Chemical modification and specificfunctionalization of polymers : Studieson the preparation and polymer properties

• Main Authors: Kuo-Chuan Lin, 林國權
• Other Authors: Ying-Ling Liu
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/16255302113973880572

碩士 === 中原大學 === 化學工程研究所 === 95 === The aim of my study is to propose a method of modifying polymer, most polymers are inactive, and so we use modifying methods to functionlize it, in order to synthesize it with specific functional group, and to produce new living points, for it to synthesize with other monomers, and control its degree of functionalization. First, we use ozone treat method to produce Poly-vinylidene fluoride (PVDF) that that contains phenol functional group, and then we use it to react with benzoxazine, producing PVDF that contains benzoxazine functional group(we called PVDF-Bz)；then we heat up the PVDF-Bz for it to cross-linking, then to product cross-linking structured PVDF membranes. Using Instron, we can defect the difference of mechanical property before and after the cross-linking process, and detect the cross-linking density also. Although PVDF’s main chains are broken by the high energy of ozone, such that the mechanical property is not as good as the untreated PVDF. But our new modifying method has successfully produced cross-linking PVDF. In the second experiment, we use chloromethylated method to pendent (-CH2Cl) group onto PSF’s specific phenyl , and then use the terminate of chlorine to initiate the Atom Transfer Radical Polymerization (ATRP) reaction, in order to polymerize the N-Isopropyl acryl amide (NIPAAm). By utilizing the different reaction time, we control the amount of NIPAAm. PSF-g-PNIPAAm polymer made micelles will amphiphilic according to different water temperatures. We therefore produce a kind of amphiphilic polymer that is sensitive to temperature. Next, we pendent polyhedral olgomeric silsesquioxane (POSS) into PSF, producing a kind of organic-inorganic hybrid materials, TGA test shows that this process produces a SiO2 protection layer on POSS, and therefore elevate it’s thermal stability within high temperature. POSS molecules to PSF form self-assembled architecture as the mole ratio of POSS is increased, the polymer’s dielectric constants of PSF-POSS were lower due to the increased free volume and the chain interaction.