Summary
The heat of base-catalyzed alcoholysis of poly(ethylene terephthalate) (PET) and poly(ethylene 2,6-naphthalenedicarboxylate) (PEN) as well as several related aromatic and aliphatic esters has been measured using a high-pressure calorimeter. The process is essentially thermoneutral, and heats of CH3ONa-catalyzed methanolysis of PET and PEN are +1.8±0.6 and +9.3±0.2 kJ/mol-carboxyl group, respectively. Furthermore, the heats of Zn(OCOCH3)2-catalyzed alcoholysis of PET with ethylene glycol and benzyl alcohol are also calculated as +5.8±0.2 and +6.6±0.8 kJ/mol-carboxyl group, respectively. These values are comparable to those for ethyl esters of p-substituted benzoic acids and propionic acid.
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Received: 15 December 1998/Revised version: 22 January 1999/Accepted: 29 January 1999
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Kishimoto, Y., Kajihara, T. & Kato, S. Study on the alcoholysis of aromatic polyesters and related esters using a high-pressure calorimeter. Polymer Bulletin 42, 295–300 (1999). https://doi.org/10.1007/s002890050466
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DOI: https://doi.org/10.1007/s002890050466