Details

Autor(en) / Beteiligte

• Lin, Wangyang
• He, Yue
• Qu, Jin‐Ping

Titel

Super‐Tough and Highly‐Ductile Poly(l‐lactic acid)/Thermoplastic Polyurethane/Epoxide‐Containing Ethylene Copolymer Blends Prepared by Reactive Blending

Ist Teil von

• Macromolecular materials and engineering, 2019-06, Vol.304 (6), p.n/a

Ort / Verlag

Weinheim: John Wiley & Sons, Inc

Erscheinungsjahr

2019

Quelle

Wiley Online Library

Beschreibungen/Notizen

• Ethylene‐methyl acrylate‐glycidyl methacrylate copolymer (E‐MA‐GMA) is employed to improve the impact toughness of poly(l‐lactic acid) (PLLA)/thermoplastic polyurethane (TPU) blends by reactive melt‐blending. The reaction and miscibility between the components are confirmed by Fourier transform infrared spectroscopy, dynamic mechanical analysis, and differential scanning calorimetry. A super‐tough PLLA/TPU/E‐MA‐GMA multiphase blend (75/10/15) exhibits a significantly improved impact strength of 77.77 kJ m−2, which is more than 17 times higher than that of PLLA/TPU (90/10) blend. A co‐continuous‐like TPU phase structure involving E‐MA‐GMA phase at the etched cryo‐fractured surface and the high‐orientated matrix deformation at the impact‐fractured surface are observed by scanning electron microscopy. The high‐orientated matrix deformation induced by the co‐continuous TPU phase structure is responsible for the super toughness of PLLA/TPU/E‐MA‐GMA blends. The poly(L‐lactic acid) (PLLA)/thermoplastic polyurethane (TPU)/ethylene‐methyl acrylate‐glycidyl methacrylate blends with super‐high toughness and excellent ductility are achieved by reactive melt‐blending in this work. The reactive mechanism and toughening mechanism in the blends are presented by characterizations subsequently. This work provides an effective and facile method to fabricate PLLA‐based materials filled by TPU that are super tough and have excellent ductility.