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This paper presented a new approach for preparing a new type of slow-release membrane-encapsulated urea fertilizer with starch-g-PLLA as biodegradable carrier materials. By solution-casting and washing rapidly with water the urea was individually encapsulated within the starch matrix modified by l-lactide through in situ graft-copolymerization. The release behavior of urea encapsulated in the films...
A novel biodegradable triblock copolymer poly(ethylene glycol)-b-poly(l-lactide)-b-poly(l-lysine) (PEG–PLA–PLL) was synthesized by acidolysis of poly(ethylene glycol)-b-poly(l-lactide)-b-poly(ɛ-benzyloxycarbonyl-l-lysine) (PEG–PLA–PZLL) obtained by the ring-opening polymerization (ROP) of ɛ-benzyloxycarbonyl-l-lysine N-carboxyanhydride (ZLys NCA) with amino-terminated PEG–PLA–NH 2 as a macroinitiator,...
Crystallization behavior, structural development and morphology evolution in a series of diblock copolymers of poly(l-lactide)-block-poly(ethylene glycol) (PLLA-b-PEG) were investigated via differential scanning calorimetry, wide-angle X-ray diffraction, polarized optical microscopy and atomic force microscopy. In these copolymers, both blocks are crystallizable and biocompatible. It was interesting...
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