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Polymer Bulletin
Erschienen in: Polymer Bulletin 1/2017

30.05.2016 | Original Paper

Synthesis of benzoin end-chain functional macrophotoinitiator of poly(d,l-lactide) homopolymer and poly(ε-caprolactone)-poly(d,l-lactide) diblock copolymer by ROP and their use in photoinduced free radical promoted cationic copolymerization

verfasst von: Mustafa Degirmenci, Nalan Benek, Mustafa Durgun

Erschienen in: Polymer Bulletin | Ausgabe 1/2017

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Abstract

Benzoin (B) end-chain functional macrophotoinitiator of poly(d,l-lactide) homopolymer (B-PDLLA) and poly(ε-caprolactone)-poly(d,l-lactide) (B-PCL-b-PDLLA) diblock copolymer with controlled molecular weights and low polydispersities have been synthesized via ring-opening polymerization (ROP). The ROP of d,l-lactide with benzoin as the initiator and tin octoate (Sn(Oct)2) as the catalyst in bulk at 130 °C formed B-PDLLA polymer. B-PCL-b-PDLLA was synthesized by sequential ROP in two steps. Benzoin (B) end-chain functional macrophotoinitiator of poly(ε-caprolactone) (B-PCL) was first prepared via ROP of ε-caprolactone by using benzoin/Sn(Oct)2 initiating system. The resultant hydroxyl-terminated B-PCL macrophotoinitiator was subsequently utilized as the macroinitiator in the second-step ROP of d,l-lactide to synthesize B-PCL-b-PDLLA. The 1H NMR, FT-IR, GPC, UV, and fluorescence spectroscopic studies revealed that low-polydispersity poly(d,l-lactide) homopolymer and poly(ε-caprolactone)-poly(d,l-lactide) diblock copolymer with benzoin end-groups were obtained. These macrophotoinitiators were used as prepolymers in photoinitiated free radical promoted cationic polymerization for obtaining AB type di- and ABC type tri-block copolymers.
Vorheriger Artikel Quiescent and shear-induced non-isothermal crystallization of isotactic polypropylene-based nanocomposites
Nächster Artikel Preparation of pH-sensitive amphiphilic block star polymers, their self-assembling characteristics and release behavior on encapsulated molecules

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Metadaten
Titel
Synthesis of benzoin end-chain functional macrophotoinitiator of poly(d,l-lactide) homopolymer and poly(ε-caprolactone)-poly(d,l-lactide) diblock copolymer by ROP and their use in photoinduced free radical promoted cationic copolymerization
verfasst von
Mustafa Degirmenci
Nalan Benek
Mustafa Durgun
Publikationsdatum
30.05.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
Polymer Bulletin / Ausgabe 1/2017
Print ISSN: 0170-0839
Elektronische ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-016-1706-3

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