STABILIZATION AND MODIFICATION OF CELLULOSE DIACETATE - Photochemical Reactions in Heterochain Polymers - page 66

Thus, the rate of deactivation of excited states of all investigated HAC - stabilizers is
much larger, than the rate of intramolecular transfer of proton. Large difference is observed
between values of A for HAC - XLIX and HAC - L in spite of small difference in their
chemical structures. Computer calculation of electronic structure of HAC - XLIX and HAC -
L (Figure 2.10-2.12) shows that HAC - L structure is more planar than that of HAC - XLIX.
Figure 2.8. Dependence of quantum yield of O2 on light intensity in CDA film + HAC - XLIX.
Figure 2.9. Dependence of HAC - XLIX efficiency on its concentration.