Biodegradable plastics are plastics produced by biomass as raw materials, which can reduce the consumption of traditional energy sources such as petroleum, mainly including PLA (polylactic acid), PHA (polyhydroxyalkanoate), PGA(polyglutamic acid) and so on. Petroleum-based degradable plastics are plastics produced from fossil fuels, mainly including PBS (polybutylene succinate), PBAT (polyadipic acid/butylene terephthalate), PCL (polycaprolactone) and so on. Today we are going to talk about PBS.
Poly (Butylene Succinate) (PBS) is a thermoplastic polymer resin of the polyester family. PBS is a biodegradable aliphatic polyester whose properties are comparable to polypropylene.
PBS class polyester is a kind of aliphatic polyester synthesized by polycondensation reaction with aliphatic diacid and diol as raw materials, and its representative PBS is synthesized with succinic acid and butanediol as raw materials.
In the 1990s, a polymer company first used isocyanate as a chain extender, reacted with low molecular weight polyester synthesized by polycondensation reaction with diol diacid, and prepared high molecular weight polymer, and PBS polyester began to attract wide attention as a new biodegradable plastic.
China’s PBS research began in the early 21st century, the main research units are National Engineering Research Center of Engineering Plastics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Tsinghua University, Sichuan University, etc. Uniong opened its polymer plant in 2016, and its business scope covers research and development, production and sales of daily chemical raw materials, biodegradable materials and 3D printing materials. The development and research of PBS also began at this time.
As PBS decomposes into water and CO2 through naturally occurring degrading enzymes and microorganisms, it may be a biodegradable alternative to some common plastics.
PBS can be used as garbage bags, packaging bags, cosmetic bottles, various plastic cards, baby diapers, agricultural materials and drug slow-release carrier matrix; There are other plastic products related to environmental protection, such as civil greening nets, membranes and so on. It can be used in packaging, tableware, cosmetic bottles and medicine bottles, disposable medical supplies, agricultural films, pesticide and fertilizer slow-release materials, biomedical polymer materials and other fields. The raw material of PBS can be either traditional energy or biomass, which is rich in sources and has a very broad application prospect.
Due to the superior characteristics of PBS materials and the impact of the plastic ban, the market price of PBS in China has risen significantly. PBS is a new biodegradable polymer, which has a broad application prospect. In addition, it is also considered one of the top choices for biopolymers due to its environmental friendliness and biodegradability. Despite the various advantages of PBS, its brittleness, thermal stability, and lack of high molecular weight required for industrial applications limit its commercial application. Different catalyst systems are used to produce high molecular weight PBS. In addition, various strategies, such as copolymerization and preparation of composites and blends, have been tried to improve the physical and mechanical properties of PBS. However, synthesizing high molecular weight PBS with enhanced properties remains a challenging task.