Structures and Characterization of Organoclay-Epoxy-Vinylester Nanocomposites

2002 ◽  
Author(s):  
Farzana Hussain ◽  
Derrick Dean ◽  
Anwarul Haque
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Polymer Matrix ◽  
Vinyl Ester ◽  
Flexural Modulus ◽  
Layered Silicate ◽  
Mechanical Analysis ◽  
Mechanical And Thermal Properties ◽  
Clay Particles ◽  
Nano Clay

The field of polymer-clay nanocomposites has attracted considerable attention as a method of enhancing polymer properties and extending their utility. Layered silicates dispersed as a reinforcing phase in a polymer matrix are one of the most important forms of such inorganic-organic nanocomposites, making them the subject of intense research. We have recently prepared several thermoset-based nanocomposites with improved thermal and mechanical properties. This paper is primarily focused in studying the effects of nano clay particles such as montmorillonite on improving mechanical and thermal properties of the polymer matrix composite. Epoxy and vinyl ester nanocomposites were prepared by adding different weight percentages (0.5%, 1%, 2%, 5% and 10%) of montmorillonite nano clay particles to epoxy and vinyl ester matrices. The results show significant improvements in mechanical and thermal properties of the nanostructured materials with low loading of organo silicates. Thermal property measurement includes dynamic mechanical analysis (DMA). Mechanical properties such as flexural strength and flexural modulus of polymer matrix were improved in nano structured materials owing to their unique phase morphology and improved interfacial interactions. Molecular dispersion of the layered silicate within the cross-linked matrix was verified using Wide Angle X-Ray Diffraction (WAXD) and Transmission Electron Microscopy (TEM) revealing the intercalated nanocomposites were formed.

The influence of adding long basalt fiber on the mechanical and thermal properties of composites based on poly(oxymethylene)

2018 ◽  
Vol 33 (4) ◽  
pp. 435-450 ◽  
Author(s):  
Patrycja Bazan ◽  
Stanisław Kuciel ◽  
Mariola Sądej
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Average Length ◽  
Flexural Modulus ◽  
Basalt Fiber ◽  
Charpy Impact ◽  
Mechanical And Thermal Properties ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Atr Spectroscopy

The work has evaluated the possibility of the potential reinforcing of poly(oxymethylene) (POM) by basalt fibers (BFs) and influence of BFs addition on thermal properties. Two types of composites were produced by injection molding. There were 20 and 40 wt% long BFs content with an average length of 1 mm. The samples were made without using a compatibilizer. In the experimental part, the basic mechanical properties (tensile strength, modulus of elasticity, strain at break, flexural modulus, flexural strength, and deflection at 3.5% strain) of composites based on POM were determined. Tensile properties were also evaluated at three temperatures −20°C, 20°C, and 80°C. The density and Charpy impact of the produced composites were also examined. The influence of water absorption on mechanical properties was investigated. Thermal properties were conducted by the differential scanning calorimetry, thermal gravimetric analysis, and fourier transform infrared (FTIR)-attenuation total reflection (ATR) spectroscopy analysis. In order to make reference to the effects of reinforcement and determine the structure characteristics, scanning electron microscopy images were taken. The addition of 20 and 40 wt% by weight of fibers increases the strength and the stiffness of such composites by more than 30–70% in the range scale of temperature. Manufactured composites show higher thermal and dimensional stability in relation to neat POM.

HIGH-IMPACT PP NANOCOMPOSITES: INFLUENCE OF CLAY CONTENT ON MECHANICAL AND THERMAL PROPERTIES

2013 ◽  
Vol 12 (06) ◽  
pp. 1350039
Author(s):  
L. G. FURLAN ◽  
RICARDO V. B. OLIVEIRA ◽  
ANDRÉIA C. E. MELLO ◽  
SUSANA A. LIBERMAN ◽  
MAURO A. S. OVIEDO ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Impact Strength ◽  
Flexural Modulus ◽  
Clay Content ◽  
Mechanical Analysis ◽  
High Impact ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Transmission Electron ◽  
Izod Impact

The preparation of high-impact polypropylene nanocomposites with different organo-montmorillonite (O-MMT) contents by means of meltprocessing was investigated. The nanocomposite properties were evaluated by transmission electron microscopy (TEM), flexural modulus, izod impact strength, dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). It was noticed that the PP/O-MMT nanocomposites properties were affected by clay content. Exceptional improvements in impact strength were obtained (maximum of 185%) by the use of low O-MMT content. The results showed that higher enhancement on mechanical/thermal properties was obtained by 3 wt.% of O-MMT instead of higher quantities.

