Structure and properties of PA6-66/γ-aminopropyltriethoxysilane-modified clay nanocomposites prepared by in situ polymerization

2018 ◽  
Vol 39 (1) ◽  
pp. 16-24 ◽  
Author(s):  
Xiaochao Liu ◽  
Dengwang Lai ◽  
Yuejun Liu ◽  
Pu Shi ◽  
Wenzhi Wang ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
In Situ Polymerization ◽  
Covalent Bond ◽  
Polymer Chains ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Clay ◽  
Transmission Electron

AbstractIn this study, PA6-66/γ-aminopropyltriethoxysilane-modified clay nanocomposites were prepared byin situpolymerization. It was found that the γ-aminopropyltriethoxysilane was chemically grafted onto clay successfully, and the covalent bond was formed between the clay and polymer chains. The transmission electron microscopy (TEM) and X-ray diffraction (XRD) results indicated that intercalated and exfoliated nanocomposites were obtained. The PA6-66 nanocomposites exhibited improved mechanical performance compared to that of neat PA6-66. Most importantly, the PA6-66 nanocomposites showed significantly improved toughness. In comparison with neat PA6-66, the rupture stress and elongation at the break of the nanocomposite with only 0.5 wt% clay increased 91.9% and 91.8%, respectively. The excellent toughness of PA6-66 nanocomposites should be mainly ascribed to the combined effects of strong polymer-clay interaction, the intercalated-exfoliated structures of clay, refined crystalline, formation of γ-form crystals, and decreased crystallinity of PA6-66.

Morphology of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization

2013 ◽  
Vol 457-458 ◽  
pp. 244-247
Author(s):  
Min Li ◽  
Li Guang Xiao ◽  
Hong Kai Zhao
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Reflection Peak ◽  
Basal Reflection ◽  
Scanning Electron

Polyethylene/montmorillonite (PE/MMT) nanocomposites were prepared by in situ polymerization. The morphology of MMT/MgCl2/TiCl4 catalyst and PE/MMT nanocomposites was investigated by scanning electron microscopy (SEM). It can be seen that MMT/MgCl2/TiCl4 catalyst remained the original MMT sheet structures and many holes were found in MMT and the morphology of PE/MMT nanocomposites is part of the sheet in the form of existence, as most of the petal structure. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were carried out to characterize all the samples. XRD results reveal that the original basal reflection peak of PEI1 and PEI2 disappears completely and that of PEI3 become very weak. MMT/MgCl2/TiCl4 catalyst was finely dispersed in the PE matrix. Instead of being individually dispersed, most layers were found in thin stacks comprising several swollen layers.

Synthesis and Electrorheological Characteristics of Conducting Polymer/Clay Nanocomposites

2007 ◽  
Vol 124-126 ◽  
pp. 1083-1086
Author(s):  
Jun Hee Sung ◽  
Hyoung Jin Choi
Keyword(s):  
Conducting Polymer ◽  
Electrorheological Fluid ◽  
Clay Nanocomposites ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Internal Structures ◽  
In Situ Emulsion Polymerization

Nanocomposites of conducting polymers of polyaniline (PANI), poly(oethoxyaniline) (PEOA) and polypyrrole (PPy) with clay prepared via either in-situ emulsion polymerization or solvent intercalation were investigated especially for electrorheological fluid (ER) application. Internal structures of these nanocomposites were examined via wide angle X-ray diffraction (WAXD), and transmission electron microscope (TEM). The intercalated nanostructures analyzed via WAXD and TEM were correlated with the electrical property change originated from the nanoscale interaction between clay and conducting polymer. Moreover, their ER behaviors were measured via rotational rheometer with external electric field controller.

Modification of clays with styrenic ionic liquid by Synthesis of in-situ Polystyrene Nanocomposite

e-Polymers ◽  
2013 ◽  
Vol 13 (1) ◽  
Author(s):  
Mohammad Galehassadi ◽  
Fatemeh Hosseinzadeh ◽  
Mehrdad Mahkam
Keyword(s):  
Electron Microscopy ◽  
Ionic Liquid ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Montmorillonite ◽  
Transmission Electron ◽  
Insitu Polymerization ◽  
Thermal Stability Of

Abstract Nanocomposites of polystyrene (PS) was prepared with new styrenic ionic liquid, N-(4-vinyl benzyl)-(N,N-dimethylamino) pyridinium chloride[VBMAP], surfactants used as organic modifications for the clays. Sodium montmorillonite (Na-MMT) was successfully modified by [VBMAP] to become OMMT through cation exchange technique which is shown by the increase of basalspacing of clay by XRD. The composite material based on polystyrene and organo-modified montmorillonite (OMMT) was prepared by insitu polymerization and characterized. The morphology of the polymer/clay hybrids was evaluated by X-ray diffraction (XRD) ,transmission electron microscopy (TEM) and scanning electron microscopy (SEM), showing good overall dispersion of the clay. The thermal stability of the polymer/clay nanocomposites were enhanced, as evaluated by thermogravimetric analysis.

