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Synthesis of silsesquioxane nanocomposites
Smrtka, Ondřej and Jančář, Josef Synthesis of silsesquioxane nanocomposites Chemical Papers, Vol.62, No. 5, 2008, 504-508
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Smrtka, Ondřej
Jančář, Josef
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| Title |
Synthesis of silsesquioxane nanocomposites
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| Journal name |
Chemical Papers
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| Publication date |
2008
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| Year available |
2008
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| Volume number |
62
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| Issue number |
5
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| ISSN |
0366-6352
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| Start page |
504
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| End page |
508
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2008
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| Language |
english
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| Subject |
250000 Chemical Sciences
250500 Macromolecular Chemistry
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| Abstract/Summary |
In order to investigate the effect of presence of well defined nano-sized inorganic particles on the molecular mobility a conformation statistics of polymer chains, well defined polystyrene (PS) and poly(methyl methacrylate) (PMMA) macromolecules containing polyhedral oligomeric silsesquioxanes nanoparticles (POSS) were synthesized by copper-mediated atom transfer radical polymerization (ATRP). Two approaches were used for the synthesis — the first involves POSS as the initiator of ATRP; the second way considers an addition of POSS to the polymer (prepared by ATRP) with an appropriate functional group. Kinetics of polymerization was determined using common analytical methods and it was compared to the polymerizations initiated by low-molecular weight initiators, regarding the polymerization rate, initiation efficiency and polydispersity of the polymer. Efficiency of the initiation with POSS-containing initiators was low, causing remnants of inseparable free POSS in polymer. The second approach bypassed these disadvantages —POSS is connected to the polymer through a pending allyl group using the very efficient hydrosilylation reaction.
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