Synthesis of Hydroxy-Terminated Polyethylene via Controlled Chain Transfer Reaction and Poly(ethylene-<i>b</i>-caprolactone) Block Copolymer

Han, Chul Jong; Lee, Mong Sup; Byun, Doo-Jin; Kim, Sang Youl

doi:10.1021/ma025565p

Cited by 97 publications

(67 citation statements)

References 18 publications

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“…The fabrication of polyethylene nanofibers/ribbons through the block copolymer approach has not been reported yet 18. 19 End‐group‐functionalized PE synthesized by CCTP was already used to make block copolymers,5d,e, 9c, 20 among them PE‐PLA block copolymers 5e…”

Section: Initial Polymerization Studies By Using Complex a Conditionmentioning

confidence: 99%

Tailored Nanostructuring of End‐Group‐Functionalized High‐Density Polyethylene Synthesized by an Efficient Catalytic Version of Ziegler’s “Aufbaureaktion”

Pillai

Kretschmer

Trebbin

et al. 2012

Chemistry A European J

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Section: Initial Polymerization Studies By Using Complex a Conditionmentioning

confidence: 99%

Tailored Nanostructuring of End‐Group‐Functionalized High‐Density Polyethylene Synthesized by an Efficient Catalytic Version of Ziegler’s “Aufbaureaktion”

Pillai

Kretschmer

Trebbin

et al. 2012

Chemistry A European J

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“…Lately, by choosing a non-bridged zirconocene catalyst possessing sterically bulky ligands ((Me 5 Cp) 2 ZrCl 2 ) and controlling the polymerization temperatures relatively low, Han et al [35] successfully refrained β-H transfer reaction in ethylene polymerization and directed the chain transfer mode to a selective transfer reaction to aluminum cocatalyst, which resulted in aluminum-terminated polyethylene. Metallocene catalyst has the features of a single active site, which results in narrowly distributed molecular weight and composition of the obtained polyolefins, and well-defined yet easily adjustable structure.…”

Section: Design and Synthesis Of Terminally Functionalized Polypropylmentioning

confidence: 99%

Design and synthesis of structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization chemistry

Dong

2006

Front. Chem. China

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Design and synthesis of structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization chemistry Abstract Functionalization of polyolefins is an industrially important yet scientifically challenging research subject. This paper summarizes our recent effort to access structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization. In one approach, polypropylenes containing side chain functional groups of controlled concentrations were obtained by Ziegler-Natta-catalyzed copolymerization of propylene in combination with either living anionic or controlled radical polymerization of polar monomers. The copolymerization of propylene with 1,4-divinylbenzene using an isospecific MgCl 2 -supported TiCl 4 catalyst yielded polypropylenes containing pendant styrene moieties. Both metalation reaction with n-butyllithium and hydrochlorination reaction with dry hydrogen chloride selectively and quantitatively occurred at the pendant reactive sites, generating polymeric benzyllithium and 1-chloroethylbenzene species. These species initiated living anionic polymerization of styrene (S) and atom transfer radical polymerization (in the presence of CuCl and pentamethyldiethylenetriamine) of methyl methacrylate (MMA), respectively, resulting in functional polypropylene graft copolymers (PP-g-PS and PP-g-PMMA) with controllable graft lengths. In another approach, chain end-functionalized polypropylenes containing a terminal OH-group with controlled molecular weights were directly prepared by propylene polymerization with a metallocene catalyst through a selective aluminum chain transfer reaction. Both approaches proved to be desirable polyolefin functionalization routes in terms of efficiency and polymer structure controllability.

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“…[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] This method is a general one opening new horizons for the synthesis of well-defined PE-based polymeric materials with different macromolecular architectures.…”

Section: Introductionmentioning

confidence: 99%

Well-defined polymethylene-based block co/terpolymers by combining anthracene/maleimide diels–alder reaction with polyhomologation

Alkayal

Hadjichristidis

2015

Polym. Chem.

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ARTICLE This journal isA novel strategy towards well-defined polymethylene-based co/terpolymers, by combining anthracene/maleimide Diels-Alder reaction with polyhomologation, is presented. For the synthesis of diblock copolymers the following approach was applied: a) synthesis of α-anthracene-ω-hydroxypolymethylene by polyhomologation using tri (9-anthracene-methyl propyl ether) borane as initiator, b) synthesis of furan-protected-maleimide-terminated poly (ε-caprolactone) or polyethylene glycol and c). Diels-Alder reaction between the anthracene and maleimide-terminated polymers. In the case of triblock terpolymers the α-anthracene-ω-hydroxy-polymethylene was used as macroinitiator for the ringopening polymerization of D, L-lactide to afford an anthracene-terminated PM-b-PLA copolymer, followed by Diels-Alder reaction with furan-protected maleimide-terminated poly (ε-caprolactone) or polyethylene glycol to give the triblock terpolymers. All intermediate and final products were characterized by SEC, 1 H NMR, UV-VIS spectroscopy and DSC.

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Synthesis of Hydroxy-Terminated Polyethylene via Controlled Chain Transfer Reaction and Poly(ethylene-b-caprolactone) Block Copolymer

Cited by 97 publications

References 18 publications

Tailored Nanostructuring of End‐Group‐Functionalized High‐Density Polyethylene Synthesized by an Efficient Catalytic Version of Ziegler’s “Aufbaureaktion”

Tailored Nanostructuring of End‐Group‐Functionalized High‐Density Polyethylene Synthesized by an Efficient Catalytic Version of Ziegler’s “Aufbaureaktion”

Design and synthesis of structurally well-defined functional polypropylenes via transition metal-mediated olefin polymerization chemistry

Well-defined polymethylene-based block co/terpolymers by combining anthracene/maleimide diels–alder reaction with polyhomologation

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