کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1399824 984494 2012 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
New development on plasticized poly(lactide): Chemical grafting of citrate on PLA by reactive extrusion
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
New development on plasticized poly(lactide): Chemical grafting of citrate on PLA by reactive extrusion
چکیده انگلیسی

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 citrate (TbC), were so-carried out through reactive extrusion. TributylO-acetylcitrate (ATbC) was used as a non-functionalized reference. Both plasticizers drastically decreased the Tg of PLA. However, the grafting reaction of TbC into MAG-PLA revealed a shift of PLA Tg toward higher values. After 6 months of aging, no phase separation was observed. However, plasticizer leaching was noticed in the case of PLA/ATbC materials, leading to the shift of Tg toward lower temperatures. In contrast, no major leaching phenomenon was noticed in PLA/TbC and PLA/MAG-PLA/TbC blends, indicating that the mobility restriction derived from the hydrogen bonding that can occur between PLA and TbC as well as the grafting reaction of TbC into MAG-PLA enabled to reduce leaching phenomena.

Figure optionsDownload as PowerPoint slideHighlights
► New poly(lactide) (PLA) plasticization ways based on low molecular plasticizers from citrates family via reactive extrusion.
► In-situ reactive blending performance of anhydride-grafted PLA copolymer with tributyl citrate.
► Effect of the physical aging on the thermal–mechanical properties of plasticized PLA blends.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Polymer Journal - Volume 48, Issue 2, February 2012, Pages 404–415
نویسندگان
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