Mechanical and Optical Properties of Polylactic Acid Films Containing Surfactant-Modified Cellulose Nanocrystals

Figure 9

Photographs of four PLA-CNC(10%)-DA films that are stacked on top of one another with an offset such that the edges are one film thick and the center is four films thick. The stacked films are viewed (a) in unpolarized light, (b) between crossed polars at a 0° angle, and (c) between crossed polars at a 45° angle.

(a)

(b)

(c)