. . "RIV/70883521:28610/13:43869807!RIV14-MSM-28610___" . "Influence of natural inorganic impurity on the synthesis of poly(L -lactic acid), properties and nanofabrication" . "Sedla\u0159\u00EDk, Vladim\u00EDr" . . "[DC12BEB41325]" . "biodegradable||nanocrystals||nanoparticles||nanowires||polycondensation||polyesters"@en . "Urb\u00E1nkov\u00E1, Miroslava" . . "Influence of natural inorganic impurity on the synthesis of poly(L -lactic acid), properties and nanofabrication"@en . "0021-8995" . . . . "79851" . . "5"^^ . "Influence of natural inorganic impurity on the synthesis of poly(L -lactic acid), properties and nanofabrication" . "http://onlinelibrary.wiley.com/doi/10.1002/app.39017/pdf" . "RIV/70883521:28610/13:43869807" . "This work is focused on determination of the effect of a calcium-based inorganic impurity originating from biotechnological L-lactic acid production from cheese whey on the synthesis of poly(L-lactic acid). The influence of the impurity was investigated in the range of 0 to 1 wt % and the product properties were studied by analytical techniques GPC, FTIR-ATR, acid end group analysis and DSC. The final product was used to prepare submicron particles, which were analyzed by dynamic light scattering and electron microscopy. Results show a moderate reduction in molecular weight in connection with an increase in the amount of the impurity up to 0.75 wt %. Further increase in the concentration of the impurity caused decomposition. Investigating the thermal properties reveals a noticeable reduction in the melting temperature and a slight decrease in glass transition temperature. The prepared submicron particles had a Z-average diameter of between 280 and 520 nm, depending on the emulsifying system, and the presence of the inorganic impurity seems to play no role during particle formation." . "5"^^ . "US - Spojen\u00E9 st\u00E1ty americk\u00E9" . . "Koutn\u00FD, Marek" . "28610" . "1" . . "Stloukal, Petr" . "Journal of Applied Polymer Science" . "This work is focused on determination of the effect of a calcium-based inorganic impurity originating from biotechnological L-lactic acid production from cheese whey on the synthesis of poly(L-lactic acid). The influence of the impurity was investigated in the range of 0 to 1 wt % and the product properties were studied by analytical techniques GPC, FTIR-ATR, acid end group analysis and DSC. The final product was used to prepare submicron particles, which were analyzed by dynamic light scattering and electron microscopy. Results show a moderate reduction in molecular weight in connection with an increase in the amount of the impurity up to 0.75 wt %. Further increase in the concentration of the impurity caused decomposition. Investigating the thermal properties reveals a noticeable reduction in the melting temperature and a slight decrease in glass transition temperature. The prepared submicron particles had a Z-average diameter of between 280 and 520 nm, depending on the emulsifying system, and the presence of the inorganic impurity seems to play no role during particle formation."@en . "000321305500007" . . . "10.1002/app.39017" . "130" . . "Kucharczyk, Pavel" . "7"^^ . . . . "P(ED2.1.00/03.0111), S" . . . "Influence of natural inorganic impurity on the synthesis of poly(L -lactic acid), properties and nanofabrication"@en . .