In situ functionalization of poly(butylene adipate- co -terephthalate) polyester with a multi-functional macromolecular
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ORIGINAL RESEARCH
In situ functionalization of poly(butylene adipate‑co‑terephthalate) polyester with a multi‑functional macromolecular additive Denial Mahata1 · Amal Cherian1 · Anant Parab1 · Virendrakumar Gupta1 Received: 18 March 2020 / Accepted: 15 August 2020 © Iran Polymer and Petrochemical Institute 2020
Abstract Poly(butylene adipate-co-terephthalate) (PBAT) has been functionalized with Pluronic F127 as a secondary diol monomer by melt polycondensation. The variation of Pluronic content to max 12.2 wt% in the copolymer is investigated on microstructure analysis, molecular weight distribution, thermal properties, crystallinity, and thermo-responsive behavior. The microstructure in the Pluronic F127-functionalized PBAT (PPBAT) copolymer indicates that the amount of Pluronic unit which is attached to the PPBAT copolymers found to be increased from 5.9 to 9.1 to 12.2% (wt) with the feeding amount of 1.0 to 2.0 to 3.0 mmol, respectively. The weight average molecular weight has also found to increase from 23,555 to 43,841 g/ mol in the PPBAT copolymers. The lowering of glass transition temperature has been also observed in the thermal analysis that indicates the improvement of the plasticization effect in the PPBAT copolymers with the increase of Pluronic from 0 to 12.2% (wt). Moreover, the crystallization behavior also indicates the disappearance of crystallization temperature and the appearance of cold crystallization temperature before melting with the increase of Pluronic content. The X-ray diffraction analysis further signifies the decrease in degree of crystallinity with an increase of Pluronic in PPBAT copolymers. The PPBAT copolymers display thermo-responsive behavior under physiological conditions due to the attachment of Pluronic comonomer onto the structural backbone. Keywords Polycondensation · PBAT copolyester · Pluronic F127 · Plasticization effect · Thermo-responsive properties
Introduction The rapid increase of global warming in the last decade has posed a major concern to prevent the environmental pollution caused by the emission of greenhouse gases from non-degradable plastics [1, 2]. Aliphatic polyesters are the major class of biodegradable polymers, such as poly(lactic acid) (PLA), poly(caprolactone) (PCL), poly(butylene succinate) (PBS), poly(3-hydroxy butyrate) (PHB), poly(glycolic acid) (PGA), and so on [3–5]. They are widely used in highperformance applications from engineering to healthcare material, such as textile, packaging, tissue engineering, and Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13726-020-00860-2) contains supplementary material, which is available to authorized users. * Virendrakumar Gupta [email protected] 1
Polymer Synthesis and Catalysis Group, Reliance Research and Development Center, Reliance Industries Limited, Ghansoli, Navi Mumbai 400701, India
drug delivery [6–8]. Poly(butylene adipate-co-terephthalate) (PBAT) is a fully biodegradable aliphatic–aromatic polyester, chemically composed of t
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