New Biopolymer Nanocomposite Based Poly Polybutylene Succinate (PBS)/Corn Starch Modified Clay

2020 ◽  
Vol 10 ◽  
Author(s):  
Manar Ghyath Abd-Almutalib Al-Mosawy
Keyword(s):  
Corn Starch ◽  
Polymeric Materials ◽  
Substantial Improvement ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Modified Clay ◽  
Transmission Electron ◽  
The World ◽  
Polybutylene Succinate

Background: Polybutylene succinate (PBS) is a type of biodegradable polymers that have gained considerable attention among scholars when extreme rivalry is increasing rapidly in around the world for finding alternatives to petroleum-based polymeric materials. Methods: A modified clay was used in preparing nanocomposites for the PBS / corn starch mixture. Nanocomposites were prepared by 0.5–5 percent of HDA-MMT being integrated.An x-ray diffraction technique (XRD) was employed to characterize the modifier’s interactionin the clay layer. Results: In order to the nanocomposites to be synthesized, a solution was used to cast off the modified clay and (PBS)/ corn starch) blend. The nanocomposites production was verified by XRD and transmission electron microscopy. Conclusion: Modified clay nanocomposites (PBS / Corn starch) demonstrate higher thermal stability and substantial improvement in contrast to PBS / Corn starch blend.

Preparation and Characterization of Unsaturated Polyester/Organic Montmorillonite Nanocomposites

2014 ◽  
Vol 875-877 ◽  
pp. 150-154 ◽  
Author(s):  
Tsung Yen Tsai ◽  
Wen Chi Chen ◽  
Guan Ren Zhou ◽  
Wei Chuan Shiu
Keyword(s):  
Thermal Properties ◽  
In Situ Polymerization ◽  
Unsaturated Polyester ◽  
Gravimetric Analysis ◽  
Wide Angle ◽  
X Ray Diffraction ◽  
Limiting Oxygen Index ◽  
X Ray ◽  
Modified Clay

This study uses in-situ polymerization method due to organic modified montmorillonite into unsaturated polyester to form a advanced montmorillonite / unsaturated polyester (MMT /UP) nanocomposites. Using of the blasting force generated in situ polymerization patterns show the formation of clay layers is exfoliation structure in polymer and improving of thermal properties, flame retardant properties, and mechanical properties.The d-spacing of organic modified clay could be determined whether the modifier was intercalated into the gallery of clay by applying the wide-angle X-ray diffraction (WXRD). The functional groups of modified clay were measured by Fourier infrared spectroscopy (FT-IR). The dispersion morphologies of MMT / UP nanocomposites were characterized by the wide-angle X-ray diffraction (WXRD) and transmission electron microscopy (TEM). The thermal properties and mechanical properties were investigated by thermal gravimetric analysis (TGA), limiting oxygen index meter (LOI), cone calorimeter (Heat Release Rate) and a dynamic mechanical analyzer (DMA).

scholarly journals In-Situ Preparation of Conducting Polymers/Copper (II)-Maghnite Clay Nanocomposites

2017 ◽  
Vol 14 (2) ◽  
pp. 204-211 ◽  
Author(s):  
Fatima Zeggai ◽  
Mohammed Belbachir ◽  
Aicha Hachmaoui
Keyword(s):  
Conducting Polymers ◽  
In Situ Polymerization ◽  
Ammonium Persulfate ◽  
Clay Nanocomposites ◽  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Preparation ◽  
Ft Ir ◽  
The Fourier Transform

In this work we report a simple way for the conducting polymer nanocomposites synthesis using on algerian hydrophilic natural Montmorillonite (MMT) nanoclay named Maghnite (Mag) as dopant. The electrochemical properties study of the following conducting polymers: poly(4-aminobenzylamine) (P4ABA) and polyaniline (PANI) nanocomposites with copper maghnite (Mag-Cu) were successfully prepared by In-Situ polymerization, in presence of inorganic nanolayers of clay, and oxidizing agent ammonium persulfate. The synthesis of copolymers was developed at different feed mole fractions of monomer. The products were characterized by the Fourier transform Infrared (FT-IR), the ultraviolet-visible (UV–vis) spectroscopies and X-ray diffraction (XRD). The results showed that the in-situ polymerization produced real nanocomposites containing aniline and 4-aminobenzylamine units.

