About: ATRP of POSS monomers revisited: toward high-molecular weight methacrylate

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About: ATRP of POSS monomers revisited: toward high-molecular weight methacrylate–POSS (co)polymers Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	For the first time, ATRP was successfully employed for homopolymerization of a commercial methacrylate-functionalized polyhedral oligomeric silsesquioxane (POSS) monomer, iBuPOSSMA, to high molecular weights. It was found that iBuPOSSMA has a low ceiling temperature (Tc); therefore, low temperatures and/or high initial monomer concentrations need to be used in order to avoid low degrees of polymerization that had been observed previously. The values of Tc, as well as of the polymerization enthalpy ΔHp and entropy ΔSp were determined to be 130 °C (at [M]0 = 1 M), 41 kJ mol–1, and 101 J mol–1 K–1, respectively. Under optimized conditions, poly(iBuPOSSMA) homopolymers having low dispersity and high Mn, ranging from 23 000 to 460 000, were obtained in a well-controlled ATRP process. Moreover, various block copolymers having high-Mn poly(iBuPOSSMA) blocks were prepared by copolymerization of iBuPOSSMA with methyl methacrylate and styrene. For the first time, ATRP was successfully employed for homopolymerization of a commercial methacrylate-functionalized polyhedral oligomeric silsesquioxane (POSS) monomer, iBuPOSSMA, to high molecular weights. It was found that iBuPOSSMA has a low ceiling temperature (Tc); therefore, low temperatures and/or high initial monomer concentrations need to be used in order to avoid low degrees of polymerization that had been observed previously. The values of Tc, as well as of the polymerization enthalpy ΔHp and entropy ΔSp were determined to be 130 °C (at [M]0 = 1 M), 41 kJ mol–1, and 101 J mol–1 K–1, respectively. Under optimized conditions, poly(iBuPOSSMA) homopolymers having low dispersity and high Mn, ranging from 23 000 to 460 000, were obtained in a well-controlled ATRP process. Moreover, various block copolymers having high-Mn poly(iBuPOSSMA) blocks were prepared by copolymerization of iBuPOSSMA with methyl methacrylate and styrene. (en)
Title	ATRP of POSS monomers revisited: toward high-molecular weight methacrylate–POSS (co)polymers ATRP of POSS monomers revisited: toward high-molecular weight methacrylate–POSS (co)polymers (en)
skos:prefLabel	ATRP of POSS monomers revisited: toward high-molecular weight methacrylate–POSS (co)polymers ATRP of POSS monomers revisited: toward high-molecular weight methacrylate–POSS (co)polymers (en)
skos:notation	RIV/61389013:_____/14:00434548!RIV15-GA0-61389013
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP106/12/0844)
http://linked.open...iv/cisloPeriodika	21
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Raus, Vladimír Čadová, Eva Starovoytova, Larisa Janata, Miroslav
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	4470
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/14:00434548
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	POSS; iBuPOSSMA; ATRP (en)
http://linked.open.../riv/klicoveSlovo	ATRP POSS iBuPOSSMA
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[D3135AF0479E]
http://linked.open...i/riv/nazevZdroje	Macromolecules
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Synthesis of novel types of organic-inorganic hybrid copolymers (nanocomposites) and study of their properties
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	47
http://linked.open...iv/tvurceVysledku	Janata, Miroslav Raus, Vladimír Starovoytova, Larisa Čadová, Eva
http://linked.open...ain/vavai/riv/wos	000344905800006
issn	0024-9297
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1021/ma501541g

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