Nanocomposites of PBAT and cellulose nanocrystals modified by in situ polymerization and melt extrusion

Polymer Engineering and Science - Tập 56 Số 12 - Trang 1339-1348 - 2016
Carolina Lipparelli Morelli1,2, Mohamed Naceur Belgacem1, Márcia Cristina Branciforti3, Marie Christine Salon1, Julien Bras1, Rosário E. S. Bretas2
1Grenoble INP Pagora—LGP2 (UMR 5518 CNRS) 461 Rue De La Papeterie Saint Martin D'Hères CS 10065 38402 France
2Materials Engineering Department Federal University of São Carlos (UFSCar) Km 235 Washington Luís Road 13565‐905 São Carlos SP Brazil
3Materials Engineering Department University of São Paulo (USP) 1100 João Dagnone Avenue São Carlos SP 13563‐120 Brazil

Tóm tắt

Cellulose nanocrystals (CNC) were successfully grafted with a low molecular weight poly(butylene glutarate) through an in situ polymerization procedure. The grafting treatment decreased the CNC hydrophilic character and increased the onset of their thermal degradation by approximately 20°C, thus increasing the possibilities of CNC application. Composites of grafted and nongrafted CNC with a poly(butylene‐adipate‐co‐terephthalate) (PBAT) matrix were prepared by melt extrusion. The CNC addition led to an increase of 50% of the tensile elastic modulus of the PBAT. In addition, dynamic mechanical thermal analysis showed that the composite with CNC retained its high modulus even at temperatures far above the glass transition temperature of PBAT. At 60°C the storage modulus of the composite with CNC was approximately 200% higher than that of the pure PBAT. Thus, in this work, nanocomposites of improved properties were obtained through a combination of in situ polymerization and melt extrusion. POLYM. ENG. SCI., 56:1339–1348, 2016. © 2016 Society of Plastics Engineers

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Thông tin xuất bản

Polymer Engineering and Science

Tập 56 Số 12

1339-1348

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