کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1398273 | 984352 | 2012 | 10 صفحه PDF | دانلود رایگان |
Telechelic acrylic poly(lactic acid) (PLA) oligomers were synthesized from the transesterification of PLA with ethylene glycol diacrylate. The oligoesters were characterized by 1H NMR and GPC. The telechelic acrylic PLA oligomers were then formulated with four different reactive diluents and photopolymerized into films with photoinitiator Irgacure 2959. Films were formulated to contain either 1,4-butanediol dimethacrylate (BDDM) or triethylene glycol dimethacrylate (TEGDMA) and for each set of formulations the concentration of PLA was varied from 0 to 70 wt.%. The kinetics of the photopolymerizable material was studied by photo-differential scanning calorimeter (DSC). Physical properties were evaluated using pencil hardness, reverse impact resistance, pull off adhesion, solvent resistance, and dynamic mechanical thermal analysis (DMTA) properties. The Photo-DSC results showed that the reaction rate decreased as the PLA concentration increased. Films containing lower concentrations of PLA were harder and less flexible.
Figure optionsDownload as PowerPoint slideHighlights
► Telechelic acrylic PLA oligomers photopolymerized with reactive diluents.
► Film properties dependent on concentration and choice of reactive diluent.
► Change of reactive diluent is simple method to achieve a wide range of properties.
Journal: European Polymer Journal - Volume 48, Issue 12, December 2012, Pages 2107–2116