Synthesis, Characterization and Thermal Analysis of Rod-Shaped Polyaniline-Barium Ferrites Nanocomposites

2010 ◽  
Vol 150-151 ◽  
pp. 386-390
Author(s):  
Yuan Xun Li ◽  
Ying Li Liu ◽  
Huai Wu Zhang ◽  
Wei Wei Ling
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Barium Ferrite ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Barium Ferrites ◽  
Thermal Stability Of

The rod-shaped polyaniline (PANI)-barium ferrite nanocomposites were synthesized by in situ polymerization of aniline in the presence of BaFe12O19 nanoparticles with diameters of 60-80 nm. The composites obtained were characterized by infrared spectra (IR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The thermal stability and the composition of the composites were investigated by TG-DTG analysis. The results indicate that the thermal stability of the composites is higher than that of the pure PANI which can be attributed to the interactions existed between PANI chains and ferrite particles.

THE APPLICATION OF TAPANULI CLAY AS NANOFILLER IN NANOCOMPOSITES: SYNTHESIS AND THEIR CHARACTERIZATION

2010 ◽  
Vol 24 (01n02) ◽  
pp. 148-156 ◽  
Author(s):  
ARIADNE L. JUWONO ◽  
RIWANDI SIHOMBING ◽  
YUNI K. KRISNANDI ◽  
SUTARNO ◽  
HANDOKO SUBAWI ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Ultrasonic Method ◽  
Layered Silicates ◽  
X Ray Diffraction ◽  
X Ray ◽  
Maximum Value ◽  
Transmission Electron ◽  
Exchange Agent ◽  
Epoxy Systems

Organo layered silicates (OLS) were successfully synthesized from Tapanuli clay through an intercalated ultrasonic method using hexadecyltrimethylamonium bromide ( HDTMABr ) as a cation exchange agent. Tapanuli clay–epoxy nanocomposites were also successfully synthesized with an in-situ polymerization. X-Ray Diffraction and Transmission Electron Microscope (TEM) results demonstrated a pattern of clay morphology typically found in nanocomposite systems. Although the nanocomposites' diffractogram showed an exfoliation structure, the TEM findings confirmed that the OLS d -spacing is between 2.58 nm (the minimum value) up to 14.74 nm (the maximum value); which indicates the nanocomposites posses a mixed structure between intercalated and exfoliated structures. It was found that the presence of 1wt% Tapanuli organo clay in the epoxy systems provides higher stiffness and higher Heat Deflection Temperature by 30 % and 7 % respectively.

MECHANICAL AND THERMAL PROPERTIES OF MONTMORILLONITE-EPOXY NANOCOMPOSITE

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3247-3253 ◽  
Author(s):  
B. T. MAROUF ◽  
R. BAGHERI ◽  
R. A. PEARSON
Keyword(s):  
Thermal Properties ◽  
In Situ Polymerization ◽  
Mechanical And Thermal Properties ◽  
Toughening Mechanism ◽  
X Ray Diffraction ◽  
X Ray ◽  
Epoxy Nanocomposite ◽  
Transmission Electron ◽  
Stiffening Effect

In this investigation, the mechanical and thermal properties of the montmorillonite-epoxy nanocomposites were studied. The epoxy compounds were prepared by in situ polymerization and the intercalation dispersion were obtained as evidenced using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results reveal remarkable stiffening effect and slight toughening effect of the MMT in the epoxy resin and an insight about the crack tip and notch tip toughening mechanism. According to the DMA, the glass transition temperature increases as increasing the MMT content.

The Characterization and Gas Sensing Properties of Polythiophene Coated V2O5 Nanotubes

2010 ◽  
Vol 654-656 ◽  
pp. 1154-1157 ◽  
Author(s):  
Yu Lu ◽  
Wei Jin ◽  
Wen Chen
Keyword(s):  
Electron Microscopy ◽  
Gas Sensing ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sensing Properties ◽  
Transmission Electron ◽  
Gas Sensing Properties ◽  
Higher Sensitivity

Polythiophene (PTP) coated V2O5 nanotubes were prepared by an in-situ polymerization of thiophene monomers in the presence of prepared V2O5 nanotubes. The nanotubes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), which proved the polymerization of thiophene monomer and the strong interaction between polythiophene and V2O5 nanotubes (VONTs). The gas sensing properties of PTP coated V2O5 nanotubes were studied at room temperature, which was found that PTP coated V2O5 nanotubes could detect ethanol with much higher sensitivity than pure VONTs. The sensing mechanism of PTP coated V2O5 nanotubes to ethanol is presumed to be the synergetic interaction between polythiophene (PTP) and V2O5 nanotubes.

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