Rheological behavior of cycloolefin copolymer graphite composites
Yazarlar (3)
Doç. Dr. Alper KAŞGÖZ
Yalova Üniversitesi, Türkiye
Dinçer Akin
Istanbul Üniversitesi, Türkiye
Ali Durmus
Istanbul Üniversitesi, Türkiye
| Makale Türü | Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale) | ||
| Dergi Adı | Polymer Engineering and Science | ||
| Dergi ISSN | 0032-3888 Wos Dergi Scopus Dergi | ||
| Dergi Tarandığı Indeksler | SCI-Expanded | ||
| Makale Dili | İngilizce | Basım Tarihi | 08-2012 |
| Cilt / Sayı / Sayfa | 52 / 12 / 2645–2653 | DOI | 10.1002/pen.23221 |
| Özet |
| In this study, morphological and rheological properties of cycloolefin copolymer (COC)/graphite composites prepared in a twin screw extruder by using various amounts of graphite (G) and expanded graphite (EG) were investigated in detail. Rheological behaviors of the samples were measured in a dynamic oscillatory rheometer in the melt state. Rheology data were analyzed in different ways in order to quantify the microstructural features which indicate the solid-state physical properties of the composite materials. In the linear viscoelastic region, increasing of storage modulus (G') with the filler amount and the van Gurp-Palmen plots were used to determine the percolation threshold which is the critical filler amount for the physical network formation by the G sheets. Percolation threshold values were found to be about 21.5 phr and 3.8 phr for the G- and EG-loaded samples, respectively. Microstructures of the samples which include quite higher amount of filler than the percolation were observed in a scanning electron microscopy. It was found that the sheets of pristine G maintained their original stack form while the EG was successfully dispersed in the COC phase and formed three dimensional house-of-card structures without a compatibilizer. POLYM. ENG. SCI., 2012. © 2012 Society of Plastics Engineers Copyright © 2012 Society of Plastics Engineers. |
| Anahtar Kelimeler |
BM Sürdürülebilir Kalkınma Amaçları
| Atıf Sayıları | |
| SCOPUS | 56 |
| Google Scholar | 61 |