Skip navigation
  • Home
  • Browse
    • Communities
      & Collections
    • Browse Items by:
    • Publication Date
    • Author
    • Title
    • Subject
    • Department
  • Sign on to:
    • My MacSphere
    • Receive email
      updates
    • Edit Profile


McMaster University Home Page
  1. MacSphere
  2. Open Access Dissertations and Theses Community
  3. Open Access Dissertations and Theses
Please use this identifier to cite or link to this item: http://hdl.handle.net/11375/19282
Title: The Coupling of Synthetic and Biological Polymers: Silicone - Starch Composites
Authors: Valentini, David A.
Advisor: Brook, M. A.
Department: Chemistry
Keywords: coupling, synthetic, biological, polymers, silicone, composites
Publication Date: May-1996
Abstract: <p> This thesis presents a study of the compatiblization of a hydrophobic, synthetic polymer, polydimethylsiloxane (PDMS) and a hydrophilic biopolymer, starch. The Diels- Alder adduct of cyclopentadiene and maleic anhydride, bicyclo[2.2.1]hept-5-ene-2,3- dicarboxylic-anhydride, (1), was hydrosilylated with hydride- terminated PDMS to yield α,ω-bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic-anhydride-polydimethylsiloxane, (4) having an average molecular weight of 750 g mol^-1. This was then reacted with starch using dimethylaminopyridine as a catalyst in a dimethylsulfoxide medium at 80°C to yield a silicone-starch graft copolymer having a γ-carboxylic-ester linkage.</p> <p> In order to study the influences of the quantity of hydrophobic and hydrophilic components, a series of composites were synthesized varying the starch and silicone stoichiometry (series-1).</p> <p> In order to study the influence of the molecular weight of the silicone, 4 was redistributed with octamethylcyclotetrasiloxane (D4) via cationic polymerization to yield higher molecular weight derivatives. The products were 7 (1500 g mol^-1) and 8 (9000 g mol^-1). These were reacted with starch to give a series of composites for each molecular weight of the functionalized silicone.</p> <p> Spectroscopic and physical properties were analyzed for developing trends.</p>
URI: http://hdl.handle.net/11375/19282
Appears in Collections:Open Access Dissertations and Theses

Files in This Item:
File Description SizeFormat 
Valentini_David_A._1996May_Masters..pdf
Open Access
1.87 MBAdobe PDFView/Open
Show full item record Statistics


Items in MacSphere are protected by copyright, with all rights reserved, unless otherwise indicated.

Sherman Centre for Digital Scholarship     McMaster University Libraries
©2022 McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L8 | 905-525-9140 | Contact Us | Terms of Use & Privacy Policy | Feedback

Report Accessibility Issue