A Novel Bifunctional Addition-Fragmentation Agent for Photoinitiated Cationic Polymerization

Yaǧcı, Yusuf; Yıldırım, Suat; Önen, Aysęn

doi:10.1002/1521-3935(20010201)202:4<527::aid-macp527>3.0.co;2-2

Cited by 25 publications

(11 citation statements)

References 13 publications

(13 reference statements)

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“…As stated in the introduction, the photolysis of terminal benzoin groups of polymers in the presence of a second monomer is an elegant way of preparing block copolymers 37. In the second stage, block copolymers are synthesized with the obtained photoactive polymers.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of liquid crystalline–amorphous block copolymers by the combination of atom transfer and photoinduced radical polymerization mechanisms

Serhatlı¹,

Kacar²,

Önen³

2003

J. Polym. Sci. A Polym. Chem.

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The synthesis of ABA-type block copolymers, involving liquid-crystalline 6-(4-cyanobiphenyl-4Ј-oxy)hexyl acrylate (LC6) and styrene (St) monomer with copperbased atom transfer radical polymerization (ATRP) and photoinduced radical polymerization (PIRP), was studied. First, photoactive ␣-methylol benzoin methyl ether was esterified with 2-bromopropionyl bromide, and it was subsequently used for ATRP of LC6 in diphenylether in conjunction with CuBr/N,N,NЈ,NЉ,NЉ-pentamethyldiethylenetriamine as a catalyst. The obtained photoactive functional liquid-crystalline polymer, poly[6-(4-cyanobiphenyl-4Ј-oxy)hexyl acrylate] (PLC6), was used as an initiator in PIRP of St. Similarly, photoactive polystyrenes were also synthesized and employed for the block copolymerization of LC6 in the second stage. The spectral, thermal, and optical measurements confirmed a full combination of ATRP and PIRP, which resulted in the formation of ABA-type block copolymers with very narrow polydispersities.

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Section: Resultsmentioning

confidence: 99%

Synthesis of liquid crystalline–amorphous block copolymers by the combination of atom transfer and photoinduced radical polymerization mechanisms

Serhatlı¹,

Kacar²,

Önen³

2003

J. Polym. Sci. A Polym. Chem.

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“…In our previous studies, we have combined a wide range of polymerization methods to prepare block copolymers by the so called transformation approach. The successful combinations include cation to radical,8–11 anion to radical,12 radical to radical 13–15. Click chemistry, extensively used in polymer chemistry because of the high efficiency and technical simplicity of the reaction, has also been shown as an alternative route for combining different polymerization methods 16–18…”

Section: Introductionmentioning

confidence: 99%

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Durmaz

Küküt

Moszner

et al. 2009

J. Polym. Sci. A Polym. Chem.

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A block copolymer of cyclohexene oxide (CHO) and styrene (St) was prepared by using bifunctional visible light photoinitiator dibenzoyldiethylgermane (DBDEG) via a two‐step procedure. The bifunctionality of the photoinitiator pertains to the sequential photodecomposition of DBDEG through acyl germane bonds. In the first step, photoinitiated free radical promoted cationic polymerization of CHO using DBDEG in the presence of diphenyliodonium hexafluorophosphate (Ph2I+PF 6−) was carried out to yield polymers with photoactive monobenzoyl germane end groups. These poly(cyclohexene oxide) (PCHO) prepolymers were used to induce photoinitiated free radical polymerization of styrene (St) resulting in the formation of poly(cyclohexene oxide‐block‐styrene) (P(CHO‐b‐St)). Successful blocking has been confirmed by a strong change in the molecular weight of the prepolymer and the block copolymer as well as NMR, IR, and DSC spectral measurements. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 4793–4799, 2009

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“…Afterwards, thus obtained polymers can be exposed to UV irradiation to produce radicals at their chain ends that is capable of initiating free radical polymerization. To exemplify, a specifically designed compound having both thermally and photochemically active centers is a useful tool for the application of strategy [34][35][36][37]. Yagci and co-workers developed an azobenzoin compound possessing both benzoin and diazo-groups in the structure.…”

Section: Combination Of Photoinduced Radical Polymerization With Tradmentioning

confidence: 99%

Multi-mode Polymerizations Involving Photoinduced Radical Polymerization

Yılmaz

Yaǧcı

2018

J. Photopol. Sci. Technol.

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Multi-mode polymerizations provide a facile route to synthesis of block and graft copolymers that cannot be made by a single polymerization mode. In such strategy, photoinduced free radical polymerization as one of the polymerization mode play a crucial role due to its simplicity, wavelength flexibility, applicability to wide range of monomers and minimized side reactions. In this article, various combinations of photoinduced conventional and controlled/living radical polymerizations with other polymerization methods, namely cationic, free radical promoted cationic, ring opening, and ring opening metathesis polymerizations are presented and mechanistic details are evaluated. Moreover, the possibilities for the simultaneous or sequential processes are discussed.

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A Novel Bifunctional Addition-Fragmentation Agent for Photoinitiated Cationic Polymerization

Cited by 25 publications

References 13 publications

Synthesis of liquid crystalline–amorphous block copolymers by the combination of atom transfer and photoinduced radical polymerization mechanisms

Synthesis of liquid crystalline–amorphous block copolymers by the combination of atom transfer and photoinduced radical polymerization mechanisms

Sequential photodecomposition of bisacylgermane type photoinitiator: Synthesis of block copolymers by combination of free radical promoted cationic and free radical polymerization mechanisms

Multi-mode Polymerizations Involving Photoinduced Radical Polymerization

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