Preparation of Polymer-Clay Nanocomposites by Melt Mixing in a Twin Screw Extruder: Using On-Line SAOS Rheometry to Assess the Level of Dispersion

2014 ◽  
Vol 29 (1) ◽  
pp. 63-70 ◽  
Author(s):  
S. Mould ◽  
J. Barbas ◽  
A. V. Machado ◽  
J. M. Nóbrega ◽  
J. A. Covas
Keyword(s):  
Clay Nanocomposites ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Twin Screw ◽  
On Line

On-line Visualization of PS/PP Melting Mechanisms in a Co-rotating Twin Screw Extruder

2004 ◽  
Vol 19 (4) ◽  
pp. 342-349 ◽  
Author(s):  
H. Chen ◽  
U. Sundararaj ◽  
K. Nandakumar ◽  
M. D. Wetzel
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Twin Screw ◽  
On Line

Compatibilization Effect of Polyfunctional Monomers on PP/TPU Blends

2011 ◽  
Vol 322 ◽  
pp. 394-397 ◽  
Author(s):  
Lan Fang Guan ◽  
Jin Zhou Chen
Keyword(s):  
Mechanical Properties ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Polyfunctional Monomer ◽  
Trimethylolpropane Triacrylate ◽  
Twin Screw ◽  
Compatibilization Effect

This paper mainly researched how polyfunctional monomers affect the Compatibilization of PP/TPU blends. With triallylisocyanurate (TAIC) and trimethylolpropane triacrylate (TMPTA) which belong to polyfunctional monomers as compatibilizers, various PP/TPU blends were prepared via melt mixing by using a twin-screw extruder. It is investigated that the effect of polyfunctional monomer on the mechanical properties, morphology and melt flowing behavior of the blends. The results show that the compatibility of PP/TPU is improved by adding moderate TAIC or TMPTA, and the compatibilization effect of TMPTA is superior to TAIC, especially when the content of monomers is 3 phr.

Melt-mixing by novel pitched-tip kneading disks in a co-rotating twin-screw extruder

2011 ◽  
Vol 66 (1) ◽  
pp. 103-110 ◽  
Author(s):  
Yasuya Nakayama ◽  
Eiji Takeda ◽  
Takashi Shigeishi ◽  
Hideki Tomiyama ◽  
Toshihisa Kajiwara
Keyword(s):  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Twin Screw

Effect of Type and Concentration of Ionomer Compatibilizer on the Hdpe/ Ionomer/ Clay Nanocomposites Morphology

2010 ◽  
Vol 644 ◽  
pp. 17-20 ◽  
Author(s):  
S. López-García ◽  
Saul Sánchez-Valdés ◽  
L.F. Ramos de Valle
Keyword(s):  
Electron Microscopy ◽  
High Density Polyethylene ◽  
Clay Nanocomposites ◽  
Screw Extruder ◽  
Melt Mixing ◽  
X Ray ◽  
Twin Screw ◽  
Thermal Stability Of ◽  
Cloisite 20A ◽  
Scanning Electron

A study of the effect of an ionomer compatibilizer (surlyn® 9520 and 9721, both with zinc as the neutralizing cation) on the morphology and properties of a high density polyethylene (HDPE) - montmorillonite clay nanocomposite was carried out. The nanoclay used was cloisite 20A®. Polyethylene /Ionomer /Clay nanocomposites were prepared via melt mixing in a twin screw extruder. The nanoclay dispersion and exfoliation were examined through X-Ray Difraction (XRD) and Scanning Electron Microscopy (SEM). TGA was carried out to determine the effect of nanoclay on the thermal stability of the HDPE nanocomposites. Results showed that both ionomers impart a marked compatibility between the polymer and the nanoclay, promoting the exfoliation of the nanoclay within the HDPE matrix. Nonetheless, ionomer 9520 (with the higher degree of neutralization) at 10 and 12 wt% content produced completely exfoliated morphologies, whereas, the ionomer 9721 produced a lesser degree of exfoliation with few tactoids.

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