Synthesis and characterization of amine terminated poly(arylene ether sulphone) oligomers

Jurek, M. J.; McGrath, James E.

doi:10.1016/0032-3861(89)90232-2

Cited by 49 publications

(23 citation statements)

References 7 publications

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“…The degree of polymerisation (DP) for the stepgrowth polymerisation of decafluorobiphenyl and bisphenol AF can be adjusted by the stoichiometric imbalance r of the two monomers according to Carother's Eq. (1) [34][35][36].…”

Section: Determination Of Ion-exchange Capacity (Iec) Of Polymers Andmentioning

confidence: 99%

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

et al. 2008

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A partially fluorinated polyether ionomer from polycondensation of decafluorobiphenyl with 2,2‐bis(4‐hydroxyphenyl)hexafluoropropane, followed by sulphonation with H2SO4 (60% SO3), has been prepared and optimised in terms of molecular weight and sulphonation degree. The partially fluorinated ionomer has been blended with poly(2,2′‐m‐phenylene‐5,5′‐bibenzimidazole) (PBI), yielding base–acid blends with PBI in excess. The base–acid blend membranes have been characterised in terms of solubility in DMAc, water uptake and oxidative stability by immersion in aqueous 5 wt.‐% H2O2 solutions and Fenton's Reagent, respectively.

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Section: Determination Of Ion-exchange Capacity (Iec) Of Polymers Andmentioning

confidence: 99%

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

et al. 2008

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“…(1). 37,38 The hydroxyl functional group was maintained by taking calculated excess of the dihydroxy monomer, MeHQ. The procedure for the synthesis of hydroxyl terminated PEEKMOH oligomer with number average molecular weight ( M n ) 12,000 is as follows.…”

Section: Synthesis Of Peekmoh Oligomermentioning

confidence: 99%

Hydroxyl terminated poly(ether ether ketone) with pendant methyl group‐toughened epoxy clay ternary nanocomposites: Preparation, morphology, and thermomechanical properties

Asif

Leena

Rao

et al. 2007

J of Applied Polymer Sci

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Hydroxyl terminated poly(ether ether ketone) oligomer with pendant methyl group (PEEKMOH) was prepared. Ternary nanocomposites were processed by blending PEEKMOH oligomer with diglycidyl ether of bisphenol-A (DGEBA) epoxy resin along with organically modified montmorillonite (Cloisite 25A) followed by curing with 4,4'-diamino diphenyl sulfone. Tensile moduli and flexural moduli were increased, while the tensile strength and Izod impact strength were decreased with increase in clay content. Similarly, storage moduli and loss moduli were increased and glass transition temperature was decreased as the percentage of clay increased. X-ray diffractograms showed exfoliated morphology even with higher concentration of clay content (8 phr). Scanning electron microscopy of fractured surfaces and tensile failed specimens revealed slow crack propagation and increase in river markings with nanoclay incorporation confirming the improvement in toughness. The domain size of PEEKMOH was decreased with the incorporation of nanoclay into the epoxy matrix, indicating the restriction of growth mechanism by nucleation during phase separation. With increase in clay content, phase separation disappeared indicating gelation occurs before phase separation. Fracture toughness was increased with the addition of PEEKMOH and clay in epoxy resin. Coefficient of thermal expansion of nanocomposites decreases up to 3 phr clay concentrations thereafter it increases. A marginal increase in thermal stability was observed with increase in clay content.

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“…Hydroxyl terminated PEEK oligomer having pendant methyl groups with number average molecular weight (M n ) ¼ 12,000 g/mol (theoretical) was synthesized by aromatic nucleophilic displacement of fluorine from an activated substrate, DFBP by methyl hydroquinone (MeHQ) as reported earlier [38].The molecular weight was controlled by taking specified amount of monomers calculated using Carother's equation [39,40]. The hydroxyl functional group was maintained by taking calculated excess of the dihydroxy monomer, MeHQ.…”

Section: Synthesis Of Peekmoh Oligomermentioning

confidence: 99%

Thermoplastic toughened layered silicate epoxy ternary nanocomposites—Preparation, morphology, and thermomechanical properties

Asif

Rao

Saseendran

et al. 2009

Polymer Engineering & Sci

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Epoxy-clay ternary nanocomposites were processed by melt blending of hydroxyl terminated poly (ether ether ketone) oligomer with pendant methyl groups (PEEKMOH) with diglycidyl ether of bisphenol A (DGEBA) epoxy resin along with organically modified montmorillonite (OMC-OH) followed by curing with 4,4 0 -diamino diphenyl sulfone. Small angle X-ray diffraction and transmission electron microscopy revealed an intercalated morphology. Tensile, flexural, storage, and loss moduli were increased whereas the tensile, flexural, and impact strength and glass transition temperature were decreased with increase in clay content for the PEEKMOH toughened epoxy system. Fracture toughness and percentage strain were increased by 66% and 45% respectively whereas the coefficient of the thermal expansion was decreased by 27% with the incorporation of 1 phr OMC-OH to the PEEKMOH toughened epoxy system compared with neat epoxy. The scanning electron microscope pictures of fracture and tensile failed surfaces revealed crack path deflection and ductile fracture with the incorporation of OMC-OH confirming the improvement in toughness. The domain size and the distance between the domains of thermoplastic phase were decreased with the addition of nanoclay into the epoxy matrix indicating the restriction of the growth mechanism by nucleation during phase separation.

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Synthesis and characterization of amine terminated poly(arylene ether sulphone) oligomers

Cited by 49 publications

References 7 publications

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

Hydroxyl terminated poly(ether ether ketone) with pendant methyl group‐toughened epoxy clay ternary nanocomposites: Preparation, morphology, and thermomechanical properties

Thermoplastic toughened layered silicate epoxy ternary nanocomposites—Preparation, morphology, and thermomechanical properties

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Synthesis and characterization of amine terminated poly(arylene ether sulphone) oligomers

Cited by 49 publications

References 7 publications

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H3PO4. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H3PO4. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

Hydroxyl terminated poly(ether ether ketone) with pendant methyl group‐toughened epoxy clay ternary nanocomposites: Preparation, morphology, and thermomechanical properties

Thermoplastic toughened layered silicate epoxy ternary nanocomposites—Preparation, morphology, and thermomechanical properties

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Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes

Partially Fluorinated Arylene Polyethers and Their Ternary Blend Membranes with PBI and H₃PO₄. Part I. Synthesis and Characterisation of Polymers and Binary Blend Membranes