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Effective aminolytic depolymerization of poly(ethylene terephthalate) waste and synthesis of bisoxazoline therefrom
Author(s) -
Shah Rikhil V.,
Shukla Sanjeev R.
Publication year - 2012
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/app.36649
Subject(s) - depolymerization , materials science , bottle , thionyl chloride , polymer chemistry , polyester , ethylene , yield (engineering) , condensation polymer , nuclear chemistry , organic chemistry , catalysis , polymer , chloride , chemistry , composite material , metallurgy
Aminolytic depolymerization of postconsumer poly(ethylene terephthalate) (PET) bottle waste with 2‐amino‐2‐methyl‐1‐propanol and 1‐amino‐2‐propanol under atmospheric condition was investigated in the presence of catalysts zinc acetate or sodium acetate. The virtual products obtained in pure form were, respectively, bis(1‐hydroxy‐2‐methylpropan‐2‐yl)terephthalamide and bis(2‐hydroxypropyl)terephthalamide. The latter was taken for further studies because of its higher yield and subjected to cyclization using thionyl chloride under low‐temperature conditions to get 1,4‐bis(5‐methyl‐4,5‐dihydrooxazol‐2‐yl)benzene, which is used as chain extender in polyester and nylon compositions and as a crosslinking agent in powder paint compositions. The products obtained from depolymerization were characterized by TLC, melting point, IR spectroscopy, 1 H‐NMR, 13 C‐NMR, and DSC. We have shown that it is possible to synthesize new utility products by recycling of PET waste. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012