The synthesis and properties of a series of aromatic dendritic polyamides

Bayliff, Patrique M.; Feast, W. James; Parker, David

doi:10.1007/bf00944817

Cited by 39 publications

(29 citation statements)

References 6 publications

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“…The coupling reaction of the dendrons with a core molecule, such as p ‐phenylenediamine, gave a corresponding dendrimer (Scheme ). Similarly to the case reported by Feast and coworkers,9, 10 the yield of high‐generation dendrimers decreased, probably because of steric hindrance at a focal point. The structure of the polyamide dendrons and dendrimers was confirmed by 1 H NMR, 13 C NMR, and matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF MS) measurements.…”

Section: Preparation Of Dendritic Polyamidessupporting

confidence: 76%

“…Only brief comments on NMR, mass spectrometry, and gel permeation chromatography (GPC) data were described in the text for the polyamide dendrimers ( 1 and 2 ). Feast and coworkers9, 10 reported the synthesis and detailed characterization of aromatic polyamide dendrimers ( 1 , 2 , and 3 ). The peak splitting of aromatic protons derived from inner aromatic rings was observed in an 1 H NMR spectrum for compound 2 , suggesting sterically restricted rotation of inner amide bonds.…”

Section: Preparation Of Dendritic Polyamidesmentioning

confidence: 99%

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Dendritic aromatic polyamides and polyimides

Jikei

Kakimoto

2004

J. Polym. Sci. A Polym. Chem.

130

113

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ABSTRACT:The syntheses and properties of dendritic and hyperbranched aromatic polyamides and polyimides are reviewed. In addition to conventional stepwise reactions for dendrimer synthesis, an orthogonal/double-stage convergent approach and dendrimer syntheses with unprotected building blocks are described as new synthetic strategies for dendritic polyamides. Hyperbranched polyamides and polyimides composed of various repeating units are presented. Besides the self-polycondensation of AB 2 -type monomers, new polymerization systems with AB 4 , AB 8 , A 2 ϩ B 3 , and A 2 ϩ BBЈ 2 monomers have been developed for hyperbranched polyamides and polyimides. The copolymerization of AB 2 and AB monomers is discussed separately with respect to the effects of branching units on the properties.

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Section: Preparation Of Dendritic Polyamidessupporting

confidence: 76%

Section: Preparation Of Dendritic Polyamidesmentioning

confidence: 99%

Dendritic aromatic polyamides and polyimides

Jikei

Kakimoto

2004

J. Polym. Sci. A Polym. Chem.

130

113

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“…Other workers in the field have also employed the convergent growth approach, notably Miller and Neenan who have independently reported the convergent synthesis of dendritic polyphenylenes [23], polyesters [24], and polyamides [25]. Several other groups have also used the convergent growth approach to prepare a variety of materials such as polyamides [26], polyetherketones [27,28], polyphenylacetylenes [29], polysiloxanes [30], dendritic nucleic acids [31], dendritic polyradicals [32], organometallics [33], polyethers with a porphyrin core [34], etc.…”

Section: Repeal Coupling and Activation Stepsmentioning

confidence: 99%

The Convergent Route to Globular Dendritic Macromolecules: A Versatile Approach to Precisely Functionauzed Three-Dimensional Polymers and Novel Block Copolymers

Fréchet¹,

Hawker²,

Wooley³

1994

Journal of Macromolecular Science, Part A

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The convergent growth approach to dendritic macromolecules is a versatile method for the preparation of globular molecules with highly controlled three-dimensional architectures. The method, inspired from a classical organic disconnection approach, starts growth of the globular dendrimer at what will become its chain-ends and proceeds toward what will become its center. The convergent growth has been applied to the preparation of a number of unconventional dendritic block copolymers as well as hybrid globular-linear copolymers that are not readily accessed by other routes. Control of the chemistry and the precise location of the chain-ends in convergent dendrimers is essential for the preparation of micellar, amphiphilic, dipolar, or other structures that may be useful in applications as varied as drug delivery and molecular devices. fCurrent address:

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“…In recent years, a number of dendritic polyamides have been synthesized with easy methods 14–18. However, only a few of the dendronized polyamides were reported.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of dendronized aromatic polyamides with bromomethyl groups in the periphery

Miao

Wang

Zhou

et al. 2008

J of Applied Polymer Sci

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This paper focused on the synthesis of novel functionalized dendronized aromatic polyamides, which contained a polyamide backbone and polyamide dendrons decorated with bromomethyl groups, by the macromonomer route. The new activating procedure of the synthesis of dendrons and macromonomers using thionyl chloride as an activating agent eliminated the protection/deprotection procedure and reduced side reactions. The structures of the dendrons, macromonomers, and polyamides were confirmed by FTIR, 1 H NMR, 13 C NMR, and elemental analysis. The properties of the resulting dendronized polyamides, which were compared with that of the linear polyamide (LP), were studied using GPC, XRD, TGA, DSC, inherent viscosity measurement, and solubility experiment.

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The synthesis and properties of a series of aromatic dendritic polyamides

Cited by 39 publications

References 6 publications

Dendritic aromatic polyamides and polyimides

Dendritic aromatic polyamides and polyimides

The Convergent Route to Globular Dendritic Macromolecules: A Versatile Approach to Precisely Functionauzed Three-Dimensional Polymers and Novel Block Copolymers

Synthesis and characterization of dendronized aromatic polyamides with bromomethyl groups in the periphery

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