Synthesis and thermal characterization of macromonomeric azo initiator containing poly(epsilon-caprolactone): Styrene and methyl methacrylate copolymerization

Macromonomeric azo initiator containing biodegradable poly(epsilon-caprolactone, (PCL) was synthesized by the condensation reaction of PCL with 4,4'-azobis(4-cyanopentanoyl chloride) and methacryloyl chloride. This macromonomeric azo initiator (MIM-PCL) was further used in the polymerization of styrene (St) or methylmethacrylate (MMA) via a radical initiated process at 60 degrees C in bulk in order to obtain polystyrene (PS)-b-PCL or poly(methyl methacrylate) (PMMA)-b-PCL crosslinked block copolymers. Thermal decomposition kinetics of MIM-PCL and its copolymers were studied by using thermogravimetric analysis and differential scanning calorimetry (DSC). DSC traces of MIM-PCL showed two different exotherms, at 98 and 127 degrees C, The first exotherm, observed at 98 degrees C, was due to the polymerization of the terminal methacrylic groups; the other was due to the exothermic decomposition of azo groups of MIM-PCL. PCL-b-PS and PCL-b-PMMA crosslinked block copolymers showed single glass transition temperatures due to the compatibility of the crosslinked block segments. The polymer-solvent interaction parameter of PCL in chloroform was determined by vapor pressure osmometry to be 0.1 for the PCL-chloroform system at 30 degrees C. The average molecular weights between junction points of crosslinked homo PCL were calculated by using the Flory-Rehner equation. (C) 1998 John Wiley & Sons, Inc.

Dergi Adı JOURNAL OF APPLIED POLYMER SCIENCE
Dergi Cilt Bilgisi 68
Dergi Sayısı 7
Sayfalar 1149 - 1157
Yayın Yılı 1998
Eser Adı
[dc.title]
Synthesis and thermal characterization of macromonomeric azo initiator containing poly(epsilon-caprolactone): Styrene and methyl methacrylate copolymerization
Yazar
[dc.contributor.author]
Eroğlu, Mehmet S.
Yazar
[dc.contributor.author]
Hazer, Baki
Yazar
[dc.contributor.author]
Baysal, Bahattin M.
Yayın Yılı
[dc.date.issued]
1998
Yayıncı
[dc.publisher]
JOHN WILEY & SONS INC
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Macromonomeric azo initiator containing biodegradable poly(epsilon-caprolactone, (PCL) was synthesized by the condensation reaction of PCL with 4,4'-azobis(4-cyanopentanoyl chloride) and methacryloyl chloride. This macromonomeric azo initiator (MIM-PCL) was further used in the polymerization of styrene (St) or methylmethacrylate (MMA) via a radical initiated process at 60 degrees C in bulk in order to obtain polystyrene (PS)-b-PCL or poly(methyl methacrylate) (PMMA)-b-PCL crosslinked block copolymers. Thermal decomposition kinetics of MIM-PCL and its copolymers were studied by using thermogravimetric analysis and differential scanning calorimetry (DSC). DSC traces of MIM-PCL showed two different exotherms, at 98 and 127 degrees C, The first exotherm, observed at 98 degrees C, was due to the polymerization of the terminal methacrylic groups; the other was due to the exothermic decomposition of azo groups of MIM-PCL. PCL-b-PS and PCL-b-PMMA crosslinked block copolymers showed single glass transition temperatures due to the compatibility of the crosslinked block segments. The polymer-solvent interaction parameter of PCL in chloroform was determined by vapor pressure osmometry to be 0.1 for the PCL-chloroform system at 30 degrees C. The average molecular weights between junction points of crosslinked homo PCL were calculated by using the Flory-Rehner equation. (C) 1998 John Wiley & Sons, Inc.
Açıklama
[dc.description]
WOS: 000073137800012
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
PCL
Konu Başlıkları
[dc.subject]
macroinitiator
Konu Başlıkları
[dc.subject]
crosslinked block copolymer
Konu Başlıkları
[dc.subject]
biodegradable copolymer
Künye
[dc.identifier.citation]
Eroğlu, M. S., Hazer, B. ve Baysal, B. M. (1998). Synthesis and thermal characterization of macromonomeric azo initiator containing poly(ε-caprolactone): Styrene and methyl methacrylate copolymerization. Journal of Applied Polymer Science, 68(7), 1149–1157. doi:10.1002/(SICI)1097-4628(19980516)68:7<1149::AID-APP12>3.0.CO;2-T
Haklar
[dc.rights]
info:eu-repo/semantics/openAccess
ISSN
[dc.identifier.issn]
0021-8995
İlk Sayfa Sayısı
[dc.identifier.startpage]
1149
Son Sayfa Sayısı
[dc.identifier.endpage]
1157
Dergi Adı
[dc.relation.journal]
JOURNAL OF APPLIED POLYMER SCIENCE
Dergi Sayısı
[dc.identifier.issue]
7
Dergi Cilt Bilgisi
[dc.identifier.volume]
68
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/3414
Tek Biçim Adres
[dc.identifier.uri]
https://doi.org/10.1002/(SICI)1097-4628(19980516)68:7<1149::AID-APP12>3.0.CO;2-T
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degrees crosslinked MIM-PCL copolymers decomposition polymerization showed initiator groups PCL-b-PMMA polymer-solvent segments exotherm compatibility observed terminal temperatures single methacrylic transition exothermic PCL-b-PS interaction Macromonomeric parameter junction equation Flory-Rehner calculated points between chloroform weights molecular average
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