biodegradable polymer

The paper considers the possibility of creating a combined injection drug prolonged action based on naltrexone and disulfiram by encapsulation method. Polymers of poly-D, L-lactide-co-glycolide lactic acid were selected as adjuvant. Optimal method of process was developed based on the analysis of the literature, patent research and experimental data. Spheres of micro-and nano- sizes based on naltrexone and disulfiram as a powder for use as an injection were obtained. 

In this work 20 new biogegradable materials from polyethylene and lignocellulosic fillers were examined. The samples with and without compatibilizer were compared. This work contains four different methods of investigation: TGA, microscopy, thermal oxidation, biodegradation in soil.

Malva fiber was submitted to alkali treatments with NaOH aqueous solutions at different concentrations, times and temperatures. Fiber samples were analyzed before and after treatments to study their effects on crystallinity, thermal stability and morphology. The results showed that the crystallinity index and thermal resistance significantly increased when the alkaline treatment was conducted with 7 % NaOH solution. Higher concentrations of NaOH, such as 10, 15 and 20 %, did not considerably increase the fiber crystallinity index.