Kang JH, Sim SJ, Lee JH, Lee S, Suh DH. Bio-Degradable Polyesters with Rigid Cyclic Diester from Camphor and Tartaric Acid.
JOURNAL OF POLYMERS AND THE ENVIRONMENT 2022;
30:3463-3473. [PMID:
35469316 PMCID:
PMC9020547 DOI:
10.1007/s10924-022-02439-9]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 03/17/2022] [Indexed: 06/01/2023]
Abstract
Despite their excellent, useful, and stable properties, thermoplastics are constantly subject to environmental risks because of their low degradability under thermal, chemical, and mechanical stresses. To overcome the aforementioned issues, we hereby introduce an eco-friendly camphor (Ct) cyclic diester. The Ct diester is designed as a monomer, including a ketal group from the Ct, and shows high thermal stability via a rigid spiro-ring and a bridged bicyclic structure. A series of polyester was synthesized using the Ct diester, including various types of diols and dimethyl terephthalate. PETxCty copolyesters showed appropriate thermal stability up to 414 °C and a high glass transition temperature. This thermal behavior led to amorphous regions as the Ct diester content increased. Regarding the proportion of the Ct diester in the polyester, it was sensitive to hydrolysis and contributed to the degradation of the polyester in acid buffer conditions.
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