Plasma Graft Polymerization of Acrylic Acid onto Dense Polystyrene Polymer by Cyclonic Plasma at Atmospheric Pressure

碩士 === 元智大學 === 化學工程與材料科學學系 === 103 === This work deals with the cyclonic atmospheric pressure plasma (CAPP) for surface modification on polystyrene (PS) surface by plasma inducing acrylic acid (AA) grafting polymerization. First, CAPP is used to activate PS and determine the activation effect w...

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Bibliographic Details
Main Authors: Yi-Jan Chang, 張奕然
Other Authors: Chun Huang
Format: Others
Language:zh-TW
Online Access:http://ndltd.ncl.edu.tw/handle/99w4q6
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Summary:碩士 === 元智大學 === 化學工程與材料科學學系 === 103 === This work deals with the cyclonic atmospheric pressure plasma (CAPP) for surface modification on polystyrene (PS) surface by plasma inducing acrylic acid (AA) grafting polymerization. First, CAPP is used to activate PS and determine the activation effect with operational conditions. Second, acrylic acid (AA) is induced grafting polymerization on PS. It is elucidated that the grafting effect on various grafting methods. The first method is that the PS was directly treated by CAPP after immersing in AAc solution. The second method is that the PS was immersed in the AAc solution with the CAPP pre-treatment. The third method is using CAPP to treat the PS immersing in the AAc solution after the CAPP pre-treatment. In addition, the optimized grafting method is found to utilize on different polymers and study the influence of different structures polymers. FTIR and XPS were used to obtain the variance of the surface functional groups and surface element contents of the CAPP treated PS. The fitting of C1s peaks can be used to derive the possible activation mechanism of atmospheric pressure plasma. The contact angle measuring test was used to detect the surface hydrophilicity. And the dispersive, polar component and surface free energy could be calculated by Owens-Wendt-Rabel-Kaelble (OWRK). AFM and SEM were employed to detect the surface morphology analysis. The grafting degree was also examined in this study. It was found that the PS surface free energy can be enhanced by CAPP. In the grafting part, the third grafting method was found to achieve the superior degree of grafting. And monomer structure of the polymer and AA monomer concentration are essential for grafting polymerization. In the different polymeric materials, the superior degree of grafting AA can be obtained on the untreated polymers which are without much oxygen containing functional groups in the side chain and there are more quantities of chemical bonds will be activated. This study represents that CAPP is a promising technique for surface grafting acrylic acid processing.