New development on plasticized poly(lactide): Chemical grafting of citrate on PLA by reactive extrusion
作者： Fatima Hassouna , Jean-Marie Raquez , Frédéric Addiego , Valérie Toniazzo , Philippe Dubois
DOI: 10.1016/J.EURPOLYMJ.2011.12.001
关键词: Copolymer 、 Chemical engineering 、 Poly(lactide) 、 Materials science 、 Reactive extrusion 、 Hydrogen bond 、 Leaching (metallurgy) 、 Composite material 、 Plasticizer 、 Lactide 、 Tributyl citrate
摘要: Abstract New plasticization ways based on low molecular plasticizers from citrates family were investigated to improve the ductility of poly(lactide) (PLA). Grafting reactions between anhydride-grafted PLA (MAG-PLA) copolymer with hydroxyl-functionalized citrate plasticizer, i.e. tributyl (TbC), so-carried out through reactive extrusion. Tributyl O -acetylcitrate (ATbC) was used as a non-functionalized reference. Both drastically decreased T g PLA. However, grafting reaction TbC into MAG-PLA revealed shift toward higher values. After 6 months aging, no phase separation observed. plasticizer leaching noticed in case PLA/ATbC materials, leading lower temperatures. In contrast, major phenomenon PLA/TbC and PLA/MAG-PLA/TbC blends, indicating that mobility restriction derived hydrogen bonding can occur well enabled reduce phenomena.
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