Synthesis, mechanical properties and enzymatic degradation of biodegradable poly(butylene carbonate-co-terephthalate)/or
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ORIGINAL PAPER
Synthesis, mechanical properties and enzymatic degradation of biodegradable poly(butylene carbonate-co-terephthalate)/ organically modified layered double hydroxide nanocomposites Ming‑Cheng Hsu1 · Jie‑Mao Wang1 · Tzong‑Ming Wu1 Accepted: 3 October 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Two new various compositions of biodegradable aliphatic-aromatic poly(butylene carbonate-co-terephthalate) (PBCT) successfully synthesized through transesterification and polycondensation process were identified using 1H-NMR spectra. A series of PBCT/stearic acid-modified layered double hydroxide (SA-LDH) nanocomposites were fabricated using solution mixing process. The morphology of PBCT/SA-LDH nanocomposites were examined using wide-angle X-ray diffraction and transmission electron microscopy. Both results revealed that the stacking layers of SA-LDH were fully exfoliated into the PBCT polymer matrix. The storage modulus at − 70 °C of PBCT/SA-LDH nanocomposites was greatly improved as compared to that of neat PBCT. The enzymatic degradation of PBCT/SA-LDH nanocomposites was examined using lipase from Pseudomonas sp. The weight loss of PBCT/SA-LDH nanocomposites increases with increasing loading of SA-LDH, recommending that the existence of SA-LDH enhances the degradation of the PBCT copolymers. This result might contribute to the lower degree of crystallinity for PBCT/SA-LDH nanocomposites. The result of MTT assay demonstrates that the PBCT/ SA-LDH composites were appropriate for cell growth and might have a potential application used as biomedical materials. Keywords Biodegradable · Aliphatic-aromatic copolyesters · Composites · Mechanical property · Enzymatic degradation
Introduction The synthetic polymers prepared using petrochemical products are extensively utilized in various arena because they are easy to fabricate and use. Additionally, their wastes were not cautiously handled after use due to their low costs and wide availabilities. Therefore, numerous investigations have aimed at biocompatible and biodegradable polymers for eco-friendly sustainability [1–6]. Biodegradable polymers, such as poly(butylene adipate) (PBA), poly(butylene succinate) (PBS), poly(butylene succinate-co-adipate) (PBSA), poly(butylene adipate-co-terephthalate) (PBAT), and poly(L-lactic acid) (PLLA), have been received considerable research attention from industrial and academic perspectives [7–12]. At present, commercial products of * Tzong‑Ming Wu [email protected] 1
Department of Materials Science and Engineering, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan
PBS (Bionolle™, Showa Highpolymer), PBSA (BioPBS™, Mitsubishi), PBAT (Ecoflex®, BASF), and PLA (Ingeo™, NatureWorks) are immediately available on the market. Specially, the well-known aliphatic–aromatic PBAT synthesized via transesterification and polycondensation had presented their beneficial biodegradability of the aliphatic groups and excellent mechanical properties of the aromatic groups
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