title: Synthesis and drug release behavior of poly (trimethylene carbonate)-poly (ethylene glycol)-poly (trimethylene carbonate) nanoparticles.
abstract: ABA-type triblock copolymers poly (trimethylene carbonate)-poly (ethylene glycol)-poly (trimethylene carbonate) were synthesized by ring-opening polymerization of trimethylene carbonate initiated by dihydroxyl poly (ethylene glycol). The critical micelle concentration of amphiphilic triblock copolymers in aqueous solution was determined by fluorescence spectroscopy using 9-chloromethyl anthracene as fluorescence probe. Core-shell-type nanoparticles were prepared by the dialysis technique. Transmission electron microscopy images showed that these nanoparticles were regularly spherical in shape. Micelle size determined by dynamic light scattering is 50-160 nm. Anticancer drug methotrexate (MTX) as model drug was loaded in the polymeric nanoparticles. X-ray powder diffraction spectra showed that model drugs were molecularly dispersed in the core. In vitro release behavior of MTX was investigated.
authors.affiliation: Department of Chemistry, Key Laboratory of Biomedical Polymers of the Ministry of Education, Wuhan University, Wuhan 430072, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ren-Xi
authors.initials: RX
authors.lastname: Zhuo
mesh_terms: D000970:Antineoplastic Agents / Q000008:administration & dosage / Q000737:chemistry; D001672:Biocompatible Materials / Q000737:chemistry; D001826:Body Fluids / Q000737:chemistry; D004058:Diffusion; D004337:Drug Carriers / Q000737:chemistry*; D004343:Drug Implants / Q000737:chemistry*; D008422:Materials Testing; D008727:Methotrexate / Q000008:administration & dosage* / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D011091:Polyesters; D011092:Polyethylene Glycols
chemical_list: D000970:Antineoplastic Agents; D001672:Biocompatible Materials; D004337:Drug Carriers; D004343:Drug Implants; C500692:PTMC-PEG-PTMC; D011091:Polyesters; D011092:Polyethylene Glycols; D008727:Methotrexate