Simultaneous glycolysis and hydrolysis of polyethylene terephthalate and characterization of products by differential scanning calorimetry

被引：52

作者：

Güçlü, G ^{[1
]}

Yalçinyuva, T ^{[1
]}

Özgümüs, S ^{[1
]}

Orbay, M ^{[1
]}

机构：

[1] Istanbul Univ, Fac Engn, Dept Chem Engn, TR-34320 Istanbul, Turkey

来源：

POLYMER | 2003年 / 44卷 / 25期

关键词：

polyethylene terephthalate; glycolysis; hydrolysis;

D O I：

10.1016/j.polymer.2003.09.062

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Simultaneous glycolysis and neutral hydrolysis of waste polyethylene terephthalate (PET) has been carried out at 170 and 190 degreesC with constant amount of ethylene glycol (EG) and increasing amounts of water, in the presence of xylene. The organic solvent made it possible to employ very low amounts of reactants as well as application of lower temperatures and pressures in contrast with previous methods, yielding intermediates suitable for PET or other polymeric materials. These intermediates were characterized by acid value (AV), hydroxyl value (HV) determinations as well as by differential scanning calorimetry (DSC). A water soluble crystallizable fraction with high purity, consisting of mono 2-hydroxy ethyl ester of terephthalic acid (monohydroxyethyl terephthalate, MHT) monomer has been obtained with significant yield and its polymerization tendency has been compared with that of bis(2-hydroxy ethyl) terephthalate (BHET) by application of multiple heating/cooling cycles in DSC. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：7609 / 7616

页数：8

共 27 条

[1]

[Anonymous], 1997, US Patent, Patent No. [5,635,584, 5635584]

[2] DEPOLYMERIZATION OF POLY(ETHYLENE-TEREPHTHALATE) RECYCLED FROM POST-CONSUMER SOFT-DRINK BOTTLES [J].

BALIGA, S ;

WONG, WT .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1989, 27 (06) :2071-2082

[3] A KINETIC-STUDY OF THE HYDROLYTIC DEGRADATION OF POLYETHYLENE TEREPHTHALATE AT HIGH-TEMPERATURES [J].

CAMPANELLI, JR ;

KAMAL, MR ;

COOPER, DG .

JOURNAL OF APPLIED POLYMER SCIENCE, 1993, 48 (03) :443-451

[4] CATALYZED-HYDROLYSIS OF POLYETHYLENE TEREPHTHALATE MELTS [J].

CAMPANELLI, JR ;

COOPER, G ;

KAMAL, MR .

JOURNAL OF APPLIED POLYMER SCIENCE, 1994, 53 (08) :985-991

[5] Studies of glycolysis of poly(ethylene terephthalate) recycled from postconsumer soft-drink bottles. I. Influences of glycolysis conditions [J].

Chen, CH ;

Chen, CY ;

Lo, YW ;

Mao, CF ;

Liao, WT .

JOURNAL OF APPLIED POLYMER SCIENCE, 2001, 80 (07) :943-948

[6]

Doerr M.L, 1986, U.S. Patent, Patent No. [4620032A, 4620032]

[7]

Ekart M. P., 2002, U. S. Patent, Patent No. [6,410,607, 6410607]

[8]

Guclu G, 1998, J APPL POLYM SCI, V69, P2311

[9] Hydrolysis of waste polyethylene terephthalate and characterization of products by differential scanning calorimetry [J].

Güçlü, G ;

Yalçinyuva, T ;

Özgümü, S ;

Orbay, M .

THERMOCHIMICA ACTA, 2003, 404 (1-2) :193-205

[10]

HOLMES M, 2001, PLASTICS ADDITIVES C, V3, P18

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