A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol

Hong shik Lee; Ju Hyeong Jeong; Hang Kyu Cho; Chong Min Koo; Soon Man Hong; Hwayong Kim; Youn Woo Lee

doi:10.1016/j.polymdegradstab.2008.09.006

A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol

Hong shik Lee
, Ju Hyeong Jeong
, Hang Kyu Cho
, Chong Min Koo
, Soon Man Hong
, Hwayong Kim
, Youn Woo Lee^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

43 Citations (Scopus)

Abstract

The recycling of cross-linked polyethylene (XLPE) by a decross-linking reaction in supercritical methanol was studied using a batch reactor. XLPEs with initial gel contents of 45, 55 and 65% were employed and subjected to reaction temperatures between 320 and 360 °C. Complete decross-linking of XLPE was achieved in 10 min in supercritical methanol at 360 °C and 15 MPa. For the first time, chemical kinetics for the decross-linking reaction is proposed based on the gel concentration, and applicable to the reactor design. With respect to the gel concentration, the first-order reaction model agreed well with the experimental results. The evaluated kinetic constant was 0.0867 ± 0.0082 cm³/mg min at 350 °C, and the activation energy was 578 ± 25 kJ/mol.

Original language	English
Pages (from-to)	2084-2088
Number of pages	5
Journal	Polymer Degradation and Stability
Volume	93
Issue number	12
DOIs	https://doi.org/10.1016/j.polymdegradstab.2008.09.006
Publication status	Published - 2008 Dec
Externally published	Yes

Bibliographical note

Funding Information:
This work was performed with the financial assistance from the Resources Recycling R&D Center, which is a 21C Frontier Project of the Korean Ministry of Education, Science and Technology.

Keywords

Cross-linked polyethylene
Decross-linking
Kinetics
Recycling
Supercritical methanol

ASJC Scopus subject areas

Condensed Matter Physics
Mechanics of Materials
Polymers and Plastics
Materials Chemistry

Access to Document

10.1016/j.polymdegradstab.2008.09.006

Cite this

@article{e42151c184fa40bda47803a1732d10f4,

title = "A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol",

abstract = "The recycling of cross-linked polyethylene (XLPE) by a decross-linking reaction in supercritical methanol was studied using a batch reactor. XLPEs with initial gel contents of 45, 55 and 65\% were employed and subjected to reaction temperatures between 320 and 360 °C. Complete decross-linking of XLPE was achieved in 10 min in supercritical methanol at 360 °C and 15 MPa. For the first time, chemical kinetics for the decross-linking reaction is proposed based on the gel concentration, and applicable to the reactor design. With respect to the gel concentration, the first-order reaction model agreed well with the experimental results. The evaluated kinetic constant was 0.0867 ± 0.0082 cm3/mg min at 350 °C, and the activation energy was 578 ± 25 kJ/mol.",

keywords = "Cross-linked polyethylene, Decross-linking, Kinetics, Recycling, Supercritical methanol",

author = "Lee, \{Hong shik\} and Jeong, \{Ju Hyeong\} and Cho, \{Hang Kyu\} and Koo, \{Chong Min\} and Hong, \{Soon Man\} and Hwayong Kim and Lee, \{Youn Woo\}",

note = "Funding Information: This work was performed with the financial assistance from the Resources Recycling R\&D Center, which is a 21C Frontier Project of the Korean Ministry of Education, Science and Technology.",

year = "2008",

month = dec,

doi = "10.1016/j.polymdegradstab.2008.09.006",

language = "English",

volume = "93",

pages = "2084--2088",

journal = "Polymer Degradation and Stability",

issn = "0141-3910",

publisher = "Elsevier Ltd",

number = "12",

}

TY - JOUR

T1 - A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol

AU - Lee, Hong shik

AU - Jeong, Ju Hyeong

AU - Cho, Hang Kyu

AU - Koo, Chong Min

AU - Hong, Soon Man

AU - Kim, Hwayong

AU - Lee, Youn Woo

N1 - Funding Information: This work was performed with the financial assistance from the Resources Recycling R&D Center, which is a 21C Frontier Project of the Korean Ministry of Education, Science and Technology.

PY - 2008/12

Y1 - 2008/12

N2 - The recycling of cross-linked polyethylene (XLPE) by a decross-linking reaction in supercritical methanol was studied using a batch reactor. XLPEs with initial gel contents of 45, 55 and 65% were employed and subjected to reaction temperatures between 320 and 360 °C. Complete decross-linking of XLPE was achieved in 10 min in supercritical methanol at 360 °C and 15 MPa. For the first time, chemical kinetics for the decross-linking reaction is proposed based on the gel concentration, and applicable to the reactor design. With respect to the gel concentration, the first-order reaction model agreed well with the experimental results. The evaluated kinetic constant was 0.0867 ± 0.0082 cm3/mg min at 350 °C, and the activation energy was 578 ± 25 kJ/mol.

AB - The recycling of cross-linked polyethylene (XLPE) by a decross-linking reaction in supercritical methanol was studied using a batch reactor. XLPEs with initial gel contents of 45, 55 and 65% were employed and subjected to reaction temperatures between 320 and 360 °C. Complete decross-linking of XLPE was achieved in 10 min in supercritical methanol at 360 °C and 15 MPa. For the first time, chemical kinetics for the decross-linking reaction is proposed based on the gel concentration, and applicable to the reactor design. With respect to the gel concentration, the first-order reaction model agreed well with the experimental results. The evaluated kinetic constant was 0.0867 ± 0.0082 cm3/mg min at 350 °C, and the activation energy was 578 ± 25 kJ/mol.

KW - Cross-linked polyethylene

KW - Decross-linking

KW - Kinetics

KW - Recycling

KW - Supercritical methanol

UR - https://www.scopus.com/pages/publications/56249115181

U2 - 10.1016/j.polymdegradstab.2008.09.006

DO - 10.1016/j.polymdegradstab.2008.09.006

M3 - Article

AN - SCOPUS:56249115181

SN - 0141-3910

VL - 93

SP - 2084

EP - 2088

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

IS - 12

ER -

A kinetic study of the decross-linking of cross-linked polyethylene in supercritical methanol

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this