Preparation of PBT/clay nanocomposites using supercritical process

Youngki Hong, Ho Gyu Yoon, Soonho Lim

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Butylene terephthalate cyclic (BTC) oligomers have been successfully polymerized to a poly(buthylene terephthalate) (PBT) employing the advantages of the low viscosity of cyclic oligomers and high solubility, high transport property of supercritical fluids. The ring-opening polymerization of BTC oligomers initiated by various mol concentration of catalyst (cyclic stannoxane 1) is carried out in supercritical chlorodifluoromethane (HCFC-22) at temperature ranging from 160 to 220 °C, at pressure ranging from 150 to 410 bar and at time ranging from 2 to 10 hrs. The highest molecular weight was obtained at 190 °C, 410 bar and 4 mol% mol concentration of catalyst. The results of XRD and TEM show that some of clays are intercalated or disordered, consisting of about 2-10 parallel silicate layers to form morphology like thin thread and some of clays are collapsed. The modulus and tensile strength of the nanocomposites prepared by supercritical process were higher than those of nanocomposites prepared by melt process.

Original languageEnglish
Pages (from-to)115-118
Number of pages4
JournalInternational Journal of Precision Engineering and Manufacturing
Volume10
Issue number3
DOIs
Publication statusPublished - 2009 Jul 1

Fingerprint

Oligomers
Nanocomposites
Clay
Catalysts
Supercritical fluids
Ring opening polymerization
Transport properties
Silicates
Tensile strength
Solubility
Molecular weight
Viscosity
Transmission electron microscopy
Temperature

Keywords

  • Chlorodifluoromethane
  • Clay
  • Nanocomposites
  • Oligomers
  • Poly(buthylene terephthalate)
  • Ring opening polymerization
  • Supercritical fluid

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Industrial and Manufacturing Engineering
  • Mechanical Engineering

Cite this

Preparation of PBT/clay nanocomposites using supercritical process. / Hong, Youngki; Yoon, Ho Gyu; Lim, Soonho.

In: International Journal of Precision Engineering and Manufacturing, Vol. 10, No. 3, 01.07.2009, p. 115-118.

Research output: Contribution to journalArticle

@article{65a16a5263d845bdb68b9806b50ce30e,
title = "Preparation of PBT/clay nanocomposites using supercritical process",
abstract = "Butylene terephthalate cyclic (BTC) oligomers have been successfully polymerized to a poly(buthylene terephthalate) (PBT) employing the advantages of the low viscosity of cyclic oligomers and high solubility, high transport property of supercritical fluids. The ring-opening polymerization of BTC oligomers initiated by various mol concentration of catalyst (cyclic stannoxane 1) is carried out in supercritical chlorodifluoromethane (HCFC-22) at temperature ranging from 160 to 220 °C, at pressure ranging from 150 to 410 bar and at time ranging from 2 to 10 hrs. The highest molecular weight was obtained at 190 °C, 410 bar and 4 mol{\%} mol concentration of catalyst. The results of XRD and TEM show that some of clays are intercalated or disordered, consisting of about 2-10 parallel silicate layers to form morphology like thin thread and some of clays are collapsed. The modulus and tensile strength of the nanocomposites prepared by supercritical process were higher than those of nanocomposites prepared by melt process.",
keywords = "Chlorodifluoromethane, Clay, Nanocomposites, Oligomers, Poly(buthylene terephthalate), Ring opening polymerization, Supercritical fluid",
author = "Youngki Hong and Yoon, {Ho Gyu} and Soonho Lim",
year = "2009",
month = "7",
day = "1",
doi = "10.1007/s12541-009-0055-7",
language = "English",
volume = "10",
pages = "115--118",
journal = "International Journal of Precision Engineering and Manufacturing",
issn = "1229-8557",
publisher = "Korean Society of Precision Engineering",
number = "3",

}

TY - JOUR

T1 - Preparation of PBT/clay nanocomposites using supercritical process

AU - Hong, Youngki

AU - Yoon, Ho Gyu

AU - Lim, Soonho

PY - 2009/7/1

Y1 - 2009/7/1

N2 - Butylene terephthalate cyclic (BTC) oligomers have been successfully polymerized to a poly(buthylene terephthalate) (PBT) employing the advantages of the low viscosity of cyclic oligomers and high solubility, high transport property of supercritical fluids. The ring-opening polymerization of BTC oligomers initiated by various mol concentration of catalyst (cyclic stannoxane 1) is carried out in supercritical chlorodifluoromethane (HCFC-22) at temperature ranging from 160 to 220 °C, at pressure ranging from 150 to 410 bar and at time ranging from 2 to 10 hrs. The highest molecular weight was obtained at 190 °C, 410 bar and 4 mol% mol concentration of catalyst. The results of XRD and TEM show that some of clays are intercalated or disordered, consisting of about 2-10 parallel silicate layers to form morphology like thin thread and some of clays are collapsed. The modulus and tensile strength of the nanocomposites prepared by supercritical process were higher than those of nanocomposites prepared by melt process.

AB - Butylene terephthalate cyclic (BTC) oligomers have been successfully polymerized to a poly(buthylene terephthalate) (PBT) employing the advantages of the low viscosity of cyclic oligomers and high solubility, high transport property of supercritical fluids. The ring-opening polymerization of BTC oligomers initiated by various mol concentration of catalyst (cyclic stannoxane 1) is carried out in supercritical chlorodifluoromethane (HCFC-22) at temperature ranging from 160 to 220 °C, at pressure ranging from 150 to 410 bar and at time ranging from 2 to 10 hrs. The highest molecular weight was obtained at 190 °C, 410 bar and 4 mol% mol concentration of catalyst. The results of XRD and TEM show that some of clays are intercalated or disordered, consisting of about 2-10 parallel silicate layers to form morphology like thin thread and some of clays are collapsed. The modulus and tensile strength of the nanocomposites prepared by supercritical process were higher than those of nanocomposites prepared by melt process.

KW - Chlorodifluoromethane

KW - Clay

KW - Nanocomposites

KW - Oligomers

KW - Poly(buthylene terephthalate)

KW - Ring opening polymerization

KW - Supercritical fluid

UR - http://www.scopus.com/inward/record.url?scp=76849087130&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=76849087130&partnerID=8YFLogxK

U2 - 10.1007/s12541-009-0055-7

DO - 10.1007/s12541-009-0055-7

M3 - Article

AN - SCOPUS:76849087130

VL - 10

SP - 115

EP - 118

JO - International Journal of Precision Engineering and Manufacturing

JF - International Journal of Precision Engineering and Manufacturing

SN - 1229-8557

IS - 3

ER -