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

Table 2

Approximate percentage of colors of PLA-CNC composites observed under polarized light microscopy with a first-order red plate.

	0°			45°			Estimated oriented area
	Magenta	Yellow	Blue	Magenta	Yellow	Blue
PLA	100%	0%	0%	100%	0%	0%	0%
PLA-CNC(1%)-UM	53%	42%	5%	77%	22%	1%	70%
PLA-CNC(3%)-UM	92%	3%	5%	0%	89%	11%	108%
PLA-CNC(1%)-DA	43%	23%	34%	59%	26%	14%	97%
PLA-CNC(3%)-DA	40%	38%	21%	60%	26%	14%	100%
PLA-CNC(1%)-CTAB	100%	0%	0%	100%	0%	0%	0%
PLA-CNC(3%)-CTAB	97%	1%	2%	95%	2%	3%	8%