Poly(ethylene terephthalate)(PET) nanocomposites filled with fumed silicas by melt compounding

2002 ◽  
Vol 10 (4) ◽  
pp. 221-229 ◽  
Author(s):  
Su-Chul Chung ◽  
Wan-Gyu Hahm ◽  
Seung-Soon Im ◽  
Seong-Geun Oh
Keyword(s):  
Ethylene Terephthalate ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Electrical, Thermal, and Morphological Properties of Poly(ethylene terephthalate)-Graphite Nanoplatelets Nanocomposites

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Basheer A. Alshammari ◽  
Arthur N. Wilkinson ◽  
Ghzzai Almutairi
Keyword(s):  
Electrical Conductivity ◽  
Percolation Threshold ◽  
Ethylene Terephthalate ◽  
Threshold Value ◽  
Morphological Properties ◽  
Degree Of Crystallinity ◽  
Graphite Nanoplatelets ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Graphite nanoplatelets (GNP) were incorporated with poly(ethylene terephthalate) (PET) matrix by melt-compounding technique using minilab compounder to produce PET-GNP nanocomposites, and then the extruded nanocomposites were compressed using compression molding to obtain films of 1 mm thickness. Percolation threshold value was determined using percolation theory. The electrical conductivity, morphology, and thermal behaviors of these nanocomposites were investigated at different contents of GNP, that is, below, around, and above its percolation threshold value. The results demonstrated that the addition of GNP at loading >5 wt.% made electrically conductive nanocomposites. An excellent electrical conductivity of ~1 S/m was obtained at 15 wt.% of GNP loading. The nanocomposites showed a typical insulator-conductor transition with a percolation threshold value of 5.7 wt.% of GNP. In addition, increasing screw speed enhanced the conductivity of the nanocomposites above its threshold value by ~2.5 orders of magnitude; this behavior is attributed to improved dispersion of these nanoparticles into the PET matrix. Microscopies results exhibited no indication of aggregations at 2 wt.% of GNP; however, some rolling up at 6 wt.% of GNP contents was observed, indicating that a conductive network has been formed, whereas more agglomeration and rolling up could be seen as the GNP content is increased in the PET matrix. These agglomerations reduced their aspect ratio and then reduced their reinforcement efficiency. NP loading (>2 wt.%) increased degree of crystallinity and improved thermal stability of matrix slightly, suggesting that 2 wt.% of GNP is more than enough to nucleate the matrix.

In situ Synthesis of Poly(ethylene terephthalate)/layered Silicate Nanocomposites by Polycondensation

2007 ◽  
Vol 19 (5-6) ◽  
pp. 565-580 ◽  
Author(s):  
Doris Pospiech ◽  
Andreas Korwitz ◽  
Hartmut Komber ◽  
Dieter Voigt ◽  
Dieter Jehnichen ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
Control Sample ◽  
Layered Silicate ◽  
In Situ Synthesis ◽  
Layered Silicates ◽  
Preparation Methods ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

The goal of the work presented here was to develop nanocomposites consisting of layered silicates and poly(ethylene terephthalate) (PET). Two nanocomposite preparation methods were compared: first, the usual melt compounding technique, and second, in-situ synthesis of PET in presence of different types of layered silicates. Montmorillonite (MMT) without and with organophilic modification was employed as layered silicate. In most cases, PETs with acceptable properties (molecular weight and discoloration) were synthesized in presence of different MMTs although the molecular weights of the in-situ PETs were lower than the control sample. These materials were used as masterbatch for PET nanocom-posites with 5 wt.% inorganic content. The exfoliation in both types of nanocomposites was not complete, but they showed a good distribution of clay within the polymer matrix.

Effect of Impact Modifier on The Properties of Poly (Ethylene Terephthalate)-Organoclay Nanocomposites

2007 ◽  
Vol 334-335 ◽  
pp. 649-652
Author(s):  
Ulku Yilmazer ◽  
Elif Alyamac
Keyword(s):  
Ethylene Terephthalate ◽  
Shear Stresses ◽  
Clay Particles ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Twin Screw ◽  
Impact Modifier ◽  
Poly Ethylene ◽  
Clay Layers ◽  
The One

The effects of component concentrations and addition order of the components, on the final properties of ternary nanocomposites composed of amorphous poly (ethylene terephthalate) matrix, organically modified clay, and an ethylene / methyl acrylate / glycidyl methacrylate (E-MAGMA) terpolymer were studied. All formulations were prepared by melt compounding of the components with a two-step mixing procedure in a corotating twin-screw extruder. Considering the X-Ray Diffraction, SEM, impact and strain at break results, the best sequence of component addition was the one in which PET was first compounded with E-MA-GMA, later this mixture was compounded with the organoclay in a subsequent run. In this mixing order, the polymer-impact modifier matrix mixture prepared in the first extrusion run has higher melt viscosity than pure PET, thus this matrix can apply high shear stresses on the clay particles and delaminate the clay layers resulting in the best mechanical properties.

Effect of migration of layered nanoparticles during melt blending on the phase morphology of poly (ethylene terephthalate)/polyamide 6/montmorillonite ternary nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (38) ◽  
pp. 29924-29930 ◽  
Author(s):  
Guomin Xu ◽  
Shuhao Qin ◽  
Jie Yu ◽  
Yifu Huang ◽  
Mingqiu Zhang ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Ethylene Terephthalate ◽  
Great Influence ◽  
Polyamide 6 ◽  
Phase Morphology ◽  
Melt Blending ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Selective Localization ◽  
Poly Ethylene

Migration and selective localization of layered nanoparticles during melt compounding have great influence on phase morphology of polymer blends.

Optimizing of vented injection molding on mechanical performance and miscibility of recycled poly(ethylene terephthalate) and polycarbonate blends

2017 ◽  
Vol 37 (3) ◽  
pp. 271-277 ◽  
Author(s):  
Takanori Negoro ◽  
Rutchaneekorn Wongpajan ◽  
Wiranphat Thodsaratpreeyakul ◽  
Jitlada Boonlertsamut ◽  
Supaphorn Thumsorn ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Injection Molding ◽  
Ethylene Terephthalate ◽  
Mechanical Performance ◽  
Thermal Characteristic ◽  
Melt Compounding ◽  
Poly Ethylene Terephthalate ◽  
Superior Mechanical Properties ◽  
Poly Ethylene ◽  
Toughness Mechanism

Abstract Blending of recycled poly(ethylene terephthalate) (RPET) and polycarbonate (PC) was performed by melt compounding. The blends were subsequently fabricated to dumbbell specimens by vented injection molding. The mechanical properties, thermal characteristic and morphology of RPET/PC blends were investigated as a function of PC contents. Vented injection molding presented an advantage for superior mechanical properties of RPET/PC blends. The addition of PC enhanced impact strength and fracture toughness with remaining tensile properties. The glass transition temperatures of PET and PC shifted toward each other, which indicated their partial miscibility of RPET and PC in the blends. The toughness mechanism of RPET and PC was related to core-shell structure and good interfacial adhesion at higher contents of PC.

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