✦ LIBER ✦

Kinetics of diethylene glycol formation from bishydroxyethyl terephthalate with proton catalyst in the preparation of poly(ethylene terephthalate)

✍ Scribed by Leo-Wang Chen; Jong-Wu Chen

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 184 KB
Volume: 75
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(20000307)75:10<1221::aid-app2>3.0.co;2-w

No coin nor oath required. For personal study only.

✦ Synopsis

This research focused on the kinetics of diethylene glycol (DEG) formation from the bishydroxyethyl terephthalate (BHET) monomer with a proton catalyst. In this study, the effect of proton concentration and of reaction temperature on DEG formation are discussed. Also, the rate equation of DEG formation from the BHET monomer with a proton catalyst is described. It was found that, as far as kinetics is concerned, the reactivity of the hydroxyl end groups of BHET with protons is greater than that of ethylene glycol (EG) with protons in DEG formation. In addition, the activation energy of BHET with protons is much lower than that of BHET with itself, that is, as protons emerge during the process of PET synthesis from BHET, they catalyze DEG formation. This study provides additional kinetics data to that described in our studies previously published (

📜 SIMILAR VOLUMES

Kinetics of diethylene glycol formation

Kinetics of diethylene glycol formation from bishydroxyethyl terephthalate with zinc catalyst in the preparation of poly(ethylene terephthalate)

✍ Leo-Wang Chen; Jong-Wu Chen 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 140 KB 👁 1 views

To further discuss the effect of zinc catalyst on diethylene glycol (DEG) formation in the preparation of poly(ethylene terephthalate) (PET), this research focused on the kinetics of DEG formation during PET synthesis from purified bishydroxyethyl terephthalate (BHET) monomer with zinc catalyst. The

The kinetics of diethylene glycol format

The kinetics of diethylene glycol formation in the preparation of polyethylene terephthalate

✍ Jong-Wu Chen; Leo-Wang Chen 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB 👁 1 views

For revealing diethylene glycol (DEG) formation in poly(ethylene terephthalate) (PET) synthesis, this research focused on finding the stage most critical for DEG formation. It is found that the esterification stage was the most critical stage for DEG formation during production of PET through the di

The kinetics of diethylene glycol format

The kinetics of diethylene glycol formation from bis-hydroxyethyl terephthalate with antimony catalyst in the preparation of PET

✍ Jong-Wu Chen; Leo-Wang Chen 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 161 KB 👁 1 views

This research discussed the effect of the addition of antimony catalyst on diethylene glycol (DEG) formation in poly(ethylene terephthalate) (PET) synthesis. It was found that antimony catalyst increased DEG formation in the preparation of PET, in particular, during the esterification stage and also

Kinetic and catalytic aspects of the for

Kinetic and catalytic aspects of the formation of poly(ethylene terephthalate) (PET) investigated with model molecules

✍ B. Apicella; M. Di Serio; L. Fiocca; R. Po; E. Santacesaria 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 196 KB 👁 1 views

Kinetic and catalytic aspects of the formation of poly(ethylene terephthalate) (PET) have been studied in this work using model molecules such as 2-hydroxyethyl 4methylbenzoate (MP), 2-hydroxyethyl 4-benzoate (MB), and 2(-hydroxyethyl 4-methylbenzoate) 4-methylbenzoate (DP), synthesized and purified

Effect of TPA addition at the initial fe

Effect of TPA addition at the initial feed on DEG formation in the preparation of PET and the kinetics of ethylene glycol with protons in the etherification reaction

✍ Jong-Wu Chen; Leo-Wang Chen 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 152 KB 👁 1 views

This research focused on studies of the effect of terephthalic acid (TPA) addition at the initial feed on diethylene glycol formation (DEG) in the process of polyethylene terephthalate (PET) preparation. Experimental results show that, when the mol ratio of ethylene glycol (EG) with TPA ranges from

Preparation of poly(ethylene terephthala

Preparation of poly(ethylene terephthalate)-based proton-exchange membranes through the ultraviolet-induced graft copolymerization of allyl methacrylate for applications in fuel cells

✍ Mohammad B. Khan; Mostak Ahmed; Mubarak A. Khan; Syed S. Alam; M. Anwar H. Khan 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 481 KB 👁 1 views