Polycarbynes ( poly(hydridocarbyne), poly(methylcarbyne) and poly(phenylcarbyne) ) are a
class of network polymers which are primarily composed of tetrahedrally hybridizated carbon
atoms which have hydrogen, methyl or phenyl pendant group linked via three carbon-carbon
single bonds to form a three dimensional network of fixed rings. This backbone oers unusual
properties on the polymer including thermal decomposition to form diamond and diamondlike
carbon.
In this thesis, polycarbynes were synthesized by electrolytical reduction of trihaloorganocompounds,
namely chloroform, hexachloroethane, 1,1,1-trichloroethane and
1,1,1-trichlorotoluene. Poly(hydridocarbyne) was synthesized using chloroform and
hexachloroethane. Poly(methylcarbyne) was synthesized from 1,1,1-trichloroethane.
Poly(phenylcarbyne) was synthesized from 1,1,1-trichlorotoluene. Polycarbynes were characterized
by UV/Vis spectroscopy, 1H and 13C NMR spectroscopy, FTIR and GPC. All results
are found to be consistent with literature / and thus a single step cheap, safe and easy method
was introduced to scientists and manufacturers in diamond science. The resulting polymers
were heated upon 1000oC under nitrogen atmosphere for 24 hours yielding in the formation
of diamond and diamond-like carbon. Results indicated that both diamond films and powders
were successfully produced from polycarbynes. Diamonds formed from the polymers
were characterized via optical microscope, SEM, X-ray and Raman spectroscopy. All results
shown in thesis are completely consistent with studies previously done for polycarbynes and
diamond.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613168/index.pdf |
| Date | 01 April 2011 |
| Creators | Nur, Yusuf |
| Contributors | Toppare, Levent |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | Ph.D. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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