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VOJTOVÁ, L. TURRO, N. KOBERSTEIN, J.
Originální název
ATRP Synthesis and Characterization of alpha,omega-allyl-terminated Macromonomers as Precursors for End-linked Gels and Hydrogels
Typ
článek v časopise - ostatní, Jost
Jazyk
angličtina
Originální abstrakt
Synthesis of alpha,omega-allyl-terminated telechelic macromonomers based on poly(tert-butyl methacrylate) (poly(t-BMA)) and poly(methacrylic acid) (poly(MAA)) was studied with the aim of preparing end-linked gels and hydrogels. Low molecular weight alpha-allyl-terminated poly(t-BMA) macromonomers with narrow polydispersities (Mw/Mn = 1.16) were synthesized via controlled atom transfer radical polymerization (ATRP) using a Cu(I)Br/hexamethyltriethylenetetraamine catalyst system in conjunction with an allyl-2-bromoisobutyrate as the functional initiator. The polymerizations exhibited a linear increase of molecular weight in direct proportion to the monomer conversion and first-order kinetics with respect to monomer concentration. No significant difference was found between using polar or non-polar solvents (tetrahydrofuran or benzene, respectively). Optimization of reaction conditions to obtain the highest degree of active terminal bromine is discussed. Quenching the ATRP reaction with allyltributyltin yielded alpha,omega-allyl-terminated poly(t-BMA) macromonomers by replacing the terminal bromine with omega-allyl functional group. Poly(MAA) macromonomers were prepared by deprotection of the tert-butyl group from alpha,omega-allyl-terminated poly(t-BMA) macromonomers using concentrated trifluoroacetic acid at room temperature. Successful synthetic steps were confirmed by 1H NMR, FT-IR and MALDI-TOF MS analyses.
Klíčová slova
macromonomers, hydrogels, characterization
Autoři
VOJTOVÁ, L.; TURRO, N.; KOBERSTEIN, J.
Vydáno
21. 4. 2003
Nakladatel
Materials Research Society
Místo
USA
ISSN
0272-9172
Periodikum
Materials Research Society symposia proceedings
Ročník
774
Číslo
O
Stát
Spojené státy americké
Strany od
59
Strany do
73
Strany počet
15
BibTex
@article{BUT50188, author="Lucy {Vojtová} and Nicholas {Turro} and Jeffrey T. {Koberstein}", title="ATRP Synthesis and Characterization of alpha,omega-allyl-terminated Macromonomers as Precursors for End-linked Gels and Hydrogels", journal="Materials Research Society symposia proceedings", year="2003", volume="774", number="O", pages="59--73", issn="0272-9172" }