Gas permeation in polyarylates: effect of bisphenol and acid substitution symmetry

Kharul, Ulhas K.; Kulkarni, Sneha A.; Kulkarni, M. G.; Houde, A.Y.; Charati, S. G.; Joshi, S. G.

doi:10.1016/s0032-3861(97)00386-8

Cited by 13 publications

(33 citation statements)

References 12 publications

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“…The polyarylates used in the present study were synthesized by interfacial polycondensation method using Na-salt of bisphenol and respective acid chloride with BTEAC as the phase transfer agent, as detailed earlier [7]. Thus, formed polyarylates were designated based on their monomer abbreviation, as given in Fig.…”

Section: Materials Polymer Synthesis and Characterizationsmentioning

confidence: 99%

“…The DMBisA-BrT was characterized for various physical properties of interest as summarized in Table 1, while in case of other polyarylates, the physical properties were taken from our earlier work [7], as given in Table 1 for comparison. The WAXD spectra was determined using Rigaku X-ray diffractometer (D-max 2500) and d-spacing (d sp ) was calculated from amorphous hollow using Bragg's equation.…”

Section: Materials Polymer Synthesis and Characterizationsmentioning

confidence: 99%

“…The variations in permeability measurement were 5-15% for different gases studied. The permeability of other polyarylates was taken from our earlier report [7] for comparison. …”

Section: Membrane Preparation Gas Sorption and Permeability Determinmentioning

confidence: 99%

“…The gas permeability for BisA-T, DMBisA-T and TMBisA-T was taken from our earlier report [7]. The asymmetrically substituted DMBisA-T exhibited lower permeability than BisA-T while maintaining or increasing ideal selectivity.…”

Section: Gas Permeationmentioning

confidence: 99%

“…[4], where in polyarylate possessed good combination of required physical and gas permeation properties. In subsequent literature, effects of polyarylate structural variations by substitution on either acid [5,6] or bisphenol moiety [6][7][8] were addressed. Though effects of various types of substitutions, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Karadkar¹,

Kharul²,

Bhole³

et al. 2007

Journal of Membrane Science

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Section: Materials Polymer Synthesis and Characterizationsmentioning

confidence: 99%

Section: Materials Polymer Synthesis and Characterizationsmentioning

confidence: 99%

“…The variations in permeability measurement were 5-15% for different gases studied. The permeability of other polyarylates was taken from our earlier report [7] for comparison. …”

Section: Membrane Preparation Gas Sorption and Permeability Determinmentioning

confidence: 99%

Section: Gas Permeationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Karadkar¹,

Kharul²,

Bhole³

et al. 2007

Journal of Membrane Science

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Synthesis and characterization of readily soluble polyarylates derived from either 1,1‐bis(4‐hydroxyphenyl)‐1‐phenylethane or tetramethylbisphenol A and aromatic diacid chlorides

Liu

Shi

et al. 2010

J of Applied Polymer Sci

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A series easily soluble polyarylates were synthesized from either 1,1-bis(4-hydroxyphenyl)-1-phenylethane or tetramethylbisphenol A with various aromatic diacid chlorides by the two-phase interfacial polycondensation. These polyarylates have the inherent viscositiesin the range of 0.36-0.97 dL/g, and their number-average and weight-average molecular weights determined by gel permeation chromatography are 14,200-43,200 and 31,900-102,500, respectively. All these polyarylates are readily soluble in a wide range of organic solvents, thus these polymers can be convenient to process into heat resistance films by cast, spin-or dip-coating. The polyarylates have the glass transition temperatures in the range of 165.0-201.6 C. The pendent phenyl-containing polyarylates reveal excellent thermal stability, and their initial degradation temperatures are all above 480 C and char yields at 700 C are 37.97-40.53% in nitrogen atmosphere. However, the polymers prepared from tetramethylbisphenol A have a large decrease in thermal stability, and their initial degradation temperatures in nitrogen are only about 440 C.

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Copolyesters of Lactide, Isosorbide, and Terephthalic Acid‐Biobased, Biodegradable, High‐T_g Engineering Plastics

Kricheldorf

Weidner

2013

Macro Chemistry & Physics

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Various copolyesters of lactide, isosorbide, and terephthalic acid are prepared by a two-step process performed in a "one-pot" procedure, beginning with an isosorbide-initiated oligomerization of L -lactide followed by polycondensation with terephthaloyl chloride using SnCl 2 as a catalyst for both steps. The SEC data show the formation of random copolyesters with high polydispersities as a consequence of the relatively high fraction of cyclics proved by matrixassisted laser desorption ionization time-of-fl ight mass spectrometry (MALDI-TOF MS). The glass-transition temperatures (89-180 ° C) obey an almost linear trend with the molar composition. The thermostability decreases with increasing lactide content. The successful incorporation of phenyl phosphate results in copolyesters of lower infl ammability.

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Gas permeation in polyarylates: effect of bisphenol and acid substitution symmetry

Cited by 13 publications

References 12 publications

Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Synthesis and characterization of readily soluble polyarylates derived from either 1,1‐bis(4‐hydroxyphenyl)‐1‐phenylethane or tetramethylbisphenol A and aromatic diacid chlorides

Copolyesters of Lactide, Isosorbide, and Terephthalic Acid‐Biobased, Biodegradable, High‐T_g Engineering Plastics

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Gas permeation in polyarylates: effect of bisphenol and acid substitution symmetry

Cited by 13 publications

References 12 publications

Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Gas sorption and transport in polyarylates: Effect of substituent symmetry and polarity

Synthesis and characterization of readily soluble polyarylates derived from either 1,1‐bis(4‐hydroxyphenyl)‐1‐phenylethane or tetramethylbisphenol A and aromatic diacid chlorides

Copolyesters of Lactide, Isosorbide, and Terephthalic Acid‐Biobased, Biodegradable, High‐Tg Engineering Plastics

Contact Info

Product

Resources

About

Copolyesters of Lactide, Isosorbide, and Terephthalic Acid‐Biobased, Biodegradable, High‐T_g Engineering Plastics