Fiber-polymer matrix interfaces are critical components of high performance composite materials. In this thesis we utilized microwave plasma surface reactions in the presence of maleic anhydride to functionalize carbon fiber surfaces. As a result, carboxylic acid and hydroxyl groups were generated, which facilitated covalent bonding to epoxy-based polymer matrices. Raman and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectroscopy were utilized to characterize the fiber surfaces, whereas mechanical properties of newly formed interfaces were assessed using shear stress analysis. These studies show that using solventless microwave plasma surface modifications, interfacial mechanical properties of carbon fiber-epoxy matrix can be enhanced by ∼ 6%. The broader impact of these studies is that microwave plasma fiber surface modifications can be utilized to functionalize other polymeric and inorganic fibers, with an ultimate goal of enhancing composite interfacial and overall properties.
|Commitee:||Brown, Philip, Luzinov, Igor|
|Department:||Materials Science and Engineering|
|School Location:||United States -- South Carolina|
|Source:||MAI 55/06M(E), Masters Abstracts International|
|Subjects:||Polymer chemistry, Materials science, Plastics|
|Keywords:||Carbon fibers, Engineering, Microwave plasma, Polymers, Research, Surface modifications|
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