Mechanical properties and structure of solvent processed novolac resin/layered silicate: development of interphase region

RSC Advances ◽  
2015 ◽  
Vol 5 (98) ◽  
pp. 80875-80883 ◽  
Author(s):  
Parisa Jahanmard ◽  
Akbar Shojaei
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Novolac Resin ◽  
Modified Clays ◽  
Interphase Region ◽  
Organically Modified ◽  
Mixing Method ◽  
Silicate Layers

It was shown that the solution mixing method is able to disperse natural and organically modified clays in novolac resin efficiently. Development of a strong interphase region around the silicate layers was also explored.

Biodegradable Polyester / Layered Silicate Nanocomposites

2002 ◽  
Vol 740 ◽  
Author(s):  
Pralay Maiti ◽  
Carl A. Batt ◽  
Emmanuel P. Giannelis
Keyword(s):  
Mechanical Properties ◽  
Storage Modulus ◽  
Layered Silicate ◽  
Layered Silicates ◽  
Melt Extrusion ◽  
Biodegradable Polyester ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Silicate Nanocomposites ◽  
Organically Modified

ABSTRACTNanocomposites of α-hydroxy polyester, polylactide (PLA) and β-hydroxy polyester, polyhydroxybutyrate (PHB) with layered silicates have been successfully prepared by melt extrusion of PLA and PHB with organically modified montmorillonite (MMT) and fluoromica. The mechanical properties of the nanocomposites are improved compared to the neat polymers. Storage modulus increase up to 40% compared with the pure polymers by adding only 2–3 wt% nanoclay. Biodegradation can be controlled by the choice of the nanoclay used.

Nanocomposites Based on Montmorillonite/Acrylic Copolymer for Aqueous Coating of Soft Surfaces

2009 ◽  
Vol 151 ◽  
pp. 129-134 ◽  
Author(s):  
Onur Yılmaz ◽  
Aurica P. Chiriac ◽  
Catalina Natalia Cheaburu ◽  
Loredana E. Nita ◽  
Gürbüz Gülümser ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Acrylic Copolymer ◽  
Modified Montmorillonite ◽  
Organically Modified Montmorillonite ◽  
Film Forming ◽  
Organically Modified ◽  
Polymerization Method ◽  
Structural Characterizations

Nanocomposites based on layered silicate organically modified montmorillonite (Cloisite 20A) and acrylic comonomers (butyl acrylate and methyl methacrylate) were prepared by simple “in situ” batch emulsion polymerization method. The particle size and zeta potential of the emulsions were analyzed. The structural characterizations of the nanocomposites were performed by FTIR, thermal behaviors of the films were investigated by DSC, mechanical properties of the films were tested by DMA and intercalation success was viewed by XRD. The mechanical properties of the nanocomposites were improved significantly especially at the temperatures above Tg. The ultrasonication process was found to be useful for increasing the homogeneity of the emulsions and intercalation success. The obtained nanocomposite emulsions were applied on garment leathers in a finishing formulation as aqueous binders sharing good film forming ability and elasticity.

Materials With Improved Properties From Polymer-Ceramic Nanocomposites

1999 ◽  
Vol 576 ◽  
Author(s):  
Frank-Dieter Kuchta ◽  
Piet J. Lemstra ◽  
Andrew Keller ◽  
Lawrence F. Batenburg ◽  
Hartmut R. Fischer
Keyword(s):  
Clay Minerals ◽  
Crystallization Rate ◽  
Layered Silicate ◽  
Research Field ◽  
Polymer Chains ◽  
Homogeneous Distribution ◽  
Modified Clay ◽  
Organically Modified ◽  
Important Field ◽  
Silicate Layers

ABSTRACTIn order to link the fundamental research field of polymer crystallization with the technical important field of composite materials polymer-layered silicate nanocomposites from polyethylene (PE) are prepared and their morphology and properties are investigated. The effect of an external confinement introduced by highly anisotropic silicate layers of organically modified clay minerals on crystal growth and nanocomposite properties has been studied. The prepared nanocomposites of organically modified clay minerals and PE exhibit not only a homogeneous distribution of individual silicate layers but also of tactoids. The isothermal crystallization rate of PE in the corresponding nanocomposite at 120 °C is increased in the composite material due to the action of the silicate layers. A significant effect on crystal phase has not been observed so far but from X-ray experiments, however the crystal size seems to be influenced. The thermal stability of the nanocomposites is significantly enhanced and the decomposition mechanism has been changed due to the presence of the layered silicates within the host polymer acting as a barrier for the diffusion of small molecules like oxygen. Due to the none permanent attachment of the polymer chains to the silicate surface the thermal-mechanical properties are only moderately enhanced at low temperature while the glass transition temperature remains unaffected.

