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Abstract
The easy hydrolysis of poly(lactic acid) (PLA) leads to very poor mechanical stability. In order to improve water-resistance of PLA, fluorinated polymer has been chosen for its extremely low surface energy. Besides, n-butyl acrylate (BA) has been introduced into fluorinated polymer by copolymerizing BA with dodecafluorheptylmethylacrylate (FA) to enhance the compatibility of fluorinated polymer and PLA. The bulk and surface properties of PLA/fluorinated polymers blends have been studied. The results show that the compatibility of PLA and fluorinate polymers has been improved by BA and, more importantly, the hydrophobicity of PLA has increased obviously by blending with the fluorinate polymers.
Notes
BAtheo, the theoretical content of BA; BANMR, the BA content calculated from 1H NMR spectra; BAEA, the BA content determined by carbon elemental analysis.
To, onset decomposition temperature; Tf, the fastest decomposition temperature; Tc, complete decomposition temperature.
a
γs surface energy, dispersive component,
polar component.
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