An explanation of silicate exfoliation in polyacrylonitrile/silicate nanocomposites prepared by in situ polymerization using an initiator adsorbed on silicate

Polymer ◽  
2004 ◽  
Vol 45 (11) ◽  
pp. 3827-3834 ◽  
Author(s):  
Yeong Suk Choi ◽  
In Jae Chung
Keyword(s):  
In Situ Polymerization ◽  
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

Synthesis and characterization of polyolefin–silicate nanocomposites: a catalyst intercalation and in situ polymerization approach†

1999 ◽  
pp. 2179-2180 ◽  
Author(s):  
Jeffrey S. Bergman ◽  
Geoffrey W. Coates ◽  
Hua Chen ◽  
Emmanuel P. Giannelis ◽  
Malcolm G. Thomas
Keyword(s):  
In Situ Polymerization ◽  
Synthesis And Characterization ◽  
Silicate Nanocomposites

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.

Improvement in mechanical, physical and biological properties of eucalyptus and pine woods by raw pine resin in situ polymerization

2021 ◽  
Vol 166 ◽  
pp. 113495
Author(s):  
Andrey Pereira Acosta ◽  
Kelvin Techera Barbosa ◽  
Sandro Campos Amico ◽  
André Luiz Missio ◽  
Rafael de Avila Delucis ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Biological Properties ◽  
Pine Resin
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