“Poly(hydridocarbyne)”的意思、由来-开放百科全书

词条

Poly(hydridocarbyne)

释义

References
Notes
External links

{{Chembox
| Name = Poly(hydridocarbyne)
| ImageFile = phc.png
| ImageSize = frameless
| Section1 = {{Chembox Identifiers
| CASNo =
| PubChem =
| SMILES =
| ChemSpiderID = none
}}
| Section2 = {{Chembox Properties
| Formula = [HC]n
| MolarMass = 200,000 to 100 million Daltons
| Appearance =
| Density =
| MeltingPt = decomposes @ 100 °C
| BoilingPt = N/A
| Solubility =
}}
}}

Poly(hydridocarbyne) (PHC) is one of a class of carbon-based random network polymers primarily composed of tetrahedrally hybridized carbon atoms, each having one hydride substituent, exhibiting the generic formula [HC]n. PHC is made from bromoform, a liquid halocarbon that is commercially manufactured from methane. At room temperature, poly(hydridocarbyne) is a dark brown powder. It can be easily dissolved in a number of solvents (tetrahydrofuran, ether, toluene etc.), forming a colloidal suspension that is clear and non-viscous, which may then be deposited as a film or coating on various substrates. Upon thermolysis in argon at atmospheric pressure and temperatures of 110 °C to 1000 °C, decomposition of poly(hydridocarbyne) results in hexagonal diamond (Lonsdaleite).

More recently poly(hydridocarbyne) has been synthesized by a much simpler method using electrolysis of chloroform (May 2008)^[1] and hexachloroethane (June 2009).^[2]

The novelty of PHC (and its related polymer poly(methylsilyne)) is that the polymer may be readily fabricated into various forms (e.g. films, fibers, plates) and then thermolized into a final hexagonal diamond ceramic.

References

{{cite journal |vauthors=Bianconi P, etal |year=2004 |title=Diamond and Diamond-like Carbon from a Preceramic Polymer |journal=Journal of the American Chemical Society |volume=126 |issue=10 |pages=3191–3202 |pmid=15012149 |doi=10.1021/ja039254l}}
{{cite web |vauthors=Bianconi P, etal |year=2004 |title=High molecular weight polymers |url=http://www.patentdebate.com/PATAPP/20040010108}} (US patent application)
{{cite journal |vauthors=Toppare L, etal | date=May 2008| title=Facile Synthesis of Poly(hydridocarbyne): A Precursor to Diamond and Diamond-like Ceramics |journal=Journal of Macromolecular Science, Part A |volume = 45 |issue = 5|pages=358–363 |doi=10.1080/10601320801946108}}
{{cite journal |vauthors=Toppare L, etal | date=June 2009| title=Electrochemical polymerizatıon of hexachloroethane to form poly(hydridocarbyne): a pre-ceramic polymer for diamond production|journal=Journal of Materials Science|volume=44|issue=11|pages=2774–2779|doi=10.1007/s10853-009-3364-4}}

Notes

1. ^Toppare L et al. (2008) Facile Synthesis of Poly(hydridocarbyne): A Precursor to Diamond and Diamond-like Ceramics, Journal of Macromolecular Science, Part A 45 (5), May, 358–363, doi=10.1080/10601320801946108.
2. ^Toppare L et al. (2009) Electrochemical polymerizatıon of hexachloroethane to form poly(hydridocarbyne): a pre-ceramic polymer for diamond production, Journal of Materials Science 44 2774–2779, doi=10.1007/s10853-009-3364-4.

External links

Facile Synthesis of Poly(hydridocarbyne): A Precursor to Diamond and Diamond-like Ceramics
[https://web.archive.org/web/20070416032431/http://www.liftport.com/progress/wp/?p=839 Liftport Staff Blog discussion]

2 : Polymers|Organic polymers

随便看

开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。