Introduction to Synthetic Methods in Step‐Growth Polymers

Rogers, Martin E.; Long, Timothy Edward; Turner, S. Richard

doi:10.1002/0471220523.ch1

Cited by 91 publications

(167 citation statements)

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“…Yield: 93%; GPC: M n ) 58 700, M w ) 111 000, PDI ) 1.90. 1 In a typical oxidation procedure, polymer PAESf-T-67 (3.0 g) was added into 130 mL of formic acid, and 13 mL of 30% hydrogen peroxide was added dropwise at 40°C. The heterogeneous dispersion was stirred vigorously for 1.5 h before being filtered and washed with methanol.…”

Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

“…Yield: 99%; GPC: M n ) 55 800, M w ) 103 000, PDI ) 1.85. 1 Preparation of Sulfonated Polymer, PAESf-SS-X. The following represents a typical procedure to attach sulfonated phenol to the pendant group of the polymers.…”

Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

“…Yield: 95%. 1 Membrane Casting and Characterization. Polymer PAESf-SS-80 membranes were cast from DMAc solutions (10 wt %) in a custom-built flat glass dish at 50°C under slow nitrogen flow for 2 days.…”

Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

“…1 However, for some special applications, the modification of the polymer structure is frequently required in order to obtain desired properties. One objective of polymer structural modification is to alter chemical structure to some degree or introduce functionality without sacrificing the basic underlying desired physical and other properties.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Bisphenol Monomer with Grafting Capability and the Resulting Poly(arylene ether sulfone)s

Ding

Robertson

et al. 2006

Macromolecules

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A novel bisphenol monomer with grafting capability and the resulting poly(arylene ether sulfone)s Li, Z.; Ding, J.; Robertson, G.P.; Guiver, M.D. ABSTRACT: A new bisphenol monomer, 1,1-bis(4-hydroxyphenyl)-1-(4-(4-fluorophenyl)thio)phenyl-2,2,2-trifluoroethane (3FBPT), containing a masked grafting site was readily synthesized in high yield in two reaction steps. A conventional aromatic nucleophilic substitution (S N Ar) was used for copolymerization of this monomer with difluorodiphenyl sulfone and hexafluorobisphenol A, which gave high molecular weight linear poly(arylene ether sulfone)s containing 4-fluorophenyl sulfide pendant groups. After oxidation to convert the sulfide to sulfone, the para fluorine on the pendant group becomes activated for further S N Ar reaction for the introduction of other functionality onto the pendant side chains such as sulfonated species for fuel cell applications. All the polymers are thoroughly characterized by 1 H, 19 F, and 13 C NMR spectroscopy. Thermal analysis study shows that these polymers have T g s between 180 and 230°C according to the monomer ratio and have excellent thermal stability up to 500°C.

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Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

Section: Synthesis and Oxidation Of Poly(arylene Ether Sulfone)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Novel Bisphenol Monomer with Grafting Capability and the Resulting Poly(arylene ether sulfone)s

Ding

Robertson

et al. 2006

Macromolecules

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“…One approach to increase their solubility in organic solvents is the introduction of bulky groups in the polymer backbone. Introduction of flexible groups in the backbone and copolymerization are also efficient methods in this regard [30,31].…”

Section: Introductionmentioning

confidence: 99%

Liquid crystalline polyureas with oligo(ethylene glycol) sequences

Mehdipour‐Ataei

Akbarian-Feizi

2010

E-Polymers

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A diamine monomer containing ester, amide and ether functional groups was prepared and its polymerization reaction with different diisocyanates to give main chain poly(ester amide ether urea)s was investigated. The monomer was synthesized via reaction of terephthaloyl chloride with 4-hydroxybenzoic acid and subsequent reaction of the resulted diacid with 1,8-diamino-3,6-dioxaoctane. The polymers were characterized by FT-IR and 1 H-NMR spectroscopic method and elemental analysis. The resulting polymers exhibited excellent solubility in polar solvents. Crystallinity of the resulted polymers was evaluated by wide-angle X-ray diffraction (WXRD) method, and they exhibited semi-crystalline patterns. The glass transition temperatures (T g ) of the polymers determined by differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) were in the range of 88-112 °C. The temperatures for 10% weight loss (T 10 ) from their thermogravimetric analysis (TGA) curves were found to be in the range of 297-312 °C in air. Also the prepared polyureas showed liquid crystalline character.

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Copolymers

Ballard

2023

Kirk-Othmer Encyclopedia of Chemical Technology

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This article provides an overview of the preparation, properties, use, and characterization of synthetic copolymers. The range of different copolymer structures that can be synthesized using current methods is detailed and the current IUPAC‐recommended nomenclature for naming these structures is explained. Techniques for the production of copolymers are discussed, with an emphasis on the types of copolymers and copolymer structures attainable through each polymerization technique. Industrially important random, alternating, block, graft, star, and hyperbranched copolymers are described in terms of the processes used to produce them and the properties achieved. Their main uses and major producers are also detailed.

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Introduction to Synthetic Methods in Step‐Growth Polymers

Cited by 91 publications

References 0 publications

A Novel Bisphenol Monomer with Grafting Capability and the Resulting Poly(arylene ether sulfone)s

A Novel Bisphenol Monomer with Grafting Capability and the Resulting Poly(arylene ether sulfone)s

Liquid crystalline polyureas with oligo(ethylene glycol) sequences

Copolymers

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