Obtaining a Flexible Film Elaborated from Cassava Thermoplastic Starch and Polylactic Acid

Table 1

Results of tensile mechanical properties.

Treatment		Elastic modulus; (MPa)		Maximum tensile strength; (MPa)		Maximum elongation; at the rupture point; (%)
		Long	Trans	Long	Trans	Long	Trans
1	A1P1T1	104.71 ± 0.20	85.46 ± 1.24	3.19 ± 0.19	2.57 ± 0.05	14.02 ± 3.47	16.22 ± 0.53
2	A1P1T2	211.96 ± 1.51	146.41 ± 0.49	4.23 ± 0.13	3.68 ± 0.25	9.92 ± 0.92	13.88 ± 3.81
3	A1P1T3	161.63 ± 0.06	99.05 ± 0.70	3.45 ± 0.12	2.76 ± 0.06	10.41 ± 0.49	7.63 ± 0.76
4	A1P2T1	230.06 ± 0.31	139.13 ± 0.42	4.25 ± 0.20	3.53 ± 0.04	7.92 ± 1.61	10.47 ± 0.42
5	A1P2T2	231.32 ± 2.00	165.90 ± 1.51	4.06 ± 0.04	3.77 ± 0.06	6.01 ± 0.54	11.45 ± 0.61
6	A1P2T3	193.41 ± 0.50	98.17 ± 0.92	3.63 ± 0.06	2.15 ± 0.07	7.15 ± 0.74	6.81 ± 0.96
7	A1P3T1	259.05 ± 0.71	112.23 ± 0.55	4.76 ± 0.28	2.73 ± 0.12	13.09 ± 2.74	5.84 ± 1.11
8	A1P3T2	189.07 ± 0.50	205.65 ± 0.68	3.53 ± 0.12	4.47 ± 0.28	5.86 ± 0.68	10.95 ± 0.19
9	A1P3T3	291.02 ± 1.2	146.73 ± 0.66	4.99 ± 0.37	4.06 ± 1.17	9.36 ± 1.96	10.62 ± 0.87
10	A2P1T1	141.62 ± 0.25	119.60 ± 0.24	3.51 ± 0.18	3.77 ± 0.09	9.41 ± 1.68	17.59 ± 1.09
11	A2P1T2	209.13 ± 1.58	87.13 ± 1.02	4.32 ± 0.12	3.48 ± 0.14	11.43 ± 0.46	22.76 ± 2.68
12	A2P1T3	195.77 ± 0.46	149.32 ± 0.64	4.22 ± 0.02	3.73 ± 0.07	12.12 ± 0.73	12.17 ± 2.71
13	A2P2T1	151.56 ± 0.79	121.33 ± 0.04	4.03 ± 0.18	3.72 ± 0.14	16.92 ± 1.81	18.46 ± 2.02
14	A2P2T2	216.35 ± 0.55	174.56 ± 0.36	4.32 ± 0.18	4.39 ± 0.05	8.90 ± 0.21	18.60 ± 2.12
15	A2P2T3	257.91 ± 0.56	118.28 ± 0.30	4.60 ± 0.13	3.02 ± 0.02	12.15 ± 1.05	10.46 ± 1.75
16	A2P3T1	234.89 ± 2.48	271.52 ± 0.85	4.55 ± 0.10	5.55 ± 0.31	8.46 ± 1.09	8.57 ± 0.77
17	A2P3T2	323.69 ± 0.85	277.03 ± 0.27	5.69 ± 0.32	4.87 ± 0.34	8.84 ± 1.14	7.63 ± 1.92
18	A2P3T3	309.57 ± 1.17	228.26 ± 3.86	5.09 ± 0.26	4.48 ± 0.12	6.10 ± 1.06	11.04 ± 2.36
19	A3P1T1	188.97 ± 1.35	86.43 ± 0.25	4.30 ± 0.09	3.67 ± 0.07	24.38 ± 1.46	31.14 ± 0.42
20	A3P1T2	232.86 ± 2.92	142.60 ± 0.22	4.93 ± 0.22	4.32 ± 0.21	25.88 ± 1.92	23.35 ± 0.99
21	A3P1T3	146.33 ± 2.68	90.33 ± 0.13	4.01 ± 0.09	3.16 ± 0.07	18.92 ± 1.53	14.75 ± 3.63
22	A3P2T1	138.93 ± 5.35	72.90 ± 0.36	3.65 ± 0.09	1.70 ± 0.18	15.99 ± 2.28	9.26 ± 1.10
23	A3P2T2	278.58 ± 2.99	63.84 ± 0.38	5.11 ± 0.33	2.64 ± 0.04	19.48 ± 2.19	10.37 ± 1.09
24	A3P2T3	332.50 ± 1.34	163.73 ± 0.40	5.62 ± 0.09	3.57 ± 0.20	13.84 ± 1.66	11.58 ± 1.29
25	A3P3T1	227.07 ± 0.35	95.02 ± 0.68	4.38 ± 0.13	2.98 ± 0.29	10.46 ± 2.52	9.98 ± 1.07
26	A3P3T2	406.32 ± 1.21	200.44 ± 0.30	6.77 ± 0.11	3.59 ± 0.05	20.72 ± 1.40	5.82 ± 0.55
27	A3P3T3	274.65 ± 1.18	109.74 ± 0.59	4.94 ± 0.28	3.32 ± 0.44	25.18 ± 0.20	10.58 ± 2.33

Coupling agent: A1 = 0.5%; A2 = 0.87%; A3 = 1.23%. Polylactic acid: P1 = 22%; P2 = 25%; P3 = 28%. Temperature profile: T1 = 153.30°C; T2 = 155.75°C; T3 = 158.00°C.