Epoxy-Layered Silicate and Epoxy MWCNTs Nanocomposites

2011 ◽  
Vol 146 ◽  
pp. 160-169 ◽  
Author(s):  
A. Stan ◽  
I. Dinca ◽  
C. Ban ◽  
S. Ilina ◽  
Dan Donescu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Epoxy Resin ◽  
Epoxy Polymer ◽  
Layered Silicate ◽  
Diglycidyl Ether ◽  
Curing Agent ◽  
Fluid Behavior ◽  
Cloisite 30B ◽  
Organically Modified

The paper deals with the rheological properties of epoxy resin additivated with organically modified montmorillonites, carbon nanotubes and nanocarbon. The paper also presents the influence of nanoadditives over composites mechanical properties. The epoxy polymer is diglycidyl ether of bisphenol A (DGEBA) and the curing agent is an aliphatic tetraamine. Organically modified montmorillonites Cloisite 30B and Cloisite 93A, MWCNTs and laser synthesized nanocarbon were used to synthesize nanocomposites by dispersing each in an epoxy resin. The dispersion was achieved through mechanical and sonic methods. The epoxy resin additivated with nanosized fillers was rheologically tested to study the dispersion influence. The sonic dispersion of nanoadditives is observed to drastically influence the rheological behavior of the suspensions. Newtonian fluid behavior disappears as the additive loading increases. The work mentions the influence of nanoadditives on the manufacturing process of epoxy /glass fibre and epoxy/ carbon fibre laminated composites.

Physical and mechanical properties of linear low-density polyethylene/cycloolefin copolymer/layered silicate nanocomposite

2015 ◽  
Vol 37 (11) ◽  
pp. 3167-3174 ◽  
Author(s):  
S. Sánchez-Valdes ◽  
E. Ramírez-Vargas ◽  
L.F. Ramos de Valle ◽  
J.G. Martinez-Colunga ◽  
J. Romero-Garcia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Physical And Mechanical Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene

Studies on Nanostructured Polyurethane/Clay Interpenetrating Polymer Networks

2005 ◽  
Vol 475-479 ◽  
pp. 1001-1004
Author(s):  
Ninglin Zhou ◽  
Xiao Xian Xia ◽  
Li Li ◽  
Shao Hua Wei ◽  
Jian Shen
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Interpenetrating Polymer Networks ◽  
Absorption Properties ◽  
Tensile Testing Machine ◽  
Swelling Agent ◽  
Silicate Layers ◽  
Polyurethane Matrix

A novel exfoliated polyurethane (PU)/clay Interpenetrating Polymer Networks (IPNs) nanocomposite has been synthesized with polyurethane and organoclay. MTPAC is used as swelling agent to treat Na-montmorillonite for forming organoclay. The results indicate that there is very good compatibility between organoclay and PU. Nanoscale silicate dispersion was analyzed by XRD. The mechanical properties of the nanocomposites have been measured by tensile testing machine. The nanocomposites show obviously improved physical and mechanical properties when compared with the pure polymer. Additionally, PU /MTPAC- clay shows lower water absorption properties than pure PU do. In addition, the reinforcing and intercalating mechanism of silicate layers in polyurethane matrix are discussed.

Dispersion of organically modified clays within n-alcohols

2006 ◽  
Vol 297 (2) ◽  
pp. 541-545 ◽  
Author(s):  
N.H. Tran ◽  
G.R. Dennis ◽  
A.S. Milev ◽  
G.S.K. Kannangara ◽  
P. Williams ◽  
...  
Keyword(s):  
Modified Clays ◽  
Organically Modified
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