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Selective pyrolysis of polystyrene to that with a desired low polymeric degree
Author(s) -
Murakata Tadahiro,
Saito Manabu,
Sato Hiroyasu,
Hirai Tohru,
Sato Shimio
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981212)70:11<2299::aid-app24>3.0.co;2-w
Subject(s) - polystyrene , degree (music) , pyrolysis , materials science , polymer science , chemical engineering , polymer chemistry , composite material , polymer , physics , engineering , acoustics
To obtain low polymeric polystyrene (PS), pyrolysis of high polymeric PS in solution was studied in the temperature range from 290 to 400°C by using additives or acid catalysts. The low polymeric PS targeted here was that with average molecular weight of 10 4 . When the feed PS was pyrolyzed in tetralin by adding sulfur or diphenyl disulfide, the molecular weight of PS decreased greatly, even at lower temperatures, and the desired low polymeric PS was formed in a relatively large amount at the temperatures below 350°C. The degradation behavior was able to be explained in terms of a random polymer chain scission mechanism initiated by sulfur radicals formed from the additives. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 70: 2299–2305, 1998