Natural Fibre-Reinforced Biofoams

Table 14

PLA-foams tensile properties as a function if the chemical blowing agent content (CBA1) (PLA 7000D temperature profile A and PLA 4032D temperature profile B; screw speed 30 rpm; die temperature 195°C; free cooling)—𝜎_max: yield stress, 𝜀_max: elongation at yield stress, 𝜎_𝑟: ultimate stress, 𝜀_𝑟: ultimate elongation—( ): standard deviation.

PLA	CBA1 (wt%)	Void fraction (%)	𝜎max (MPa)	𝜀max (%)	𝜎𝑟 (MPa)	𝜀𝑟 (%)
	0	—	60.51 (1.58)	10.33 (0.94)	57.34 (1.36)	11.12 (0.86)
7000D	2	42 (1)	36.00 (2.84)	8.41 (0.32)	33.38 (2.18)	9.95 (0.71)
	3	45 (1)	25.65 (1.33)	8.84 (0.39)	21.51 (1.72)	11.59 (0.92)
	4	47 (1)	23.71 (0.90)	8.37 (0.55)	20.49 (1.08)	10.28 (1.16)
	0	—	59.51 (2.26)	9.40 (0.42)	54.61 (4.99)	10.19 (0.61)
4032D	2	34 (1)	40.54 (3.27)	10.24 (0.89)	37.91 (3.90)	11.51 (1.23)
	3	41 (1)	30.68 (2.40)	8.61 (0.70)	27.14 (3.44)	10.43 (1.11)
	4	48 (1)	26.77 (1.24)	9.44 (1.36)	22.87 (1.12)	11.50 (1.60)