Polylactic Acid-Based Film Modified with Nano-Ag-Graphene-TiO₂: New Film versus Recycled Film

Table 2

Thermal properties of the films.

Sample	Tg (°C)	TCC (°C)	Tm (°C)	ΔHCC (J/g)	ΔHm (J/g)	Xc
Neat PLA	60.2 ± 2.2^a	121.9 ± 9.2^a	150.5 ± 4.4^a	17.0 ± 0.7^a	17.12 ± 5.1^a	0.129 ± 0.001^a
New film	58.1 ± 3.3^a	117.6 ± 8.1^b	148.1 ± 7.9^b	15.1 ± 1.1^b	17.2 ± 5.3^a	2.258 ± 1.7^b
Recycled film	59.7 ± 4.8^b	95.2 ± 3.4^c	178.6 ± 10.2^c	21.2 ± 1.9^c	32.2 ± 3.9^b	11.827 ± 4.8^c

T_g, glass transition temperature; T_CC, crystallization temperature; T_m, melting temperature; ΔH_CC, enthalpy of cold crystallization; ΔH_m, melting enthalpy. In each line, mean values with superscript letters (^a,b,c) are statistical nonsignificant different at (one-way ANOVA—Tukey’s test).