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Development of Photoresponsive Polymers and Polymer/Inorganic Composite Materials Based on the Coumarin Chromophore

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2013, Master of Science, University of Akron, Polymer Science.
Stimuli responsive polymers show noticeable changes in their properties in response to environmental stimuli and are used in many applications. Various stimuli such as pH, temperature, and in our case, light have been used to bring about the desired effect. Due to their tunable photoresponsive properties, coumarin and its derivatives have been widely used in many functional polymeric materials. Our group has developed a new class of photoresponsive coumarin polyesters that exhibit crosslinking at 350nm and chain scission properties at 254nm. The first part of the thesis was focused on the development of visible light responsive coumarin chromophores. By substituting bromines on the coumarins, the wavelength at the absorption maximum was redshifted. These new coumarin derivatives have the maximum UV absorption between 390-420nm, which could enable their utility in biomedical chemistry in future. The second part of this thesis was focused on the development of a class of low moduli photoresponsive polymers, based on the coumarin photoactive unit. These new photoresponsive materials can crosslink under 350nm irradiation. The new polymers have low moduli and show viscous properties before irradiation. Upon crosslinking they display a significant change in physical and mechanical properties. In order to extend the applications of these materials, we prepared a series of photoresponsive polymer/inorganic composite materials with silica. We believe, these polymers have the potential for various biomedical applications such as in filling voids in dental and osteological applications.
Abraham Joy, Dr. (Advisor)
Toshikazu Miyoshi, Dr. (Committee Member)
100 p.

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Citations

  • Fan, W. (2013). Development of Photoresponsive Polymers and Polymer/Inorganic Composite Materials Based on the Coumarin Chromophore [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366903513

    APA Style (7th edition)

  • Fan, Weizheng. Development of Photoresponsive Polymers and Polymer/Inorganic Composite Materials Based on the Coumarin Chromophore . 2013. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1366903513.

    MLA Style (8th edition)

  • Fan, Weizheng. "Development of Photoresponsive Polymers and Polymer/Inorganic Composite Materials Based on the Coumarin Chromophore ." Master's thesis, University of Akron, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1366903513

    Chicago Manual of Style (17th edition)