Fig. 11(Color online) IR transmission spectrum for a mixture of LAB, PPO, and bis-MSB, depicted as a blue solid line. The spectrum primarily reflects the characteristics of LAB due to the low concentrations of PPO and bis-MSB, with negligible visible peaks from these additives. Variations in transmittance are noted, especially a maximum increase up to
2% around 3500
cm-1. An unusual decrease of about
5% relative to an increasing trend around 2900
cm-1 suggests complex interactions between PPO and bis-MSB within the LAB matrix. Further details are provided in a subfigure located at the bottom left of
.
