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Cyclization Routes for Formation of Cyclic Oligomers in Poly(ethylene terephthalate)
Author(s) -
Cho Jun Shik,
Youk Ji Ho,
Jo Won Ho,
Ko Suk Won,
Ha Wan Shik,
Yoo Dong Il
Publication year - 2001
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20010401)202:7<998::aid-macp998>3.0.co;2-n
Subject(s) - chemistry , ethylene , poly ethylene , polymer chemistry , organic chemistry , catalysis
The effect of cyclization routes, alcoholysis, acidolysis and ester‐interchange reaction, on the contents of cyclic poly(ethylene terephthalate) (PET) oligomers and their distribution were investigated by regenerating cyclic oligomers from PET (p‐PET), carboxyl group end‐capped PET (c‐PET) and hydroxyl end group blocked PET (b‐PET). It was found that the possible cyclization routes in p‐PET are alcoholysis, acidolysis and ester‐interchange reaction, whereas the routes in c‐PET and b‐PET are acidolysis and ester‐interchange reaction, respectively. By comparing the contents of cyclic oligomers and their possible cyclization routes in the three PETs from one to another, it is concluded that alcoholysis is the most feasible route, while acidolysis is more effective than ester‐interchange reaction in the cyclic PET formation.