Effect of filler type on properties of PBAT/organoclay nanocomposites
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The goal of this study is to evaluate the effect of different organoclays on the properties of poly(butylene adipate-co-terephthalate) (PBAT)/organoclay systems. PBAT/organoclay nanocomposites containing 2.5, 5.0 and 7.5% of three different commercial organically modified clays (Cloisite® C10A, C20A and C30B) were prepared as a masterbatch in a laboratory internal mixer, let down to the appropriate concentration in a co-rotating twin-screw extruder, and test specimens were injection molded. Nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), differential scanning calorimetry (DSC), thermogravimetry (TGA) and dynamic mechanical analysis (DMA) as a function of clay identity and content. XRD results showed a significant increase in the interlayer spacing of the clay, suggesting that intercalated structures were obtained with all systems investigated, as confirmed by TEM. Organoclay incorporation into PBAT resulted in lower melt crystallization temperatures compared with the neat polymer, particularly in PBAT/C30B nanocomposites, slightly improved thermal stability, increased stiffness and no changes in the glass transition temperature. Compounding PBAT with up to 7.5% of C10A, C20A or C30B organoclays is an option to improve the performance of PBAT.
KeywordsPBAT Organoclay Nanocomposites Intercalation
The authors grateful to the Conselho Nacional de Pesquisa (CNPQ-Brazil), Grant #463622/2013-0, to the Coordenação de Aperfeiçoamento do Ensino Superior (CAPES-Brazil) and to the Erasmus Mundus Program for financial support.
- 2.Ray SS, Bousmina M (2005) Biodegradable polymers and their layered silicate nanocomposites. In: Greening the 21st century materials world. Progress in Materials Science, pp 962–1079Google Scholar
- 5.Yamamoto M, Witt U, Skupin G, Beimborn D, Müller RJ (2002) Biodegradable aliphatic-aromatic polyesters: Ecoflex. In: Steinbüchel YDA (ed) Biopolymers—polyesters III—applications and commercial products. Wiley, New York, p 299Google Scholar
- 10.Mondal D, Bhowmick B, Maity D, Mollick MMR, Rana D, Rangarajan V, Sen R, Chattopadhyay D (2015) Investigation on sodium benzoate release from poly(butylene adipate-co-terephthalate)/organoclay/sodium benzoate based nanocomposite film and their antimicrobial activity. J Food Sci 80:602–609CrossRefGoogle Scholar
- 14.Olivares-Maldonado Y, Ramırez-Vargas E, Sánchez-Valdés S, Ramos-DeValle LF, Rodriguez-Fernandez OS, Espinoza-Martınez AB, Medellın-Rodrıguez FJ, Lozano-Ramirez T (2014) Effect of organoclay structure characteristics on properties of ternary PP-EP/EVA/nanoclay blend systems. Polym Compos 35:2241–2250CrossRefGoogle Scholar
- 19.BYK Additives (2018) Cloisite® 10A Nanoclay—Technical Data Sheet. BYK Additives, Cloisite® 20A Nanoclay—Technical Data Sheet. BYK Additives, Cloisite® 30B Nanoclay—Technical Data SheetGoogle Scholar
- 20.Canedo EL, Wellen RMR, Almeida YMB (2016) Cristalização de Polímeros: Tratamento de Dados e Modelagem Macrocinética. ANP—PRH28/UFPE, RecifeGoogle Scholar
- 28.Utracki LA (2004) Clay-containing polymeric nanocomposites. Rapra Technology, ShawburyGoogle Scholar
- 29.Bhattacharya SN, Gupta RK, Kamal MR (2008) Polymeric nano-composites. Hanser, MunichGoogle Scholar
- 30.Wypych George (2016) Handbook of nucleating agents. ChemTec Publishing, TorontoGoogle Scholar