Polymer Films Possessing Nanoreinforcements via Organically Modified Layered Silicate

2004 ◽  
Vol 16 (6) ◽  
pp. 1135-1142 ◽  
Author(s):  
Fawn M. Uhl ◽  
Siva Prashanth Davuluri ◽  
Shing-Chung Wong ◽  
Dean C. Webster
Keyword(s):  
Polymer Films ◽  
Layered Silicate ◽  
Organically Modified

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.

Novel biobased nanocomposites from functionalized vegetable oil and organically-modified layered silicate clay

Polymer ◽  
2005 ◽  
Vol 46 (2) ◽  
pp. 445-453 ◽  
Author(s):  
Hiroaki Miyagawa ◽  
Manjusri Misra ◽  
Lawrence T. Drzal ◽  
Amar K. Mohanty
Keyword(s):  
Vegetable Oil ◽  
Layered Silicate ◽  
Organically Modified ◽  
Silicate Clay

Preparation of poly(ε-caprolactone) and its nanocomposites in ε-caprolactam

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Jana Kredatusová ◽  
Jana Svobodová ◽  
Jiří Brožek
Keyword(s):  
Linear Dependence ◽  
Molar Mass ◽  
Layered Silicate ◽  
Polymerization Rate ◽  
Polymerization Temperature ◽  
Solution Polymerization ◽  
Structural Units ◽  
Temperature Range ◽  
Organically Modified

Abstract The solution polymerization of ε-caprolactone (CLO) initiated with stannous 2-ethylhexanoate has been studied in the temperature range 90 - 150 °C. ε-Caprolactam (CLA) was used as a solvent. Although relatively high polymerization temperature was used poly(ε-caprolactone) (PCLO) was formed solely and no CLA structural units were incorporated into its chains. The polymerization rate increased with CLO content in feed and polymerization temperature. A linear dependence of molar mass on yield of PCLO indicates living character of polymerization. When polymerization was carried out in the presence of organically modified MMT, nanocomposites PCLO - layered silicate with an exfoliated structure were obtained

Morphology, mechanical, and thermal properties of aramid/layered silicate nanocomposite materials

2008 ◽  
Vol 23 (9) ◽  
pp. 2296-2304 ◽  
Author(s):  
Sonia Zulfiqar ◽  
Muhammad Ilyas Sarwar ◽  
Ingo Lieberwirth ◽  
Zahoor Ahmad
Keyword(s):  
Water Uptake ◽  
Layered Silicate ◽  
Mechanical And Thermal Properties ◽  
X Ray Diffraction ◽  
Elongation At Break ◽  
Solution Intercalation ◽  
Dimethyl Acetamide ◽  
Transmission Electron ◽  
Organically Modified ◽  
Two Phases

Aramid-based nanocomposites were prepared by solution intercalation techniques using p-aminobenzoic acid-modified montmorillonite. Polyamide was synthesized by reacting 4,4′-oxydianiline with isophthaloyl chloride in dimethyl acetamide. To create chemical interactions between the two phases for better dispersion of organoclay, aramid chains were selectively amine end-capped. The influence of organically modified clay on the morphology was investigated by x-ray diffraction (XRD), polarized optical microscopy (POM), and transmission electron microscopy (TEM). Mechanical, thermal, and water uptake measurements were carried out to further verify other physical properties of the nanocomposites. Tensile strength, modulus, elongation at break, and toughness were improved relative to pure polymer with the addition of 6 wt% organoclay. Thermal-decomposition temperatures of the nanocomposites were in the range 300–450 °C. Water uptake of neat aramid film was rather high (5.7%) and decreased with augmenting organoclay. DSC exhibited increase in the glass transition temperature (118 °C) up to addition of 16 wt% of organoclay.

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.

The role of organically modified layered silicate in the breakup and coalescence of droplets in PBT/PE blends

Polymer ◽  
2006 ◽  
Vol 47 (11) ◽  
pp. 3967-3975 ◽  
Author(s):  
Joung Sook Hong ◽  
Han Namkung ◽  
Kyung Hyun Ahn ◽  
Seung Jong Lee ◽  
Chongyoup Kim
Keyword(s):  
Layered Silicate ◽  
Organically Modified

The incorporation of an organically modified layered silicate in monolithic polymeric matrices produced using hot melt extrusion

2007 ◽  
Vol 103 (2-3) ◽  
pp. 419-426 ◽  
Author(s):  
John G. Lyons ◽  
Harshad Holehonnur ◽  
Declan M. Devine ◽  
James E. Kennedy ◽  
Luke M. Geever ◽  
...  
Keyword(s):  
Layered Silicate ◽  
Hot Melt Extrusion ◽  
Melt Extrusion ◽  
Polymeric Matrices ◽  
Organically Modified ◽  
Hot Melt
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