Title page for etd-0727110-103452


[Back to Results | New Search]

URN etd-0727110-103452
Author Hsin-Tung Tsai
Author's Email Address No Public.
Statistics This thesis had been viewed 5560 times. Download 2863 times.
Department Materials and Optoelectronic Science
Year 2009
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title Application of polymer material by mimicking nature hydrogen bonding
Date of Defense 2010-07-14
Page Count 101
Keyword
  • PBLG
  • PMMA
  • Polymer blend
  • Abstract This research includes two topics. The first topic is prepared a series of poly(methyl methacrylate) (PMMA)-based copolymers through free radical copolymerizations of methyl methacrylate in the presence of the either 2 - vinyl - 4,6 -diamino - 1, 3, 5triazine(VDAT) or vinylbenzyl -thymine (VBT). Using 1H nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry (DSC), we investigated the thermal properties and hydrogen-bonding interactions within blends of the two copolymers poly(2-vinyl-4,6-diamino-1,3,5-triazine-co-methyl methacrylate) (PVD AT-co-PMMA) and poly(vinylbenzylthymine-co-methyl methacrylate) (PVBT-co-PMMA). A large positive deviation in the behavior of the glass transition temperature determined by using the Kwei equation and DSC analyses indicated that strong multiple hydrogen-bonding interactions existed between the two copolymers. The FTIR and solid-state NMR spectroscopic analyses provided positive evidence for the presence of three hydrogen bonds between the diamino-1,3,5-triazine groups of PVDAT and thymine groups of PVBT.
    The second topic is synthesized a series of alkyne end-terminated poly(γ-Benzyl L-glutamate) (alkyne-PBLG), which was prepared by the ring-opening polymerization of the N-carboxyanhydride monomer of γ-Benzyl L-glutamate-carboxyanhydride. Then combination of the alkyne-PBLG with polyhedral oligomeric silsesquioxanes (POSS) with eight function groups are prepared through the click reation and formed a peptide-based block polymer with α-helice and β-sheet conformations. The thermal properties and structure of these polypeptides were characterized by using 1H NMR and FTIR. The FTIR, solid-state NMR and WXRD spectroscopic analyses provided evidence for the change of secondary structure between POSS and terminated peptide group, so that the conformation of β-sheets and α-helices would be influenced by the incorporation of POSS nanoparticle.
    Advisory Committee
  • Ming Chen - chair
  • Jin-Long Hong - co-chair
  • Y.W. Chiang - co-chair
  • Shiao-Wei Kuo - advisor
  • Files
  • etd-0727110-103452.pdf
  • indicate in-campus access immediately and off_campus access in a year
    Date of Submission 2010-07-27

    [Back to Results | New Search]


    Browse | Search All Available ETDs

    If you have more questions or technical problems, please contact eThesys