Hidrojen transfer polimerizasyonu (HTP) ile uç grubu olefinik olan
oligomerlerin elde edildiği ortaya konulmuştur. Bu oligomerik yapıların kimyasal
modifikasyonu ile fonksiyonlandırılması (aktifleştirilmesi), bu yapının
makromonomer olarak kullanımı ve yeni blok kopolimerlerin elde edildiği de
bilinmektedir. Tez çalışmasında, akrilamit, metakrilamit ve krotonamitten HTP ile
elde edilen oligomerik yapılar makromonomer olarak kullanılmıştır. Bu oligomerik
yapılar ile tek tek akrilik asit, metakrilik asit ve krotonik asit gibi hidrofilik vinil
monomerlerinin serbest radikal polimerizasyonu çözelti ortamında çalışılmıştır. Yani,
olefin uçlu makromonomerlerin ve vinil monomerlerinin serbest radikal
polimerizasyonunda aynı zincirde bulunacakları öngörülerek vinil monomerinin
homopolimerine makromonomerlerin aşılanması hedeflenmiştir. Böylece, karbon
iskeletine sahip bir vinil polimerine amit iskeleti olan dalların eklenmesi başarılmıştır.
Krotonik asit ve her üç makromonomerin kullanıldığı sentez çalışmalarında
polimer sentezi sağlanamamıştır. Ayrıca, poli(β-metil β-alanine) makromonomeri
kullanılan sentez denemelerinde de homopolimer (PAA ve PMA) elde edilebilmiştir.
Sentezlenmesi planlanan aşı kopolimerlerin bir kısmı başarıyla sentezlenmiştir.
Bunlar; poli(akrilik asit-aşı-β-alanin), poli(akrilik asit-aşı-α-metilβ-alanin),
poli(metakrilik asit-aşı-β-alanin) ve poli(metakrilik asit-aşı-α-metilβ-alanin) aşı
kopolimerleridir. İzolasyonu sağlanan bu kopolimerlerin FT-IR, 1H-NMR, elementel
analiz, DSC ve TGA teknikleri ile karakterizasyon sağlanmıştır. Formik asit veya
formik asit/metanol çözücüleri kullanılarak %10 (w/v)’luk çözeltileri hazırlanan bu
kopolimerlerin elektroeğirme yöntemi ile lifler hazırlanmıştır. Elektroeğirme
parametreleri (voltaj, iğne-hedef mesafesi, iğne çapı gibi) değiştirilerek hazırlanan
hem nano hem de mikro çaplı fiberler SEM analizleri ile ortaya konmuştur. Ayrıca,
Enerji Dağılımlı X-ışını Spektroskopisi (EDX) analizi ile fiberlerde azot atomlarının
varlığı ve dağılımının homojenitesi ortaya konmuştur.,It has been demonstrated that oligomers with olefinic end groups are obtained
by hydrogen transfer polymerization (HTP). It is also known that these oligomeric
structures are functionalized (activated) by chemical modification, the use of this
structure as macromonomer and new block copolymers are obtained. In the thesis
study, oligomeric structures obtained from acrylamide, methacrylamide and
crotonamide by HTP were used as macromonomers. These oligomeric structures and
free radical polymerization of hydrophilic vinyl monomers such as acrylic acid,
methacrylic acid and crotonic acid one by one were studied in solution environment.
In other words, it is aimed to graft macromonomers to homopolymer of vinyl monomer
by predicting that olefin-terminated macromonomers and vinyl monomers will be in
the same chain in free radical polymerization. Thus, the addition of branches with an
amide skeleton to a vinyl polymer ith a carbon skeleton has been achieved.
Synthesis of crotonic acid could not be performed in the synthesis of its three
macromonomers. In addition, homopolymer (PAA and PMA) could be obtained in the
synthesis of poly(β-methyl β-alanine) macromonomer. The synthesis of some of the
graft copolymers has been completed. These; poly(acrylic acid-graft-β-alanine),
poly(acrylic acid-graft-α-methyl-β-alanine), poly(methacrylic acid-graft-β-alanine)
and poly(methacrylic acid-graft-α-methyl-β-alanine) are graft copolymers. Isolation
and characterization of these copolymers by FT-IR, elemental, DSC and TGA analysis.
Fibers were prepared by electrospinning method of these copolymers with 10% (/v)
solution solution for formic acid or mic acid/methanols. By changing the
electrospinning (such as voltage, needle-target, needle) both nano and microfibers
were revealed by SEM. In addition, the appearance of nitrogen atoms in the fibers and
the homogeneity of the predator were revealed by Energy Dispersive X-ray
Spectroscopy (EDX) analysis.
It has been demonstrated that oligomers with olefinic end groups are obtained
by hydrogen transfer polymerization (HTP). It is also known that these oligomeric
structures are functionalized (activated) by chemical modification, the use of this
structure as macromonomer and new block copolymers are obtained. In the thesis
study, oligomeric structures obtained from acrylamide, methacrylamide and
crotonamide by HTP were used as macromonomers. These oligomeric structures and
free radical polymerization of hydrophilic vinyl monomers such as acrylic acid,
methacrylic acid and crotonic acid one by one were studied in solution environment.
In other words, it is aimed to graft macromonomers to homopolymer of vinyl monomer
by predicting that olefin-terminated macromonomers and vinyl monomers will be in
the same chain in free radical polymerization. Thus, the addition of branches with an
amide skeleton to a vinyl polymer ith a carbon skeleton has been achieved.
Synthesis of crotonic acid could not be performed in the synthesis of its three
macromonomers. In addition, homopolymer (PAA and PMA) could be obtained in the
synthesis of poly(β-methyl β-alanine) macromonomer. The synthesis of some of the
graft copolymers has been completed. These; poly(acrylic acid-graft-β-alanine),
poly(acrylic acid-graft-α-methyl-β-alanine), poly(methacrylic acid-graft-β-alanine)
and poly(methacrylic acid-graft-α-methyl-β-alanine) are graft copolymers. Isolation
and characterization of these copolymers by FT-IR, elemental, DSC and TGA analysis.
Fibers were prepared by electrospinning method of these copolymers with 10% (/v)
solution solution for formic acid or mic acid/methanols. By changing the
electrospinning (such as voltage, needle-target, needle) both nano and microfibers
were revealed by SEM. In addition, the appearance of nitrogen atoms in the fibers and
the homogeneity of the predator were revealed by Energy Dispersive X-ray
Spectroscopy (EDX) analysis.
