Polylactic acid (PLA) medicinal polymer with hexagonal columnar porous structure
A technology of polylactic acid and polymer materials, which is applied in the preparation of block polymer materials and the preparation of star-shaped block copolymer porous drug carriers, to achieve reduced toxic and side effects, high drug load, and good biocompatibility Effect
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[0023] ①Preparation of star block copolymer
[0024] Using L-lactide as raw material, a three-armed or multi-armed star-shaped polylactic acid was synthesized by the classic stannous octoate-catalyzed ring-opening method. The star-shaped macromolecular initiator SPLA-Br with bromine terminal functional groups was obtained. The macroinitiator and NIPAM are carried out ATRP polymerization in a certain ratio to obtain the star-shaped block polymer of PNIPAM with PLA as the core.
[0025] ②Characterization of the self-assembled structure and properties of star-shaped block copolymer materials
[0026] The chemical structure and morphology of polymers are the basis for studying the properties of polymers. This topic intends to use gel permeation chromatography (GPC), Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance (NMR) methods to detect the chemical structure and degree of polymerization of polymers, and use thermogravimetric analysis (TGA) to analy...
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