[Retracted] The Influence of Chemically Treated Hemp Fibre on the Mechanical Behavior and Thermal Properties of Polylactic Acid Made with FDM

Table 5

Extrusion parameters.

Parameters	Untreated	7% NaOH	1% silane	2% silane	3% silane
Lignin	1028	1022	1032	1034	1032
Cellulose CH2	2821	3144	3242	3244	3245
Hydroxyl group -OH	3100–3300	3100–3300	3100–3300	3100–3300	3100–3300
Stretching N-H	3128–3140	3100–3128	—	—	—
Ethyl carbonyl group C=O	1618	1612	1608	1608	1608
Hemicellulose CH	2814–2816	2904	2904	2912	2312
Absorption of water	1584	1502	1434	1434	1434
Si-C stretching bond silane	8821	831.2	822.6	910–920	910–920
Ester carbonyl group C=O	1619	1601	1602	1602	1602