Article Dans Une Revue Polymer Année : 2017

Chemical modification and plasma-induced grafting of pyrolitic lignin.Evaluation of the reinforcing effect on lignin/poly(L-lactide)composites

Résumé

Pyrolitic lignin was modified through two methods. First, it was grafted with polylactide chains via asolvent-free process by ring-opening polymerization of L-lactide using calcium hydride as a catalyst. Theefficiency of grafting was determined by infra-red, nuclear magnetic resonance and time-of-flight secondaryion mass spectrometry analyses. Then, lignin particles were oxygen plasma-treated andimmersed in L-lactide solution. Infra-red and X-ray photoelectron spectroscopy revealed that chainsbearing ester groups similar to that of lactide were covalently grafted onto the lignin. Composite castfilms based on poly(L-lactide) matrix containing ungrafted lignin (lignin/PLLA), chemically-grafted lignincopolymer (PLA-g-lignin/PLLA) and plasma-treated lignin (plasma-treated lignin/PLLA) were investigated.Differential scanning calorimetry and dynamical mechanical analyses revealed that plasmatreatedlignin preserved the crystalline structure of PLLA matrix and had a significant reinforcing effectcompared with lignin and PLA-g-lignin. Results were compared with literature data.

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Dates et versions

hal-01522862 , version 1 (15-05-2017)

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André Mas, Olinda Gimello, Jean Jacques Robin, Joël Couve, Teo Atz Dick. Chemical modification and plasma-induced grafting of pyrolitic lignin.Evaluation of the reinforcing effect on lignin/poly(L-lactide)composites. Polymer, 2017, 118, pp.280-296. ⟨10.1016/j.polymer.2017.04.036⟩. ⟨hal-01522862⟩
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