Electrospinning of linear and highly branched segmented poly(urethane urea)s

McKee, Matthew G.; Park, Taigyoo; Ünal, Serkan; Yilgör, Iskender; Long, Timothy Edward

doi:10.1016/j.polymer.2005.01.028

Cited by 81 publications

(62 citation statements)

References 27 publications

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“…Long and coworkers [55] showed, that linear and highly branched segmented poly(urethane urea)s are interesting materials for the electrospinning process, yielding elastic fibers. Fibers from highly branched polyurethanes showed an elongation rate of 1 300% without break, whereas fibers from linear analogs broke at 970%.…”

Section: Electrospinningmentioning

confidence: 99%

Dendritic Polymers Based on Urethane Chemistry – Syntheses and Applications

Bruchmann

2007

Macro Materials & Eng

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The development of dendritic polymers, including dendrimers as well as hyperbranched or highly branched polymers, is rapidly growing in all fields of polymer chemistry. This review article focuses on dendritic polymers based on urethane chemistry as a principle of construction, summarizing synthetic approaches based on isocyanate chemistry as well as on isocyanate free processes. Furthermore, scientific publications and patent literature were investigated to provide a comprehensive overview of applications where dendritic polyurethanes show their specific chemical and physical potential.

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Section: Electrospinningmentioning

confidence: 99%

Dendritic Polymers Based on Urethane Chemistry – Syntheses and Applications

Bruchmann

2007

Macro Materials & Eng

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“…[18] Previous studies have reported the development of branched polymer fibers by electrospinning from a melt [19,20] or solution. [21,22] Branched polymers possess a smaller hydrodynamic volume in comparison to linear polymers with equivalent M w and consequently they show a larger polymer concentration corresponding to a polymer chain entanglement sufficient for the formation of defect-free electrospun fibers. [21,23] McKee et al [21] studied the influence of polymer branching on electrospun fiber formation from solution and the relationship between solution rheological properties and electrospinning of branched polymers.…”

Section: Introductionmentioning

confidence: 99%

Development of Electrospun Three‐arm Star Poly(ε‐caprolactone) Meshes for Tissue Engineering Applications

Puppi

Detta

Piras

et al. 2010

Macromolecular Bioscience

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We have developed three‐dimensional electrospun microfibrous meshes of a novel star branched three‐arm poly(ε‐caprolactone) (*PCL) as potential scaffolds for tissue engineering applications. The processing conditions required to obtain uniform fibers were optimized by studying their influence on fiber morphology and size. Polymer molecular weight and solution feed rate influenced both the mesh microstructure and the tensile properties of the developed mats. Electrospun samples were also tested for their mechanical properties in wet conditions, showing higher yield strength and strain in comparison to that observed in dry conditions. Cell culture experiments employing MC3T3‐E1 osteoblast like cells showed good cell viability adhesion and collagen production on the *PCL scaffolds.

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“…39,61,62 The copolymerization of hyperbranched monomers as the random component of the block copolymer results in controlled branching and enhanced linear polymer properties. 63,64 Hyperbranched polymers are frequently used as the core of core-shell block copolymers, where the shell block is grown from the functional groups of the hyperbranched polymer. [65][66][67] Hyperbranched polymers have also been grown from linear polymers to form diblock, 68 gridlock 69,70 and graft copolymers.…”

Section: Preparation Of Hyperbranchedàlinear Pes Multiblock Copolymersmentioning

confidence: 99%

Hyperbranched poly(ether sulfone)s: preparation and application to ion-exchange membranes

Kakimoto

Grunzinger

Hayakawa

2010

Polym J

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Hyperbranched polymers possess unique characteristics such as low viscosity, high solubility in organic solvents and a high degree of functionality at the terminal position. However, hyperbranched polymers also possess weak mechanical properties. In this study, hyperbranched poly(ether sulfone)s (HBPES) possessing sulfonic acid moieties at the terminal position were prepared by reacting electrophilic sulfonium ions with electron-rich benzene rings from two kinds of AB 2 monomers. To address the weakness of HBPES, hybrid materials containing linear and hyperbranched PES were investigated. Linear and hyperbranched multiblock copolymers were successfully prepared by reacting oligomeric linear PES and AB 2 monomers. From the multiblock copolymers, linear and hyperbranched PES blends were prepared and applied as ion-exchange membranes for fuel cells. Films containing various ratios of linear and hyperbranched PES terminated by sulfonyl chloride groups were prepared via casting from a solution of DMAc. The results indicated that tethers between linear and hyperbranched polymers were important for controlling the size of the phases and for preventing the dissolution of HBPES in water; thus, linear and hyperbranched polymers were crosslinked by simply heating blends of both films. Finally, hybrid films containing sulfonic acid groups were obtained by hydrolyzing the sulfonyl chloride moieties. The resultant films showed ion-exchange capacities that were comparable to that of a Nafion 117 membrane (Dupont, Tokyo, Japan).

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Electrospinning of linear and highly branched segmented poly(urethane urea)s

Cited by 81 publications

References 27 publications

Dendritic Polymers Based on Urethane Chemistry – Syntheses and Applications

Dendritic Polymers Based on Urethane Chemistry – Syntheses and Applications

Development of Electrospun Three‐arm Star Poly(ε‐caprolactone) Meshes for Tissue Engineering Applications

Hyperbranched poly(ether sulfone)s: preparation and application to ion-exchange membranes

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