Abstract
Ethylene terephthalate cyclic oligomers (ETCs) have been successfully polymerized to a high molecular weight poly(ethylene terephthalate) (PET) employing the advantages of the low viscosity of cyclic oligomers and lack of chemical emissions during polymerization. Using ring-opening polymerization of ETCs with organically modified montmorillonite (OMMT), we intend to ascertain the possibility of preparing high performance PET/clay nanocomposites. Due to the low molecular weight and viscosity, ETCs are successfully intercalated to the clay gallerys, what is evidenced by XRD showing a down-shift of basal plane peak of layered silicate along with TEM investigation. Subsequent ring-opening polymerization of ETCs in-between silicate layers yielded a PET matrix of high molecular weight along with high disruption of layered silicate structure and homogeneous dispersion of the latter in the matrix. Although co-existence of exfoliation and intercalation states of silicate layers after polymerization of ETCs rather than perfect exfoliation was observed, a dramatic increase in d-spacing along with fast polymerization presents us a great potential of cyclic oligomer process in producing a thermoplastic polymer-clay nanocomposites of extremely well-dispersed silicate nanoplatelets and the corresponding high performances.
| Original language | English |
|---|---|
| Pages (from-to) | 2201-2210 |
| Number of pages | 10 |
| Journal | Polymer |
| Volume | 46 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2005 Mar 10 |
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Keywords
- Cyclic oligomer
- Nanocomposite
- Ring-opening polymerization
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
Cite this
Exfoliation of layered silicate facilitated by ring-opening reaction of cyclic oligomers in PET-clay nanocomposites. / Lee, Sang-Soo; Ma, Young Tae; Rhee, Hee Woo; Kim, Junkyung.
In: Polymer, Vol. 46, No. 7, 10.03.2005, p. 2201-2210.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Exfoliation of layered silicate facilitated by ring-opening reaction of cyclic oligomers in PET-clay nanocomposites
AU - Lee, Sang-Soo
AU - Ma, Young Tae
AU - Rhee, Hee Woo
AU - Kim, Junkyung
PY - 2005/3/10
Y1 - 2005/3/10
N2 - Ethylene terephthalate cyclic oligomers (ETCs) have been successfully polymerized to a high molecular weight poly(ethylene terephthalate) (PET) employing the advantages of the low viscosity of cyclic oligomers and lack of chemical emissions during polymerization. Using ring-opening polymerization of ETCs with organically modified montmorillonite (OMMT), we intend to ascertain the possibility of preparing high performance PET/clay nanocomposites. Due to the low molecular weight and viscosity, ETCs are successfully intercalated to the clay gallerys, what is evidenced by XRD showing a down-shift of basal plane peak of layered silicate along with TEM investigation. Subsequent ring-opening polymerization of ETCs in-between silicate layers yielded a PET matrix of high molecular weight along with high disruption of layered silicate structure and homogeneous dispersion of the latter in the matrix. Although co-existence of exfoliation and intercalation states of silicate layers after polymerization of ETCs rather than perfect exfoliation was observed, a dramatic increase in d-spacing along with fast polymerization presents us a great potential of cyclic oligomer process in producing a thermoplastic polymer-clay nanocomposites of extremely well-dispersed silicate nanoplatelets and the corresponding high performances.
AB - Ethylene terephthalate cyclic oligomers (ETCs) have been successfully polymerized to a high molecular weight poly(ethylene terephthalate) (PET) employing the advantages of the low viscosity of cyclic oligomers and lack of chemical emissions during polymerization. Using ring-opening polymerization of ETCs with organically modified montmorillonite (OMMT), we intend to ascertain the possibility of preparing high performance PET/clay nanocomposites. Due to the low molecular weight and viscosity, ETCs are successfully intercalated to the clay gallerys, what is evidenced by XRD showing a down-shift of basal plane peak of layered silicate along with TEM investigation. Subsequent ring-opening polymerization of ETCs in-between silicate layers yielded a PET matrix of high molecular weight along with high disruption of layered silicate structure and homogeneous dispersion of the latter in the matrix. Although co-existence of exfoliation and intercalation states of silicate layers after polymerization of ETCs rather than perfect exfoliation was observed, a dramatic increase in d-spacing along with fast polymerization presents us a great potential of cyclic oligomer process in producing a thermoplastic polymer-clay nanocomposites of extremely well-dispersed silicate nanoplatelets and the corresponding high performances.
KW - Cyclic oligomer
KW - Nanocomposite
KW - Ring-opening polymerization
UR - http://www.scopus.com/inward/record.url?scp=14644438609&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=14644438609&partnerID=8YFLogxK
U2 - 10.1016/j.polymer.2005.01.006
DO - 10.1016/j.polymer.2005.01.006
M3 - Article
AN - SCOPUS:14644438609
VL - 46
SP - 2201
EP - 2210
JO - Polymer (United Kingdom)
JF - Polymer (United Kingdom)
SN - 0032-3861
IS - 7
ER -