Novel biodegradable aliphatic copolyesters based on poly(butylene succinate) containing thioether-linkages for sustainable food packaging applications

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• 作者：Laura Genovese^a ; Nadia Lotti^a ; ^{nadia.lotti@unibo.it" class="auth_mail" title="E-mail the corresponding author} ; Massimo Gazzano^b ; Valentina Siracusa^c ; Marco Dalla Rosa^d ; Andrea Munari^a
• 关键词：Poly(butylene succinate) ; Random copolymers ; Solid-state properties ; Biodegradable polymers
• 刊名：Polymer Degradation and Stability
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：132
• 期：Complete
• 页码：191-201
• 全文大小：1993 K

文摘

Poly(butylene succinate) (PBS) based random copolyesters containing thioether-linkages were synthesized by melt polycondensation, and characterized from the molecular and thermo-mechanical point of view. Permeability to O₂ and CO₂ gases and biodegradation rate in compost have been also evaluated. The synthesized semicrystalline copolymers have proved to be thermally stable and characterized by PBS crystal phase. The main effect of copolymerization was a lowering in the crystallinity degree and a decrease of T_m with respect to homopolymer. The dependence of T_m on composition was described by Baur's equation. Slightly different surface hydrophilicity has been also displayed. Mechanical properties and the biodegradation rate turned out to be deeply influenced by the copolymers composition, in particular the higher the thiodiethylene glycol mol% the higher the elongation at break and the biodegradation extent. It is worth mentioning that the synthesized copolymers displayed better barrier properties to both studied gases with respect to commercial Poly(lactic acid).