Polyolefin/Layered Silicate Nanocomposites Prepared by In Situ Polymerization

2013 ◽  
pp. 311-339 ◽  
Author(s):  
Naresh H. Tarte ◽  
Liqiang Cui ◽  
SeongIhl Woo
Keyword(s):  
In Situ Polymerization ◽  
Layered Silicate ◽  
Silicate Nanocomposites

scholarly journals UHMWPE-layered silicate nanocomposites by in situ polymerization with tris(pyrazolyl)borate titanium/clay catalyst

2009 ◽  
Vol 20 (3) ◽  
pp. 472-477 ◽  
Author(s):  
Fernando Junges ◽  
Mariana S. Beauvalet ◽  
Bárbara C. Leal ◽  
Adriana C. A. Casagrande ◽  
Fábio F. Mota ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Layered Silicate ◽  
Silicate Nanocomposites ◽  
Clay Catalyst

scholarly journals Poly(η-caprolactone) layered silicate nanocomposites: effect of clay surface modifiers on the melt intercalation process

e-Polymers ◽  
2001 ◽  
Vol 1 (1) ◽  
Author(s):  
Nadège Pantoustier ◽  
Michaël Alexandre ◽  
Philippe Degée ◽  
Cédric Calberg ◽  
Robert Jérôme ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Layered Silicate ◽  
Ammonium Cation ◽  
Mechanical And Thermal Properties ◽  
Melt Intercalation ◽  
Silicate Nanocomposites ◽  
Transmission Electron ◽  
Biodegradable Poly ◽  
Cation Type

AbstractNanocomposites based on biodegradable poly(e-caprolactone) (PCL) and layered silicates (montmorillonite) modified by various alkylammonium cations were prepared by melt intercalation. Depending on whether the ammonium cations contain non-functional alkyl chains or chains terminated by carboxylic acid or hydroxyl functions, microcomposites or nanocomposites were recovered as shown by X-ray diffraction and transmission electron microscopy. Mechanical and thermal properties were examined by tensile testing and thermogravimetric analysis. The layered silicate PCL nanocomposites exhibited some improvement of the mechanical properties (higher Young’s modulus) and increased thermal stability as well as enhanced flame retardant characteristics as result of a charring effect. This communication aims at reporting that the formation of PCL-based nanocomposites strictly depends on the nature of the ammonium cation and its functionality, but also on the selected synthetic route, i.e. melt intercalation vs. in situ intercalative polymerization. Typically, protonated w-aminododecanoic acid exchanged montmorillonite allowed to intercalate ε -caprolactone monomer and yielded nanocomposites upon in situ polymerization, whereas they exclusively formed microcomposites when blended with preformed PCL chains. In other words, it is shown that the formation of polymer layered silicate nanocomposites is not straightforward and cannot be predicted since it strongly depends on parameters such as ammonium cation type and functionality together with the production procedure, i.e., melt intercalation, solvent evaporation or in situ polymerization.

Processing Characteristics of Layered Silicate Nanocomposites With Application to Blown Film

2002 ◽  
Author(s):  
Taner E. Dirama ◽  
Lloyd A. Goettler
Keyword(s):  
Bubble Formation ◽  
Layered Silicate ◽  
Polyamide 6 ◽  
Film Blowing ◽  
Rheological Measurements ◽  
Processing Window ◽  
Dsc Measurements ◽  
Silicate Nanocomposites ◽  
Blown Film

The aim of this study is to investigate the film blowing processing of various polyamide 6-based layered silicate nanocomposites (LSN’s) and to correlate their processing behaviors to the underlying rheology and structure. In-situ polymerized nanocomposites were found to possess a wider processing window compared to the base PA6. Shear and dynamic rheological measurements were employed to correlate the rheological behavior of the nanocomposites to the bubble formation and stability in the film blowing process. The in-situ plymerized LSN melts having higher elastic modulus (G′) were found to perform better in the film blowing process. DSC measurements indicated that nanoclays induce the γ type of crystallinity, which may also play a role in film blowing behavior.

Structure and properties of layered silicate nanocomposites based on polyamide-6 obtained by polymerization in situ and melt blending

2013 ◽  
Vol 8 (11-12) ◽  
pp. 765-772 ◽  
Author(s):  
S. V. Cherdyntseva ◽  
S. I. Belousov ◽  
S. V. Krasheninnikov ◽  
A. L. Vasil’ev ◽  
A. S. Orekhov ◽  
...  
Keyword(s):  
Layered Silicate ◽  
Polyamide 6 ◽  
Melt Blending ◽  
Structure And Properties ◽  
Silicate Nanocomposites

Evaluation of an alternative modification route for layered silicates and synthesis of poly(styrene) layered silicate nanocomposites by in-situ suspension polymerisation

2007 ◽  
Vol 14 (4) ◽  
pp. 361-386 ◽  
Author(s):  
Christopher Mark Liauw ◽  
Graham Clayton Lees ◽  
Roger Norman Rothon ◽  
Arthur Norman Wilkinson ◽  
Pipat Limpanapittayatorn
Keyword(s):  
Layered Silicate ◽  
Layered Silicates ◽  
Silicate Nanocomposites
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