Feasibility of Reprocessing Natural Fiber Filled Poly(lactic acid) Composites: An In-Depth Investigation

Table 5

FTIR functional group analysis of WF 30 PLA composite at cycle 0 and cycle 6 [20, 21].

Characteristic absorption (cm^−1)	Functional group	Indication by functional group
1769	Carboxylic acid	Oxidation
1505	Carboxylic acid	Oxidation
1454	Amine	Weaker bond
1370	Alcohols or phenols	Oxidation
1214	Ether/amine	Oxidation/weaker bond
1091	Ether/amine	Oxidation/weaker bond
1049	Ether/amine	Oxidation/weaker bond
870	Amine	Weaker bond