ATRP of POSS monomers revisited: toward high-molecular weight methacrylate?POSS (co)polymers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F14%3A00434548" target="_blank" >RIV/61389013:_____/14:00434548 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/ma501541g" target="_blank" >http://dx.doi.org/10.1021/ma501541g</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/ma501541g" target="_blank" >10.1021/ma501541g</a>

Jazyk výsledku

angličtina

Název v původním jazyce

ATRP of POSS monomers revisited: toward high-molecular weight methacrylate?POSS (co)polymers

Popis výsledku v původním jazyce

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 ceilingtemperature (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 ?Hp and entropy ?Sp 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.

Název v anglickém jazyce

ATRP of POSS monomers revisited: toward high-molecular weight methacrylate?POSS (co)polymers

Popis výsledku anglicky

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 ceilingtemperature (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 ?Hp and entropy ?Sp 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GAP106%2F12%2F0844" target="_blank" >GAP106/12/0844: Syntéza nových typů organicko-anorganických hybridních kopolymerů (nanokompozitů) a studium jejich vlastností</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Macromolecules

ISSN

0024-9297

e-ISSN

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Svazek periodika

47

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

7311-7320

Kód UT WoS článku

000344905800006

EID výsledku v databázi Scopus

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