己二酸
聚丁二酸丁二醇酯
降级(电信)
化学
高分子化学
计算机科学
电信
作者
Adchara Padermshoke,Yingjun An,Tomoko Kajiwara,Hiroyasu Masunaga,Yutaka Kobayashi,Hiroshi Ito,Sono Sasaki,Hiroshi Noguchi,Atsushi Kusuno,Atsushi Takahara
摘要
Abstract Two biodegradable polyesters, poly(butylene succinate) (PBS) and poly(butylene succinate‐ co ‐adipate) (PBSA), were artificially aged in a UV irradiation test chamber, and their photodegradation behaviors investigated. The attenuated total reflection (ATR) infrared (IR) spectra of the initial and UV‐aged samples revealed conformational changes in the tetramethylene sequences of the photoaged PBS and PBSA. The one‐dimensional wide‐angle X‐ray scattering (WAXS) profiles showed that the (110) d‐spacing of the α ‐form crystal progressively decreased during UV aging, suggesting that the crystalline polymer chains became arranged more closely along the fiber axis. Accordingly, we conclude that PBS and PBSA transform from their TGTGT to nearly TTTTT conformations upon photoaging. The observed WAXS, small‐angle X‐ray scattering, and IR spectral data suggest that photodegradation preferentially occurs in the amorphous phase of each polymer. The less crystallizable butylene adipate co‐unit enhances the degradability of PBSA, with prolonged photooxidation leading to partial degradation of the crystalline region of the copolymer. This finding is consistent with and may be linked to the higher biodegradability of PBSA compared to PBS.
科研通智能强力驱动
Strongly Powered by AbleSci AI