Polylactide stereocomplexation leads to higher hydrolytic stability but more acidic hydrolysis product pattern.
作者： Sofia Regnell Andersson , Minna Hakkarainen , Saara Inkinen , Anders Södergård , Ann-Christine Albertsson
DOI: 10.1021/BM100029T
关键词: Degradation (geology) 、 Hydrolysis 、 Biodegradation 、 Product pattern 、 Crystallinity 、 Mass spectrometry 、 Chemical engineering 、 Chemistry 、 Absorption of water 、 Polymer chemistry 、 Electrospray
摘要: Poly-l-lactide/poly-d-lactide (PLLA/PDLA) stereocomplex had much higher hydrolytic stability compared to plain PLLA, but at the same time shorter and more acidic degradation products were formed. Both materials subjected in water phosphate buffer 37 60 °C, processes monitored by following mass loss, uptake, thermal properties, surface changes, pH of aging medium. The product patterns determined electrospray ionization-mass spectrometry (ESI-MS). high crystallinity strong secondary interactions prevented uptake resulted lower loss rate. However, somewhat surprisingly, medium decreased faster case PLLA/PDLA stereocomplex. In accordance, ESI-MS results showed that hydrolysis products. This could be explained increased intermolecular crysta...
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