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Biobased polymer derived from the biomass or issued from monomers derived from the biomass and which, at some stage in its processing into finished products, can be shaped by flow. Note 1: Bioplastic is generally used as the opposite of polymer derived from fossil resources.
Another class of biocomposite is called 'hybrid biocomposite', which is based on different types of fibers into a single matrix. The fibers can be synthetic or natural, and can be randomly combined to generate the hybrid composites. Its functionality depends directly on the balance between the good and bad properties of each individual material ...
Second, engineering issues. Biodegradable polymers are mostly plant-base materials, which means they originally come from organic source like soybean or corn. These organic plants have the chance to be sprayed with pesticides which contain chemicals which can contaminate the crops and be transferred into the final finished product.
Biologically-based polymers, sourced from non-fossil materials, can decompose naturally in the environment, whereas some plastics products made from biodegradable polymers require the assistance of anaerobic digesters or composting units to break down synthetic material during organic recycling processes. [40] [14]
Pro-oxidant additives have been effective in increasing the biodegradability of polyethylene by creating smaller fragments of the polymer. [11] Typical pro-oxidant additives are the transition metal complexes or transient metal ions, which are added to the plastic in the form of stearate or other organic ligand complexes.
Most plastics contain organic polymers. [12] The vast majority of these polymers are formed from chains of carbon atoms, with or without the attachment of oxygen, nitrogen or sulfur atoms. These chains comprise many repeating units formed from monomers. Each polymer chain consists of several thousand repeating units.
Biopolymers can be sustainable, carbon neutral and are always renewable, because they are made from plant or animal materials which can be grown indefinitely. Since these materials come from agricultural crops, their use could create a sustainable industry. In contrast, the feedstocks for polymers derived from petrochemicals will eventually ...
Bio-based materials are often biodegradable, but this is not always the case.. By definition, biodegradable materials are formed or organic compounds which can thus be broken down by living organisms, such as bacteria, fungi, or water molds, and reabsorbed by the natural environment.