The study on the synthesis and properties of polyurethanes containing silver metal

• Main Authors: Jun-Sen Wang, 王駿森
• Other Authors: Yueh-Hua Wang
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/87020351412592986981

碩士 === 南亞技術學院 === 材料應用科技研究所 === 99 === In this study, the hard segment mainly uses the polyurethane pre-polymer synthesized from aromatic 4,4-Methlene-bis- (Phenylisocyanat) (MDI) and the Polyether glycol (PTMG), and then undergo polymerization reaction with the 4-AgPyNH2 chain extender produced from the synthesis of 4-Aminopyridine and Silver Nitrate, this reaction will produce 4-AgPyNH2/polyurethane material. We study the relationship of 4-AgPyNH2 chain extender changes to the ratio of polymer, and to understand the material properties by the thermal properties, mechanical properties, and antibacterial test and so on. It can be proved by FTIR and NMR there were successfully synthesis of 4-AgPyNH2 chain extender and successfully polymerization of 4-AgPyNH2/polyurethane materials. Analysis of the thermal pyrolysis temperature of TGA test shows that primary pyrolysis temperature presents rising tendency, and the secondary pyrolysis presents decline tendency due to low heat resistance property of 4-AgPyNH2 chain extender. In the analysis graphs of DMA and DSC test, we found the storage modulus, Tg and Tm will increase along with the 4-AgPyNH2 chain extender increased. We use spectrophotometer to find that Polyurethane/4-AgPyNH2 composite material has ultraviolet shielding effect. In the analysis graph of XRD test, it shows that around 21° and 24° of 2θ angle appear the peak of polyurethane crystal and the 32° of 2θ angle shows the peak of silver ion crystal. In the analysis graph of EDS test, we know that silver ion content appear increasing along with 4-AgPyNH2 chain extender increased. The mechanical strength and elongation in MTS test will decrease along with 4-AgPyNH2 chain extender increased, and the Young’s modulus coefficient has increased significantly. In swelling experiment, it shows the degree of swelling decrease along with 4-AgPyNH2 chain extender increased. And we use Staphylococcus aureus and Klebsiella pneumoniae for antibacterial test can know that the anti-bacterial properties of Polyurethane/4-AgPyNH2 materials will increase along with the 4-AgPyNH2 chain extender increased.