Radical polymerization in the presence of a peroxide monomer: an approach to branched vinyl polymers

Jiang, Qimin; Li, Jiating; Huang, Wenyan; Zhang, Dongliang; Yang, Hongjun; Xue, Xiaoqiang; Jiang, Bibiao

doi:10.1039/c7py00844a

Cited by 19 publications

(27 citation statements)

References 57 publications

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“…It was previously reported that peroxides can be employed for crosslinking of polymers [18][19][20][21][22]. Their main advantages as crosslinking agents are the (1) ability to crosslink saturated and unsaturated polymers, (2) high-temperature resistance, (3) good elastic behavior at higher temperature, (4) low moisture uptake, and (5) no staining or discoloration of the resulting products.…”

Section: Introductionmentioning

confidence: 99%

Crosslinking of hydrophilic polymers using polyperoxides

et al. 2020

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Hydrogels that can mimic mechanical properties and functions of biological tissue have attracted great interest in tissue engineering and biofabrication. In these fields, new materials and approaches to prepare hydrogels without using toxic starting materials or materials that decompose into toxic compounds remain to be sought after. Here, we report the crosslinking of commercial, unfunctionalized hydrophilic poly(2-ethyl-2-oxazoline) using peroxide copolymers in their melt. The influence of temperature, peroxide copolymer concentration, and duration of the crosslinking process has been investigated. The method allows to create hydrogels from unfunctionalized polymers in their melt and to control the mechanical properties of the resulting materials. The design of hydrogels with a suitable mechanical performance is of crucial importance in many existing and potential applications of soft materials, including medical applications.

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Section: Introductionmentioning

confidence: 99%

Crosslinking of hydrophilic polymers using polyperoxides

et al. 2020

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“…Moreover, LCHBPs can also be easily afforded through certain copolymerizations by using high molecular weight macromonomers or small molecular monomers, or simultaneously both, as building blocks via A 2 + B x ( x ≥ 3) or AB + AB x ( x ≥ 2) copolymerization process . Additionally, the famous self‐condensing vinyl polymerization (SCVP) usually affording conventional HBPs with short subchains has been adjusted for the preparation of LCHBPs through copolymerization of the traditional small molecular inimer with an additional comonomer, or direct homopolymerization of a macroinimer …”

Section: Introductionmentioning

confidence: 99%

Long‐Chain Hyperbranched Polymers: Synthesis, Properties, and Applications

Liu

Tian

2018

Macromol. Rapid Commun.

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By combining the virtues of conventional linear and hyperbranched polymers, long‐chain hyperbranched polymers (LCHBPs) have attracted great attention. Therefore, a comprehensive summary of the research progress of LCHBPs is presented, with a particular focus on their synthetic strategies, unique properties, and potential applications. The synthetic methodologies are rationalized into four main classes according to their construction process or mechanism, namely ABx (x ≥ 2), A2 + Bx (x ≥ 3), AB + ABx (x ≥ 2), and self‐condensing vinyl polymerization. Some of their rheological properties, self‐assembly behavior, and stimuli‐response features are then discussed. Finally, the emergent applications including biomedicine, electrical conductivity, chemical sensing, and catalyst carrier, are outlined. It is anticipated that this review will stimulate more inspiration for advancing the development of this novel kind of LCHBP.

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“…The successive initiation and polymerization of the formed macromolecular reducing agent and macromonomer will generate branching structure. We note that RAM can really form two kinds of radicals: >N‐CH • ‐CH 2 ‐CH 2 ‐ (signal g at about chemical shift 2.6 ppm) and >N‐CH 2 • (at about chemical shift 3.0 ppm), indicating that the polymerization functionality of the RAM may be larger than 3, which is quite different from CTM and peroxide monomer, implying that this polymerization system may be easy to suffer from gelation compared to that reported in the literature, where the polymerization functionality of the CTM and the peroxide monomer is usually 3 . Correspondingly, branched polymers with moderate branching degree can be prepared at low branching monomer dosage.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, whereas Michael addition occurs between the –SH group and the vinyl group during storage and polymerization of CTM, it does not contribute to the branching. To solve these drawbacks, a peroxide monomer t ert‐butyl peroxyacetate (BPAMA) have been designed to prepare branched vinyl polymers through radical polymerization under solvent‐free conditions, which makes the preparation of branched vinyl polymers almost equally as simple as those of their linear analogs . Nevertheless, the polymerization still suffers from gelation at high BPAMA concentration, the reaction system must be introduced in DDT controlling the primary chain length and preventing gelation, results in the formation of branched polymers with low molecular weights and board polydispersities because of chain‐transfer reaction.…”

Section: Introductionmentioning

confidence: 99%

Radical polymerization in the presence of peroxide and reducing agent monomer for branched polymers

Jiang

Huang

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

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In this article, we report the radical polymerization in the presence of peroxide and commercially available or designed reducing agent monomer (RAM) for the preparation of branched poly(methyl methacrylate)s (PMMAs). The reaction behavior of the RAM was studied by NMR. Triple‐detection SEC (TD‐SEC) analysis was used to confirm the branching structure of the prepared PMMAs and to investigate the influence of peroxide concentration and RAM concentration on molecular weight and branched structure. The obtained branched PMMAs exhibited high molecular weights and relatively narrow polydispersities at high conversion of MMA. Interestingly, a significant increase in molecular weight and degree of branching of the obtained polymers are observed in higher BPO concentration, these results are quite different from that reported in the literature. The unique radical polymerization mechanism in the RAM/BPO redox‐initiated radical polymerization system resulted in branched PMMAs with high molecular weights at relatively high RAM and BPO concentrations. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 833–840

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Radical polymerization in the presence of a peroxide monomer: an approach to branched vinyl polymers

Abstract: In this paper, we report radical polymerization in the presence of a peroxide monomer for the preparation of branched vinyl polymers.

Cited by 19 publications

References 57 publications

Crosslinking of hydrophilic polymers using polyperoxides

Crosslinking of hydrophilic polymers using polyperoxides

Long‐Chain Hyperbranched Polymers: Synthesis, Properties, and Applications

Radical polymerization in the presence of peroxide and reducing agent monomer for branched polymers

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