<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> / Thesis / Master of Science (MSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19282 |
| Date | 05 1900 |
| Creators | Valentini, David A. |
| Contributors | Brook, M. A., Chemistry |
| Source Sets | McMaster University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis |
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