ABSTRACT

　In this study, the author developed a novel flexible and biodegradable material by blending chitosan （CS） with a specially modified copolymer of poly （trimethylene carbonate）（PTMC）．To improve interactions within the blend, N-methyl-Dglucamine?functioning as a polyol?was grafted onto the PTMC copolymer, resulting in poly （TMC-co-TMC-glucamine）（PTTG）．This modification was designed to enhance hydrogen bonding between components. The CS/PTTG blend films were then prepared via solvent casting. To evaluate the chemical interactions and thermal properties of these materials, Fourier-transform infrared spectroscopy （FT-IR） and thermogravimetric analysis （TGA） were performed. The results showed noticeable shifts in wavenumber and a reduction in the temperature at which 10% weight loss occurred （T10）， indicating changes in chemical structure and thermal stability. In terms of mechanical performance, the addition of PTTG significantly enhanced the material? s strength and flexibility. The tensile strength increased to 16.0±2.6 MPa in the formulation containing 75% CS and 25% PTTG （CS75PTTG25）．Flexibility was also improved, reaching up to 55.9±6.6 MPa in a simple blend containing CS, the PTMC copolymer, and N-methyl-D-glucamine. The study also presents a detailed

DECENTE SPORTS SCIENCE Vol.47/The DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE