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The increase of thermal and mechanical properties for the sample PBS_1, for which the highest mass loss was observed, could be attributed to the breakage of side chains in polymer and structural evolution on supramolecular level.	Bruce 2024-12-1	027	Bruce 2024-12-1 07:50
The changes in the thickness of the tested polymer over time were described by a kinetic model.	Bruce 2024-12-1	026	Bruce 2024-12-1 07:49
However, for samples PLA_1 and PLA_2 mass loss was insignificant and equal to 0.23 and 0.57 %, respectively.	Bruce 2024-12-1	024	Bruce 2024-12-1 07:49
In the next 6 months of degradation, when temperature was higher, mass loss was observed mainly for the sample PBS_1 and after 12 months of degradation was equal to 4.3 %.	Bruce 2024-12-1	028	Bruce 2024-12-1 07:49
Low air temperature in the first 6 months of degradation caused that mass loss for all samples was low and below 0.35 %.	Bruce 2024-12-1	019	Bruce 2024-12-1 07:49
The greatest surface erosion was observed for the sample PBS_1.	Bruce 2024-12-1	020	Bruce 2024-12-1 07:49
However, after 12 months of degradation erosion of surface samples was visible for all samples.	Bruce 2024-12-1	018	Bruce 2024-12-1 07:48
Using microscopic observation no erosion of the surface samples after 6 months was visible for all samples.	Bruce 2024-12-1	020	Bruce 2024-12-1 07:48
Macroscopic examination of the samples after 12 months showed that color changes on the film surface appeared only for the sample PBS_1.	Bruce 2024-12-1	023	Bruce 2024-12-1 07:48
During the first six months of soil burial tests the average air temperature was equal to 3.4 ��C, than between 7 and 12 months, average air temperature increased to 15.4 ��C.	Bruce 2024-12-1	020	Bruce 2024-12-1 07:48
Research carried out in this study indicate that the biodegradation process of bio-based plastic materials in field soil under natural conditions was slow because average temperature of the ambient air was low.	Bruce 2024-12-1	022	Bruce 2024-12-1 07:48
Moreover, the sample is isotropic in terms of mechanical properties not only before but also after degradation.	Bruce 2024-12-1	0222	Bruce 2024-12-1 07:47
In this case, all the values of the measured parameters increased except for the elongation.	Bruce 2024-12-1	025	Bruce 2024-12-1 07:47
Tested materials exhibit the ability to fragmenting and lose their primary mechanical properties.	Bruce 2024-12-1	019	Bruce 2024-12-1 07:47
The statistical analysis showed that the only significant changes result from a degradation process.	Bruce 2024-12-1	027	Bruce 2024-12-1 07:47
Other changes were observed mainly in the MD where the increase of tensile modulus and tensile strength at yield was significant according to statistical analysis, while the tensile at break shown a significant decrease.	Bruce 2024-12-1	020	Bruce 2024-12-1 07:46
The main significant changes in mechanical parameters were observed for the elongation at break where the value strongly decreased from the 315 % to 85 %, and from 98 % to 33 % in MD and TD directions, respectively.	Bruce 2024-12-1	022	Bruce 2024-12-1 07:46
In the period between the 6th and 12th month of degradation, which is the summer time in Poland, the average monthly air temperature was above 11 ��C.	Bruce 2024-12-1	025	Bruce 2024-12-1 07:46
During this experimental period, the average monthly air temperature was below 11 ��C, and the sum of monthly precipitation, except for the first month, was below 33 mm.	Bruce 2024-12-1	026	Bruce 2024-12-1 07:46
The very low level of degradation of the tested polymers was mainly due to the prevailing environmental conditions.	Bruce 2024-12-1	026	Bruce 2024-12-1 07:46

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