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Research on biodegradable elastomers and their modified polylactic acid

Thermoplastic elastomer (TPE) is a new polymer material that exhibits rubber elasticity at room temperature and can be plasticized at high temperatures. TPE has an obvious two-phase separation structure and excellent mechanical properties and can be widely used in construction, transportation, wire and cable, sealing, food and medical materials, and other fields. The methods for preparing TPE mainly include rubber and plastic blending and chemical synthesis.

Among them, the chemical synthesis method can be designed and regulated from the molecular level and micromorphological structure to meet the performance needs of TPE, such as a thermoplastic polyester elastomer (TPEE) made of polyethylene terephthalate (PBT or PET) as a hard segment and aliphatic polyester or polyether soft segment.

However, at present, most of the raw materials for the preparation of TPE rely on fossil resources, and TPE has shortcomings such as poor biodegradability, and its waste is easy to cause environmental pollution. Therefore, the preparation of biodegradable high-performance TPEs from non-fossil resources is of great significance for the sustainable development of polymer materials, especially for alleviating the crisis of fossil resources and environmental pollution.