Details

Autor(en) / Beteiligte

• Choi, Kyung-Man
• Lim, Sung-Wook
• Choi, Myeon-Cheon
• Kim, Young-Min
• Han, Dong-Hun
• Ha, Chang-Sik

Titel

Thermal and mechanical properties of poly(lactic acid) modified by poly(ethylene glycol) acrylate through reactive blending

Ist Teil von

• Polymer bulletin (Berlin, Germany), 2014-12, Vol.71 (12), p.3305-3321

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Poly(lactic acid) (PLA) was modified using a simple reactive blending method, where a low molecular weight poly(ethylene glycol) acrylate (PEGA) was blended with PLA in the presence of a radical initiator. To examine the initiation effect on the modification of PLA, various amounts of radical initiator (between 0 and 1.5 %) were added to the PLA/PEG acrylate mixture. The modified PLAs (PLMs) were characterized by gel permeation chromatography, Fourier transform infrared spectroscopy, wide-angle X-ray diffraction, and solvent extraction. The properties of the PLMs were investigated using tensile testing, differential scanning calorimetry, thermogravimetric analysis, scanning electron microscopy, and hydrolytic degradable analysis. The PEGA significantly influenced the molecular structure and properties of the modified PLA. The glass transition temperature of the PLMs was decreased by approximately 15 °C (for PLM15) from 59.3 °C of PLA, whereas their toughness increased considerably compared to PLA. In addition, PEG acrylate facilitates hydrolytic degradation, even after radical polymerization by reactive blending.