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Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications. It is produced via chain-growth polymerization from the monomer propylene. Polypropylene belongs to the group of polyolefins and is partially crystalline and non-polar.
The petrochemical industry has been trying to save itself by attempting to rapidly expand demand for plastic products worldwide (i.e. through pushbacks on plastic bans and by increasing the number of products wrapped in plastic in countries where plastic use is not already as widespread (i.e. developing nations)). [5]
Plastic is the generic name for a family of synthetic materials derived from petrochemicals. It is often product of two or more components. There are many families of plastics and polymers being used in construction industry, such as acrylics, composites, expanded polystyrene, polycarbonates, polyethylene, polypropylene, and polyvinyl chloride.
Polypropylene sheets are used for stationery folders and packaging and clear storage bins. Polypropylene is defined by the recyclable plastic number 5. Although relatively inert, it is vulnerable to ultraviolet radiation and can degrade considerably in direct sunlight. Polypropylene is not as impact-resistant as the polyethylenes (HDPE, LDPE).
The plastic kits and covers are mostly made of synthetic polymers like polythene, and tires are manufactured from polybutadienes. [1] However, due to the environmental issues created by these synthetic polymers which are mostly non-biodegradable and often synthesized from petroleum, alternatives like bioplastics are also being considered.
Additives present risks in recycled products due to their difficulty to remove. When plastic products are recycled, it is highly likely that the additives will be integrated into the new products. Plastic waste, even if it is all of the same polymer type, will contain varying types and amounts of additives.