Synthesis of graft copolyimides via controlled radical polymerization of methacrylates with a polyimide macroinitiator

Мелешко, Т. К.; Ilgach, D. M.; Богорад, Н. Н.; Kukarkina, N. V.; Yakimansky, Alexander V.

doi:10.1134/s1560090414020110

Cited by 26 publications

(11 citation statements)

References 16 publications

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“…Therefore, the thermodynamic quality of the solvent with respect to the backbone and side chains plays an important role. The solution behavior of amphiphilic graft copolymers has been studied for aromatic polyimides grafted with vinyl polymers such as polystyrene, polymethylmethacrylate, poly-tert-butyl acrylates, their copolymers with polymethacrylic acid [ 21 , 22 , 23 , 24 , 25 ], and enzymatically synthesized polyesters grafted with hydrophilic and hydrophobic side chains [ 26 ]. It is shown that copolymers with a low grafting density tend to form supramolecular structures due to aggregation of the polyimide backbones.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains

et al. 2020

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New thermoresponsive graft copolymers with an aromatic polyester backbone and poly(2-isopropyl-2-oxazoline) (PiPrOx) side chains are synthesized and characterized by NMR and GPC. The grafting density of side chains is 0.49. The molar masses of the graft-copolymer, its backbone, side chains, and the modeling poly-2-isopropyl-2-oxaziline are 74,000, 19,000, 4300, and 16,600 g·mol−1, respectively. Their conformational properties in nitropropane as well as thermoresponsiveness in aqueous solutions are studied and compared with that of free side chains, i.e., linear PiPrOx with a hydrophobic terminal group. In nitropropane, the graft-copolymer adopts conformation of a 13-arm star with a core of a collapsed main chain and a PiPrOx corona. Similarly, a linear PiPrOx chain protects its bulky terminal group by wrapping around it in a selective solvent. In aqueous solutions at low temperatures, graft copolymers form aggregates due to interaction of hydrophobic backbones, which contrasts to molecular solutions of the model linear PiPrOx. The lower critical solution temperature (LCST) for the graft copolymer is around 20 °C. The phase separation temperatures of the copolymer solution were lower than that of the linear chain counterpart, decreasing with concentration for both polymers.

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Section: Introductionmentioning

confidence: 99%

Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains

et al. 2020

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“…A new direction in backbone design that has been under development in recent years is the search for synthetic approaches to molecular brushes based on widely used hi tech thermally stable polycondensa tion type polymers, such as aromatic polysulfones, poly(phenylene oxide), and aromatic polyimides [133][134][135][136][137][138][139]. Different thermodynamic properties of arylene containing polycondensation type main chains and carbon chain side chains in these polymer brushes are responsible for their clearly pronounced diphilic character.…”

Section: Polymer Brushes With Non Carbon Chain Backbonesmentioning

confidence: 99%

“…Another example is the analogous grafting of poly[(meth)acrylates] and polystyrene side chains onto multicenter macroinitiators based on aromatic polyimides [135][136][137][138][139][140].…”

Section: Polymer Brushes With Non Carbon Chain Backbonesmentioning

confidence: 99%

“…A regular grafting of side chains onto polycon densation type polymers makes it possible to signifi cantly increase the distance between them, because polycondensation type polymers have substantially longer repeat units. For example, the length of the repeat unit of the backbone of polyimide brushes [136][137][138][139] is ~2 nm. This value is an order of magni tude longer than the length of the monomer unit of polyvinyl main chains of carbon chain polymer brushes.…”

Section: Polymer Brushes With Non Carbon Chain Backbonesmentioning

confidence: 99%

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Methods of controlled radical polymerization for the synthesis of polymer brushes

2015

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Methods for the synthesis of polymer (molecular) brushes via various controlled radical poly merization approaches are considered, and their properties are analyzed. Special attention is paid to atom transfer radical polymerization, which is most frequently used for these purposes. The potential of the syn thesis of molecular brushes with various chemical structures, including amphiphilic brushes, is demonstrated in many examples.

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“…PI was used as a macroinitiator in the controlled radical polymerization of vinyl monomers to give rise to new polymer brushes [271][272][273][274][275].…”

Section: Dendrimersmentioning

confidence: 99%

Achievements in polycondensation and condensation polymers

Sapozhnikov

Vygodskii

2015

Polym. Sci. Ser. B

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Synthesis of graft copolyimides via controlled radical polymerization of methacrylates with a polyimide macroinitiator

Cited by 26 publications

References 16 publications

Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains

Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains

Methods of controlled radical polymerization for the synthesis of polymer brushes

Achievements in polycondensation and condensation polymers

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