Editorial

Bandeira, Lourdes; Costa, Arthur Trindade

doi:10.1590/s0102-69922005000300001

Soc. estado.

2005

DOI: 10.1590/s0102-69922005000300001

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Editorial

Lourdes Bandeira¹,

Arthur Trindade Costa²

Abstract: Este número encerra o volume 20 da revista Sociedade e Estado. Neste ano, importantes mudanças foram introduzidas nos nossos procedimentos editoriais. A revista passou a ter três fascículos por ano e deixou de publicar números temáticos. A prioridade passa a ser dada aos Dossiês Temáticos, o que possibilita receber a qualquer momento artigos sobre diversos temas de interesse da Sociologia.Estas mudanças resultam de uma nova política sugerida pelo nosso Comitê Editorial no sentido de ampliar o escopo e a abrang… Show more

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New poly(arylene ether)s containing phthalimidine group in the main chain

Aggarwal

Maji

Sen

et al. 2009

J of Applied Polymer Sci

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Five new poly(arylene ether)s containing phthalimidine group in the main chain and pendent trifluoromethyl group have been prepared by the reaction of 4,4 0 -(bis-4-fluoro-3-trifluoromethylphenyl)benzene (BTF) with bisphenols. Different molar ratios of N-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine (PA) and 4,4 0 -isopropylidenediphenol (BPA) have been used to generate different copolymers. The polymers obtained by step growth polymerization exhibited weight-average molecular weight upto 134,000 g/mol with a polydispersity index of 2.1-2.4. The homopolymer from BTF and PA showed very high glass transition temperature of 258 C and outstanding thermal stability upto 536 C for 5% weight loss under nitrogen. The polymers were soluble in a wide range of organic solvents. Transparent thin films of these polymers exhibited tensile strengths upto 65 MPa and elongation at break upto 45% depending on the exact repeat unit structures.

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New poly(arylene ether)s containing phthalimidine group in the main chain

Aggarwal

Maji

Sen

et al. 2009

J of Applied Polymer Sci

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Synthesis, characterization, and comparison of properties of new fluorinated poly(arylene ether)s containing phthalimidine moiety in the main chain

Mohanty

Sen

Ghosh

et al. 2009

Polymers for Advanced Techs

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Four new poly(arylene ether)s have been prepared by the reaction of N‐phenyl‐3,3‐bis(4‐hydroxyphenyl)phthalimidine (PA) with four different perfluoroalkylated monomers namely 1,3‐bis(4′‐fluoro‐3′‐trifluoromethyl benzyl) benzene, 4,4′‐bis(4′‐fluoro‐3′‐trifluoromethyl benzyl) biphenyl, 2,6‐bis(4′‐fluoro‐3′‐trifluoromethyl benzyl) pyridine, and 2,5‐bis(4′‐fluoro‐3′‐trifluoromethyl benzyl) thiophene. The poly(arylene ether)s were characterized by different spectroscopic, thermal, mechanical, and electrical techniques. The poly(arylene ether) containing quadriphenyl unit in the main chain showed very high glass transition temperature of 291°C and outstanding thermal stability upto 556°C for 10% weight loss under a 4:1 nitrogen:oxygen mixture. The polymers were soluble in a wide range of organic solvents. Transparent thin films of these polymers exhibited tensile strengths upto 75 MPa and elongation at break upto 32%. The films of these polymers showed low water absorption of 0.26%. Copyright © 2009 John Wiley & Sons, Ltd.

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Co‐poly(aryl ether sulfone)s containing phthalimidine moiety in the main chain

Ghosh¹,

Maji²,

Banerjee³

et al. 2011

Polymers for Advanced Techs

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Several new co‐poly(arylene ether sulfone)s have been prepared by the reaction of 4,4′‐fluorodiphenyl sulfone (FDS) with different bisphenols namely 4,4′‐isopropylidenediphenol (BPA), 4,4′‐hexafluoroisopropylidenediphenol (6F‐BPA), and N‐phenyl‐3,3‐bis(4‐hydroxyphenyl)phthalimidine(PA). The homo‐poly(arylene ether sulfone)s are named as 1a, 2a, and 3a. The copolymers namely 2b, 2c, 2d and 3b, 3c, 3d have been prepared, respectively, on reaction of FDS with BPA or 6F‐BPA using different molar ratios of PA such as 25, 50, and 75. The poly(aryl ether sulfone)s 1a containing PA unit in the main chain showed a very high glass transition temperature of 280°C and an outstanding thermal stability up to 510°C for 5% weight loss under synthetic air. Depending on the mole% of PA, the glass transition temperatures of the copolymers can be varied. The polymers were soluble in a wide range of organic solvents. Transparent thin films of these polymers exhibited tensile strengths upto 84 MPa and Young's modulus up to 3.16 GPa. The films of these polymers showed low water absorption of 0.24%. Copyright © 2009 John Wiley & Sons, Ltd.

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Editorial

Cited by 3 publications

References 0 publications

New poly(arylene ether)s containing phthalimidine group in the main chain

New poly(arylene ether)s containing phthalimidine group in the main chain

Synthesis, characterization, and comparison of properties of new fluorinated poly(arylene ether)s containing phthalimidine moiety in the main chain

Co‐poly(aryl ether sulfone)s containing phthalimidine moiety in the main chain

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