Synthesis and properties of poly(aryl ether ether ketone) copolymers with pendant methyl groups

Rao, V. Lakshmana; Sabeena, P. U.; Saxena, Amit; Gopalakrishnan, C.; Krishnan, K.; Ravindran, P.; Ninan, K. N.

doi:10.1016/j.eurpolymj.2004.07.002

Cited by 58 publications

(27 citation statements)

References 9 publications

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“…The incorporation of a variety of rigid and bulky groups such as diphenyl or naphthalene in the PAEK backbone is one of the common approaches for increasing T g because it offers good advantages concerning the stability and thermal resistance of the resulting polymer . The copolymerization of PEEK was also investigated in order to improve its glass transition temperature ( T g ), and processability at high temperatures, and to obtain relatively low‐cost materials , however, the enhancing of T g is not so remarkable for those reported PEEK copolymers. Shibata et al reported the synthesis of the block copolymers of the poly(ether ether ketone) (PEEK) and the poly(aryl ether sulfone) containing biphenylene moieties (PEBS) .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of poly(aryl ether ketone)s containing both biphenylene moieties and sulfone linkages in the main chain

et al. 2015

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Two monomers, 4,4 0 -bis(4-phenoxybenzoyl)biphenyl (BPOBBP) and 4,4 0 -diphenoxydiphenyl sulfone (DPODPS), were conveniently synthesized via simple synthetic procedures from readily available materials. A series of novel poly(aryl ether ketone)s containing both biphenylene moieties and sulfone linkages in the main chain were synthesized by the modified electrophilic Friedel-Crafts acylation copolycondensation of isophthaloyl chloride (IPC) with a mixture of BPOBBP and DPODPS, over a wide range of BPOBBP/DPODPS molar ratios. The resulting polymers were characterized by Fourier transform infrared spectroscopy (FT-IR), wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA), etc. The results indicated that the copolymers with 30 to 35 mol% DPODPS were semicrystalline and had remarkably increased glass transition temperatures (T g s) over the conventional poly(ether ether ketone) (PEEK) and poly(ether ketone ketone) (PEKK) due to the incorporation of biphenylene units and sulfone linkages in the main chain. The copolymers with 30 to 35 mol% DPODPS had not only high T g s of 176 to 177 C, but also moderate melting temperatures (T m s) of 334 to 337 C, having good potential for the melt processing. The semicrystalline copolymers II to V had tensile strengths of 99.8 to 103.1 MPa, Young's moduli of 2.26 to 2.79 GPa, and elongations at break of 16.8 to 26.5% and exhibited outstanding thermal stability and good resistance to organic solvents. POLYM. ENG. SCI., 55:2140-2147, 2015

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Section: Introductionmentioning

confidence: 99%

Synthesis and properties of poly(aryl ether ketone)s containing both biphenylene moieties and sulfone linkages in the main chain

et al. 2015

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“…In order to study the effect of different existing functional groups in the resulting PAs on their thermal stability, the thermal kinetic investigation was carried out using the Coats-Redfern (2) and Dharwadkar-Kharkhanawala (3) equations. [46][47][48][49][50][51][52] The results are listed in Table VI. The calculating of thermodynamic data applied on the decomposition peak in PA13, PA20, PA22 and PA23.…”

Section: Kinetic Studymentioning

confidence: 86%

“…This reveals that the more thermal stability and more ordered systems for this PA. One way to explain this behavior would be from the initial homolytic cleavage of ph-CH 3 bond which produces radical intermediate and therefore, provides a more stable cross-linked structure (Scheme 3). 52 The other way to explain this performance would be due to electron releasing (+I effect) property of methyl group which activates the amide linkages and makes them highly activated for hydrogen bonding formation.…”

Section: Kinetic Studymentioning

confidence: 99%

Molten Tetrabutylammonium Bromide as Eco-Friendly Media for the Synthesis of Optically Active and Thermal Stable Polyamides under Microwave Irradiation

Mallakpour

Taghavi

2008

Polym J

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“…The incorporation of a variety of rigid and bulky groups, such as diphenyl or naphthalene in the PAEK backbone, is one of the common approaches for increasing T g because it offers good advantages concerning the stability and thermal resistance of the resulting polymer . The copolymerization of PEEK was also investigated to improve its glass transition temperature ( T g ), processability at high temperatures, and to obtain low‐cost materials ; however, the improvement of T g is not so marked for those reported PEEK copolymers. It should be noted that the investigations into the modification of PAEK properties have mainly focused on PEEK by nucleophilic route and, to a lesser extent, on other commercially available PAEKs .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone)

Qian

Zhou

et al. 2013

Polymer Engineering & Sci

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A new monomer, N,N′‐bis(4‐phenoxybenzoyl)‐m‐phenylenediamine (BPMPDA), was prepared via the reaction of m‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N‐dimethylacetamide. Novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone) (PEAAEKK) were synthesized by the modified electrophilic Friedel–Crafts acylation copolycondensation of terephthaloyl chloride with a mixture of 4,4′‐diphenoxybenzophenone (DPOBPN) and BPMPDA, over a wide range of DPOBPN/BPMPDA molar ratios. The resulting copolymers were characterized by Fourier transform infrared spectroscopy, wide‐angle X‐ray diffraction, differential scanning calorimetry, and thermogravimetric analysis, and so on. The results indicated that the copolymers with 10–30 mol% BPMPDA were semicrystalline and had remarkably increased glass transition temperatures (Tgs) over the conventional poly(ether ether ketone) and poly(ether ketone ketone) due to the incorporation of amide linkages in the main chains. The copolymers III and IV with 20–30 mol% BPMPDA had not only high Tgs of 177–180°C, but also moderate melting temperatures (Tms) of 324–333°C, having good potential for the melt processing. The copolymers III and IV had tensile strengths of 101.8–104.4 MPa, Young's moduli of 2.32–2.46 GPa, and elongations at break of 10.8–12.2% and exhibited high thermal stability and excellent resistance to organic solvents. POLYM. ENG. SCI., 53:2353–2359, 2013. © 2013 Society of Plastics Engineers

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Synthesis and properties of poly(aryl ether ether ketone) copolymers with pendant methyl groups

Cited by 58 publications

References 9 publications

Synthesis and properties of poly(aryl ether ketone)s containing both biphenylene moieties and sulfone linkages in the main chain

Synthesis and properties of poly(aryl ether ketone)s containing both biphenylene moieties and sulfone linkages in the main chain

Molten Tetrabutylammonium Bromide as Eco-Friendly Media for the Synthesis of Optically Active and Thermal Stable Polyamides under Microwave Irradiation

Synthesis and properties of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether amide amide ether ketone ketone)

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