CHAPTER II
MATERIALS AND METHODS
49
4.4.2 Mathod
Biodegradable behavior of bioplastics can be determined using soil burial degradation test. The
extent of damage of bioplastics can be analyzed using degradation percentage. The prepared
bioplastics were weighed. Then the samples were buried into the ground. The degradation rate
of samples was calculated from the weight loss of the sample over time. The final mass of
samples was measured after 7 days. The degradation of the test samples was calculated as in
Equation 1 (Vasile et al., 2018).
𝐷𝑒𝑔𝑟𝑎𝑑𝑎𝑡𝑖𝑜𝑛 (%) =
𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝑤𝑒𝑖𝑔ℎ𝑡−𝑓𝑖𝑛𝑎𝑙 𝑤𝑒𝑖𝑔ℎ𝑡 × 100
(1)
𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝑤𝑒𝑖𝑔ℎí µí4.5 Elongation test
4.5.1 Material
• Bioplastic
• Ruler
Figure 62: bioplastic buried in the soil