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Syntheses of Multicyclic Poly(ether Sulfone)s from 5,5′,6,6′‐Tetrahydroxy‐3,3,3′,3′‐tetramethyl Spirobisindane and 4,4′‐Bis(4‐chlorophenyl) Sulfones by Hans R. Kricheldorf; Kirstin Bornhorst is a Materials Science article available to read on EtoBox.

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## Abstract 5,5′,6,6′‐Tetrahydroxy‐3,3,3′,3′‐tetramethyl spirobisindane (TTSBI) was polycondensed with 4,4′‐dichlorodiphenyl sulfone (DCDPS) or with 4,4′‐bis(4‐chlorophenyl sulfonyl) biphenyl (BCSBP) in DMSO. Concentration and feed ratio were optimized to avoid gelation and to obtain a maximum yield of multicyclic polyethers free of functional groups. Regardless of these reaction conditions, only low fractions of perfect multicycles were obtained from DCDPS apparently due to steric hindrance of ring closure. Under the same conditions high fractions of perfect multicycles were achieved with the longer and more flexible DCSBP. The reaction products were characterized by MALDI‐TOF mass spectrometry, ^1^H‐NMR spectroscopy viscosity, and DSC measurements. Relatively low glass transition temperatures (__T__~g~s ≈ 160–175 °C) were found. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 3732–3739, 2008

Who reads Syntheses of Multicyclic Poly(ether Sulfone)s from 5,5′,6,6′‐Tetrahydroxy‐3,3,3′,3′‐tetramethyl Spirobisindane and 4,4′‐Bis(4‐chlorophenyl) Sulfones?

Author

Hans R. Kricheldorf; Kirstin Bornhorst

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2008

Language

EN

Field

Materials Science (Physical Sciences)