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Life cycle analysis studies show that some bioplastics can be made with a lower carbon footprint than their fossil counterparts, for example when biomass is used as raw material and also for energy production. However, other bioplastics' processes are less efficient and result in a higher carbon footprint than fossil plastics.
There is also much debate about the total carbon, fossil fuel and water usage in manufacturing biodegradable bioplastics from natural materials and whether they are a negative impact to human food supply. To make 1 kg (2.2 lb) of polylactic acid, the most common commercially available compostable plastic, 2.65 kg (5.8 lb) of corn is required. [57]
NatureWorks LLC is an international company that manufactures bioplastics—polymers derived entirely from plant resources—as an alternative to conventional plastic, which is made from petroleum. The commercial quality polymer is made from the carbon found in simple plant sugars such as corn starch to create a proprietary polylactic acid ...
While most plastics are produced from petrochemicals, bioplastics are made substantially from renewable plant materials like cellulose and starch. [24] Due both to the finite limits of fossil fuel reserves and to rising levels of greenhouse gases caused primarily by the burning of those fuels, the development of bioplastics is a growing field.
Thermal analysis is a useful method for characterizing the effects of degradation on the physical properties of polymers. Information about the thermal stability and the kinetic parameters of thermal decomposition can be obtained through thermogravimetric analysis.
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Polybutylene succinate (PBS) (sometimes written polytetramethylene succinate) is a thermoplastic polymer resin of the polyester family. PBS is a biodegradable aliphatic polyester with properties that are comparable to polypropylene.
Finally, an answer to a mystery surrounding these 1,000-year-old trees. Tom Page, CNN. June 24, 2024 at 4:13 AM. ... The giant trees, swollen of trunk and stubby of canopy, are unmistakable ...