Study on Thermal Behavior of Some Biocompatible and Biodegradable Materials Based on Plasticized PLA, Chitosan, and Rosemary Ethanolic Extract

Table 3

TG data for PEG-plasticized PLA containing chitosan and powdered rosemary ethanolic extract.

Sample	Degradation step	(°C)	(°C)	(%)	(°C)	(°C)	GS (°C)
PLA/PEG	I	276.8	321.4	82.52	285.5	298	334	(337)
	II	372.2	401.5	16.30			394	(400)
	Residue			1.18
PLA/PEG/3CS	I	280.8	325.8	73.72	290.2	294	325	(334)
	II	369.2	409.4	20.40				(407)
	Residue			5.88
PLA/PEG/6CS	I	285.8	323.3	79.38	292.5	304.5	336	(332)
	II	371.1	402	18.48			394	(410)
	Residue			2.14
PLA/PEG/0.5R	I	284.8	336.4	83.03	294	307.5	348	(342)
	II	375.3	402.8	15.04				(415)
	Residue			1.93
PLA/PEG/3CS/0.5R	I	282.7	329.7	69.15	293.5	312.6	345	(343)
	II	370.3	395.4	21.36				(399)
	Residue			9.49
PLA/PEG/6CS/0.5R	I	294.7	332.6	79.77	303	314	341	(340)
	II	377.5	406.1	17.96			406	(410)
	Residue			2.27

Decomposition temperatures: : onset of decomposition; T_max: temperature corresponding to maximum mass loss rate and corresponding to 10% () and 20% () mass loss (); GS: the temperature at which the maximum amount of gas was released (determined from Gram–Schmidt curves using Proteus software while in brackets are values evaluated from 3D spectra using OPUS programme) from each decomposition step. The accordance of both types of GS values is evident.