Molecular weight and configurational stability of poly(phenylacetylene) prepared with Rh catalyst

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F11%3A10098757" target="_blank" >RIV/00216208:11310/11:10098757 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2011.04.003" target="_blank" >http://dx.doi.org/10.1016/j.polymdegradstab.2011.04.003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.polymdegradstab.2011.04.003" target="_blank" >10.1016/j.polymdegradstab.2011.04.003</a>

Result language
angličtina
Original language name
Molecular weight and configurational stability of poly(phenylacetylene) prepared with Rh catalyst
Original language description
High-cis poly(phenylacetylene) (PPhA) has been prepared by polymerization of phenylacetylene with [Rh(COD)acac] catalyst and its molecular weight (MW) and configurational stability studied by SEC, (1)H NMR, UV/vis and IR techniques. PPhA dissolved in THFand THF-d(8) and exposed to the atmosphere and daylight at room temperature was found to undergo simultaneous cis-trans isomerisation and oxidative degradation accompanied by formation of a small amount (similar to 2 wt. %) of 1,3,5-triphenylbenzene. The extent of 1,3,5-triphenylbenzene formation was at least one order of magnitude lower than the extent of formation of new (shorter) PPhA macromolecules via their scission from the longer ones. Preparative MW-based fractionation revealed that a partly aged PPhA contains both (i) deeply isomerised macromolecules (forming the lower-MW fraction) and (ii) microstructurally unperturbed high-cis macromolecules (forming the higher-MW fraction).
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CD - Macromolecular chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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