Synthesis And Characterization Of Chlorine-Free Polycyclotriphosphazene As Adhesive For Glass

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dc.contributor.authorPonnusamy, Rajeswary
dc.date.accessioned2018-09-06T03:08:55Z
dc.date.available2018-09-06T03:08:55Z
dc.date.issued2009-11
dc.description.abstractThe halogen-free phosphazene-based polymeric adhesive was synthesized via two separate steps. The first step involved the reaction of hexachlorocyclotriphosphazene with bisphenol A in the presence of dried triethylamine that afforded, after isolation and purification, a slightly yellowish solid polymer that is designated as P1 (chlorine-bound poly[2,2-di(p-hydroxophenyl)propane]cyclotriphosphazene). In the second step, P1 was reacted with ethyl 4-hydroxybenzoate to obtain a white solid polymer that is designated as P2 (chlorine-free poly[2,2-di(p-hydroxophenyl)propane]cyclotriphosphazene). Both reactions were conducted in purified 1,4-dioxane under atmosphere of dried nitrogen. P1 and P2 were characterized by means of Fourier transformed infrared (FT-IR) spectroscopy, 1H and 31P Fourier transformed Nuclear Magnetic Resonance (NMR) spectroscopy, and a hyphenated system comprising Thermo gravimetric analyzer and FT-IR spectrometer (TGA-FTIR). P2 is found to be odorless, thermally stable, non-flammable and likely to be non toxic. When melted and placed in between two pieces of glass, it formed a layer of transparent adhesive. The adhesive properties of P2 were evaluated by using a tensile machine fixed with a custom made shearing fixture to measure its shear strength. For example, usage of 0.50 g of P2 provided an excellent result of 10907.50 N of shearing force, 11.19 MPa of stress and 3.38 J of energy at maximum load to break the strong bond affected by P2 between the glass plates. To further understand the level of adhesive properties of P2, the result of 0.25 g P2 in glass plates were matched with that of 0.15 g result of super glue (ethyl cyanoacrylate) available commercially.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/6525
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectSynthesis and characterization of chlorine-free polycyclotriphosphazeneen_US
dc.subjectas adhesive for glassen_US
dc.titleSynthesis And Characterization Of Chlorine-Free Polycyclotriphosphazene As Adhesive For Glassen_US
dc.typeThesisen_US
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