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Determination of Residual Solvents in Biodegradable Poly(Lactide-Co-glycolide) (PLGA)
A headspace gas chromatography method was established for the determination of residual solvents in poly( lactide - co-glycolide) . The method was programmed with DB - 624 capillary column (30m x530μm x3.0μm) and fame ionization detector (FlD).
2025-01-04
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In vitro hydrolytic degradation of poly(para-dioxanone) with different mediums
The in vitro degradation of Poly(para-dioxanone)with different mediums was studied by the changes of weight retention, water absorption,viscosity,pH value and mechanicalproperties of PPDO samples were examined in distilled water ( H2O) ( pH 60.50)、normal saline(NS (pH 4.50)and phosphate buffered saline(PBS) ( pH 7.44) at 37℃ for 4 weeks. The results suggested that the PPDO samples in H2O and NS exhibited faster degradation rate in vitro degradation.
2025-01-04
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Synthesis and Degradation Performance of PoIy(glycolic acid-co-caprolactone)
Synthesis and Degradation Performance of PoIy(glycolic acid-co-caprolactone)Poly( glycolic acid-co-caprolactone) (Px)were synthesized by polymerization of glyeolicacid with caprolactone using stannous octoate as the catalyst. In vitro accelerated degradation of Px were investigated.
2025-01-04
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Quantitative Detection Method for Residual Monomer in Polylactic Acid
Polylactic acid has good biocompatibility and degradability, good thermoplasticity and high strength. It can be processed into various medical products. It has been widely used in medical device products such as fracture internal fixation and bone repair, degradable stents, absorbable sutures, tissue engineering stents, 3D printing implants, etc.
2025-01-04
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Application of biodegradable polymer materials in medical devices
The performance and degradation characteristics of several commonly used biodegradable polymer materials are reviewed, including polyglycolide,polylacticacid,(glycolide-lactide) copolymer,polycaprolactone,polydioxanone,polyhydroxyalkanoate, polytrimethylene carbonate, polyurethane and polyether urethane, etc., and their applications in medical devices, including implants, tissue engineering scaffolds, drug controlled release carriers, etc. are reviewed.
2025-01-04
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Method for determination of monomer residues in biodegradable polydioxanone materials
Establish a gas chromatography method for testing the residual monomer dioxanone in polydioxanone raw materials. A DB-624 capillary column (30.0 m ×535 μm ×3.00 μm) was used, and the temperature was programmed (146 ℃ for 5 min, 30 ℃/min to 200 ℃, and maintained for 2 min).
2025-01-04
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Polydioxanone (PDO) Degradation
Like most polyester-based polymers used in manufacturing bioresorbable medical devices, PDO-based materials degrade via bulk erosion where water diffuses within the polydioxanone material and slowly hydrolyzes the polymer chains. Generally, the PDO polymer will first exhibit a decrease in average molecular weight, followed by a decrease in strength, and lastly a decrease in overall mass.......
2025-01-04