Chemical modification of poly(vinyl chloride) using sodium trisulfide

Tomohito Kameda; Makoto Yoshihara; Guido Grause; Toshiaki Yoshioka

doi:10.1007/s10965-015-0718-2

Chemical modification of poly(vinyl chloride) using sodium trisulfide

Tomohito Kameda, Makoto Yoshihara, Guido Grause, Toshiaki Yoshioka

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

Chemically modifying after-life PVC may be a useful way of reducing plastic waste. In this work, we modified PVC using a solution of Na₂S₃ in ethylene glycol, diethylene glycol, and triethylene glycol at temperatures of 150–190 °C. Substitution ratios as high as 89 % were observed, especially at high temperatures. Against our expectations, only monosulfide bridges were present in the modified PVC; polysulfides were absent. This can be explained by the fission of S₃²⁻ into highly reactive anion radicals. Using a lower-polarity solvent (triethylene glycol) accelerated the dechlorination but also enhanced elimination.

Original language	English
Article number	88
Journal	Journal of Polymer Research
Volume	22
Issue number	5
DOIs	https://doi.org/10.1007/s10965-015-0718-2
Publication status	Published - 2015 May 1

Keywords

Crosslinking
Elimination
Solvent polarity
Substitution
Sulfur radical anion

ASJC Scopus subject areas

Polymers and Plastics
Organic Chemistry
Materials Chemistry

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AU - Kameda, Tomohito

AU - Yoshihara, Makoto

AU - Grause, Guido

AU - Yoshioka, Toshiaki

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Y1 - 2015/5/1

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AB - Chemically modifying after-life PVC may be a useful way of reducing plastic waste. In this work, we modified PVC using a solution of Na2S3 in ethylene glycol, diethylene glycol, and triethylene glycol at temperatures of 150–190 °C. Substitution ratios as high as 89 % were observed, especially at high temperatures. Against our expectations, only monosulfide bridges were present in the modified PVC; polysulfides were absent. This can be explained by the fission of S32− into highly reactive anion radicals. Using a lower-polarity solvent (triethylene glycol) accelerated the dechlorination but also enhanced elimination.

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KW - Elimination

KW - Solvent polarity

KW - Substitution

KW - Sulfur radical anion

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Chemical modification of poly(vinyl chloride) using sodium trisulfide

Abstract

Keywords

ASJC Scopus subject areas

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