Research of the LCST of Poly-(N-isopropylacrylamide) Related Thermoresponsive Copolymer Microgels:

• Main Authors: En-Kang Yang, 楊恩伉
• Other Authors: 邱文英
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/32365679794917807564

碩士 === 國立臺灣大學 === 材料科學與工程學研究所 === 94 === The goal of the research is the preparation of poly-N-isopropylacrylamide (p-NIPAAm) related thermoresponsive copolymer microgels and discussions of their properties and application. The thermoresponsive copolymer latex particles with the average diameter of about 200~500nm were prepared via surfactant–free emulsion polymerization. The effects of co-monomers and composition on the synthesis, kinetics, particle size, morphology, and thermoresponsive properties of the copolymer latex were studied to realize the relationship between the synthesis condition, the particle morphology and thermoresponsive properties successfully. Now we find that if we add a small amount of hydrophobic monomer, BMA, into NIPAAm monomer to copolymerize, the resulting polymer will have a decreased LCST. If we add a small amount of BA, into NIPAAm monomer to copolymerize, the resulting polymer will have a more decreased LCST. In addition, the thermodynamic model can be used to describe the thermoresponsive behavior of the polymer solution.