Poly Butylene Adipate-Co-Terephthalate Instruction:

Poly butylene adipate-co-terephthalate is a well-known aliphatic-aromatic biodegradable random copolyester structurally composed of the chemical units butylene adipate. PBAT can be synthesized by polycondensation reactions in the melt phase. However, the synthesis process is very complex as PBAT requires high esterification temperatures.

In addition, the synthesis process is associated with various side reactions such as depolymerization and hydrolytic degradation, color of the polymer, and formation of tetrahydrofuran. This short literature review deals with the development of various methods for the synthesis of poly butenedioic acid-terephthalic acid on a commercial scale. Different grades of synthesis using chain extenders, branching agents, chemical functionalization and in situ incorporation of nanocomposites are also investigated.

PBAT Description:

PBAT is a thermoplastic biodegradable plastic, which is a copolymer of butylene glycol adipate and butylene glycol terephthalate. PBAT has the characteristics of both PBA and PBT, good ductility and elongation at break, as well as good heat resistance and impact properties; in addition, PBAT has excellent biodegradability.

PBAT is a semi-crystalline polymer, usually with a crystallization temperature around 110°C and a melting point around 130°C. The density of PBAT is between 1.18g/ml and 1.3g/ml. The crystallinity of PBAT is about 30% and the Shore hardness is above 85. PBAT is a copolymer of aliphatic and aromatic, combining the excellent degradation properties of aliphatic polyesters and the good mechanical properties of aromatic polyesters. The processing performance of PBAT is very similar to that of LDPE and can be blown with LDPE processing equipment.

Polybutylene terephthalate (PBAT), also known as polybutylene glycol butyrate, is a semi-aromatic, biodegradable thermoplastic copolyester that can be easily molded and thermoformed. PBAT is a random copolymerization of 1,4-butanediol, adipic acid, and dimethyl terephthalate (DMT) monomers.PBAT has many attractive properties similar to those of Hpolyethylene. For example, PBAT has a relatively high elongation at break (30-40%) and moderately high impact and puncture toughness, but only moderate tensile strength and low hardness.