Publication:
Highly branched poly(arylene ether)s via oligomeric A(2)+B-3 strategies

dc.contributor.coauthorLin, Q
dc.contributor.coauthorUnal, S
dc.contributor.coauthorFornof, AR
dc.contributor.coauthorLong, TE
dc.contributor.departmentDepartment of Chemistry
dc.contributor.kuauthorYılgör, İskender
dc.contributor.schoolcollegeinstituteCollege of Sciences
dc.date.accessioned2024-11-09T23:34:17Z
dc.date.issued2006
dc.description.abstractBranched poly(arylene ether)s were prepared in an oligomeric A(2) + B-3 polymerization of phenol endcapped telechelic poly(arylene ether sulfone) oligomers as A(2) and TFPPO as trifunctional monomer B-3. The molar mass of the A(2) oligomer significantly influenced the onset of gelation and the DB. A high level of cyclization during polymerization of low molar mass A oligomers (U-3 = 660 and U-6 = 1200 g h conversion of functional groups in the mol(-1)) led to a high absence of gelation, and the level of cyclization reactions in the polymerization decreased as the molar mass of the A, oligomer was increased. The pronounced steric effect in the polymerization of higher molar mass A(2) oligomers (U-8 = 1800 and U-16 = 3400 g (.) mol(-1)) resulted in low reactivity of the third aryl fluoride in the B3 monomer. As a result, only slightly branched (U-8 = 1800 g (.) mol(-1)) or nearly linear (U-16 = 3400 g (.) mol(-1)) high molar mass products were obtained with higher molar mass A(2) oligomers. The branched polymers exhibited lower Mark-Houwink exponents and [eta] relative to linear analogs, and differences between the branched polymers and linear analogs were less significant as the molar mass of the A oligomers was increased due to a decrease in the overall DB.
dc.description.indexedbyWOS
dc.description.indexedbyScopus
dc.description.issue6
dc.description.openaccessNO
dc.description.sponsoredbyTubitakEuN/A
dc.description.volume207
dc.identifier.doi10.1002/macp.200500503
dc.identifier.eissn1521-3935
dc.identifier.issn1022-1352
dc.identifier.scopus2-s2.0-33645673447
dc.identifier.urihttps://doi.org/10.1002/macp.200500503
dc.identifier.urihttps://hdl.handle.net/20.500.14288/12325
dc.identifier.wos236600200002
dc.keywordsA(2) + B-3 polymerization
dc.keywordsBranched
dc.keywordsHyperbranched
dc.keywordsPoly(arylene ether)
dc.keywordsPolysulfone
dc.language.isoeng
dc.publisherWiley-V C H Verlag Gmbh
dc.relation.ispartofMacromolecular Chemistry And Physics
dc.subjectPolymers
dc.subjectPolymerization
dc.titleHighly branched poly(arylene ether)s via oligomeric A(2)+B-3 strategies
dc.typeJournal Article
dspace.entity.typePublication
local.contributor.kuauthorYılgör, İskender
local.publication.orgunit1College of Sciences
local.publication.orgunit2Department of Chemistry
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