Table 1. Natural polymer materials for biodegradable composites [32-43]

Polymers	Young’s modulus (MPA)	Elongation (%)	Degradation time
Cellulose	20,000~30,000 [32]	5~6 [33]	95% loss in 10 weeks (in fallow soil) [34]
Starch	107.48 [35]	25.625 [35]	36 hours (in Cryptococcus flavs+YPM medium) [36]
Chitosan	110.86~116.54 [37]	3.85~5.93 [37]	50 wt.% loss in 6 hours (in 2 g lysozyme+1 mL PBS, 37°C) [38]
Gelatin	160~260 [39]	12.5~14.58 [39]	9~10 hours (in 0.1 mg lysozyme+1 mL PBS, 37°C) [40]
Beeswax	39 [41]	17-21 [42]	70~75 % loss in 80 days (in CO2 evolution test) [43]