Influence of Organo-Clay on Mechanical and Thermal Properties of O-Muscovite/PP Layered Silicate Nanocomposite

2011 ◽  
Vol 364 ◽  
pp. 174-180 ◽  
Author(s):  
Mohd Fadli Ahmad Rasyid ◽  
Md Akil Hazizan ◽  
Jamaliah Mohd Sharif
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Layered Silicate ◽  
Clay Content ◽  
Filler Loading ◽  
Mechanical And Thermal Properties ◽  
Melt Compounding ◽  
Silicate Nanocomposites ◽  
Dsc Analyses ◽  
Organo Clay

O-Muscovite/PP Layered Silicate Nanocomposites were prepared via melt compounding using different filler content. Muscovite was organomodified with Cetyldimethylethylammonium bromide (CEDAB). The thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by organo-clay (O-Muscovite), were studied in order to clarify the effect of O-Muscovite on the O-Muscovite/PP layered silicate nanocomposites by WAXD, TEM and DSC analyses. XRD indicated that O-Mica layers were intercalated and dispersed into polypropylene. Analysis of test data shows that, addition of organo-clay improved mechanical properties of O-Mica/PP nanocomposites. With the incorporation of 5 wt% O-Mica (optimal filler loading) into polypropylene Izod impact increased to 23%. The DSC analyses have shown that the influence of organo-clay on the thermal properties of material was significant in composites with O-Mica as fillers, compared to virgin PP. The enhancements of properties can be caused by the formation of intercalated and exfoliation nanocomposite structure at this clay content and stronger interaction of O-Mica with polymer matrix. At a higher filler loading, degradation in mechanical properties maybe attributes to the formation of agglomerated clay tactoids. O-Muscovite/PP Layered Silicate Nanocomposites were prepared via melt compounding using different filler content. Muscovite was organomodified with cetyltrimethylammoniumbromide (CTAB). The thermal and mechanical properties of nanocomposites, based on polypropylene (PP) filled by organo-clay (O-Muscovite), were studied in order to clarify the effect of O-Muscovite on the O-Muscovite/PP layered silicate nanocomposites by WAXD, TEM and DSC analyses. XRD indicated that O-Mica layers were intercalated and dispersed into polypropylene. It was found that the mechanical and thermal properties of organo-clay nanocomposite possess better properties as compared to the unmodified clay nanocomposites. The reason was partly due to the formation of intercalated and exfoliation nanocomposite structure at this clay content and stronger interaction of O-Mica with polymer matrix.

Evaluation of the physical, chemical, mechanical, and thermal properties of steam-cured PET/polyester cured-in-place pipe

2019 ◽  
Vol 53 (19) ◽  
pp. 2687-2699 ◽  
Author(s):  
Md Nuruddin ◽  
Gamini P. Mendis ◽  
Kyungyeon Ra ◽  
Seyedeh Mahboobeh Teimouri Sendesi ◽  
Tyler Futch ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Outer Layer ◽  
Flexural Modulus ◽  
Physical And Mechanical Properties ◽  
Organic Chemical ◽  
Mechanical And Thermal Properties ◽  
Volatile Organic

Cured-in-place pipe (CIPP), a popular trenchless technology, has gained wide attention for drinking water, sewerage and storm water pipe rehabilitation because of its ease of installation. Here, the physical and thermal properties of steam-cured PET felt/polyester resin CIPPs were studied. 1H NMR and GC-MS analysis was performed to identify the unreacted volatile organic compounds in cured CIPPs and results were compared to uncured resin and laboratory cured liner characterizations. Results indicated that organic chemicals in cured CIPP altered the mechanical properties and may be leached out with water. Significantly, lower porosity, density and amount of unreacted volatile organic compounds were much less in the CIPP's inner layer as compared to its outer layer. Water conditioning was conducted to investigate the influence of water on CIPP physical and mechanical properties. No changes were observed for density and porosity for either the CIPP's inner and outer layer; however, the flexural modulus increased slightly due to unreacted organic chemical leaching from the CIPPs.

The Effect of Glass Fiber Aspect Ratio on Mechanical and Thermal Properties of PU/GF Foam Composites

2010 ◽  
Vol 93-94 ◽  
pp. 210-213
Author(s):  
Bongkot Hararak ◽  
Natcha Prakymoramas ◽  
Wuttipong Rungseesantivanon ◽  
Dumrong Thamumjitr
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Aspect Ratio ◽  
Impact Strength ◽  
Glass Fiber ◽  
Flexural Modulus ◽  
Strength Increase ◽  
Mechanical And Thermal Properties ◽  
Fiber Aspect Ratio ◽  
Heat Distortion Temperature

In this study Polyurethane (PU)/glass fiber (GF) foam composites have been produced. The PU matrix consisted of Polyol and Diphenylmethane Diisocyanate (MDI). A long glass fiber (GF) at different aspect ratio (L/D ratio) was used to study the effect of reinforcement content on their properties such as; mechanical properties (flexural modulus, stress and strain at break, hardness, impact strength) and thermal properties (heat distortion temperature, HDT). It is found that the mechanical properties such as the flexural properties (strength, strain, and modulus) and impact strength increase as increasing GF aspect ratio and optimum at aspect ratio = 7.05. However, GF aspect ratio has a slight effect on the composites hardness due to GF contents and PU densities of PU/GF foam composites are not different, significantly. And the heat distortion temperature slightly increases as GF aspect ratio.

