Characterization of poly(styrene-b-vinylbenzylphosphonic acid) copolymer by titration and thermal analysis

Sang Hun Kim, Young Chul Park, Gui Hyun Jung, Chang Gi Cho

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Well defined amphiphilic diblock copolymers of poly(styrene-b- vinylbenzylphosphonic acid) (PS-b-PVBPA) were prepared by controlled radical polymerization technique, two-step hydrolysis reactions using trimethylsilyl bromide from the corresponding phosphonic ethyl ester. By indirect, backward pH titration of the block copolymer, a good titration curve of a dibasic acid was observed. The IEC values obtained from both backward pH titration and volumetric back titration were almost identical. Thermal gravimetric analysis (TGA) of the phosphonic acid containing block copolymer showed a high thermal stability up to 400°C.

Original languageEnglish
Pages (from-to)587-594
Number of pages8
JournalMacromolecular Research
Volume15
Issue number6
DOIs
StatePublished - 2007 Jan 1

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Styrene
Titration
Thermoanalysis
Copolymers
Block copolymers
Acids
Gravimetric analysis
Free radical polymerization
Hydrolysis
Esters
Thermodynamic stability

Keywords

  • Block copolymer
  • Ion exchange capacity
  • Poly(vinylbenzylphosphonic acid)
  • Proton exchange membrane
  • Thermal stability

Cite this

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abstract = "Well defined amphiphilic diblock copolymers of poly(styrene-b- vinylbenzylphosphonic acid) (PS-b-PVBPA) were prepared by controlled radical polymerization technique, two-step hydrolysis reactions using trimethylsilyl bromide from the corresponding phosphonic ethyl ester. By indirect, backward pH titration of the block copolymer, a good titration curve of a dibasic acid was observed. The IEC values obtained from both backward pH titration and volumetric back titration were almost identical. Thermal gravimetric analysis (TGA) of the phosphonic acid containing block copolymer showed a high thermal stability up to 400°C.",
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Characterization of poly(styrene-b-vinylbenzylphosphonic acid) copolymer by titration and thermal analysis. / Kim, Sang Hun; Park, Young Chul; Jung, Gui Hyun; Cho, Chang Gi.

In: Macromolecular Research, Vol. 15, No. 6, 01.01.2007, p. 587-594.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Characterization of poly(styrene-b-vinylbenzylphosphonic acid) copolymer by titration and thermal analysis

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AU - Park, Young Chul

AU - Jung, Gui Hyun

AU - Cho, Chang Gi

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N2 - Well defined amphiphilic diblock copolymers of poly(styrene-b- vinylbenzylphosphonic acid) (PS-b-PVBPA) were prepared by controlled radical polymerization technique, two-step hydrolysis reactions using trimethylsilyl bromide from the corresponding phosphonic ethyl ester. By indirect, backward pH titration of the block copolymer, a good titration curve of a dibasic acid was observed. The IEC values obtained from both backward pH titration and volumetric back titration were almost identical. Thermal gravimetric analysis (TGA) of the phosphonic acid containing block copolymer showed a high thermal stability up to 400°C.

AB - Well defined amphiphilic diblock copolymers of poly(styrene-b- vinylbenzylphosphonic acid) (PS-b-PVBPA) were prepared by controlled radical polymerization technique, two-step hydrolysis reactions using trimethylsilyl bromide from the corresponding phosphonic ethyl ester. By indirect, backward pH titration of the block copolymer, a good titration curve of a dibasic acid was observed. The IEC values obtained from both backward pH titration and volumetric back titration were almost identical. Thermal gravimetric analysis (TGA) of the phosphonic acid containing block copolymer showed a high thermal stability up to 400°C.

KW - Block copolymer

KW - Ion exchange capacity

KW - Poly(vinylbenzylphosphonic acid)

KW - Proton exchange membrane

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