones. FTI
R, UV and fluorescence spectroscopies reveal a slow photooxidation inv
olving both scission and oxidation of the phenyl ring. No significant
yellowing can be associated with the presence of the phenyl ring excep
t in the case of short wavelength irradiation.