Effect of maleic anhydride grafted polylactic acid concentration on mechanical and thermal properties of thermoplasticized starch filled polylactic acid blends

2021 ◽  
pp. 096739112110041
Author(s):  
Shakti Chauhan ◽  
N Raghu ◽  
Anand Raj
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Maleic Anhydride ◽  
Polylactic Acid ◽  
Coupling Agent ◽  
Thermo Gravimetric Analysis ◽  
Mechanical Analysis ◽  
Strength Properties ◽  
Mechanical And Thermal Properties ◽  
Gravimetric Analysis

Polylactic acid (PLA) is blended with native starch or thermo plasticized starch (TPS) for preparing biodegradable composites. However, poor compatibility of PLA with starch results in the composites with inferior mechanical properties. This study examines the effect of Maleic Anhydride-Grafted-PLA (GMAPLA) coupling agent and its concentration on the extent of improvements in mechanical and thermal properties of PLA –TPS blends. Maleic anhydride was grafted on PLA in Haake torque rheometer, characterized and used as the coupling agent. PLA/TPS (wt/wt) blends (70/30 and 50/50) were prepared by twin screw extrusion. GMAPLA at three different levels 5%, 10% and 15% (wt%) with respect to PLA content was taken to study its effect on mechanical properties of blends. Presence of GMAPLA significantly improved the mechanical properties (tensile, flexural and impact strength) of TPS/PLA blends. Among the three concentrations, 10% GMAPLA in the blend was found to give the maximum improvement in strength properties. Dynamic mechanical analysis and thermo-gravimetric analysis indicated no significant effect of GMAPLA content on transition temperatures and thermal degradation behavior of the blends.

scholarly journals Development of PE/PCL Bilayer Films Modified with Casein and Aluminum Oxide

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3090
Author(s):  
Anita Ptiček Siročić ◽  
Ana Rešček ◽  
Zvonimir Katančić ◽  
Zlata Hrnjak-Murgić
Keyword(s):  
Mechanical Properties ◽  
Thermal Properties ◽  
Water Vapor ◽  
Aluminum Oxide ◽  
Water Vapor Permeability ◽  
Vapor Permeability ◽  
Mechanical And Thermal Properties ◽  
Oxide Compound ◽  
Bilayer Films ◽  
Oxide Particles

The studied samples were prepared from polyethylene (PE) polymer which was coated with modified polycaprolactone (PCL) film in order to obtain bilayer films. Thin PCL film was modified with casein/aluminum oxide compound to enhance vapor permeability as well as mechanical and thermal properties of PE/PCL films. Casein/aluminum oxide modifiers were used in order to achieve some functional properties of polymer film that can be used in various applications, e.g., reduction of water vapor permeability (WVTR) and good mechanical and thermal properties. Significant improvement was observed in mechanical properties, especially in tensile strength as well as in water vapor values. Samples prepared with aluminum oxide particles indicated significantly lower values up to 60%, and samples that were prepared with casein and 5% Al2O3 showed the lowest WVTR value.

Development of Some Promising Approaches for The Toughening of High-Temperature Polymers

1998 ◽  
Vol 519 ◽  
Author(s):  
C. Kumudinie ◽  
J. K. Premachandra ◽  
J. E. Mark ◽  
T. D. Dang ◽  
M. R. Unroe ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Optical Properties ◽  
Thermal Properties ◽  
High Temperature ◽  
Polymer Matrix ◽  
Hybrid Material ◽  
Arylene Ether ◽  
Rubbery Phase ◽  
Maximum Extensibility

AbstractHigh-temperature poly(arylene ether) and hydroxypolybenzoxazole polymers were toughened using dispersed rubbery phases. This rubbery phase was a hybrid material which was in-situ generated within the polymer matrix using mixtures of partially-hydrolyzable trialkoxy and dialkoxy organosilanes with a fully hydrolyzable tetraalkoxysilane. The resulting materials were characterized with regard to their structures, mechanical properties (modulus, ultimate strength, maximum extensibility, and toughness), thermal properties, optical properties, and tendencies to absorb water. Some of the results are presented here.

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