scholarly journals Hybrid Effect of Nanosilicates and MWNT on Mechanical, Thermal, and Dynamic Mechanical Properties of Polypropylene

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Priyanka Pandey ◽  
Smita Mohanty ◽  
Sanjay K. Nayak
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Dynamic Mechanical Properties ◽  
Hybrid Effect ◽  
Step Process ◽  
Dynamic Mechanical ◽  
Transmission Electron ◽  
Higher Temperature ◽  
Clay Layers ◽  
Thermal Stability Of

A two-step process was used to prepare PP/MAPP/C15A/MWNT ternary nanocomposites system. The effect of the addition of MWNT on the delamination of clay layers in the polymer matrix has been studied through XRD. The similar crystallinity level was noticed after the addition of clay and MWNT together in the PP matrix through XRD. Higher mechanical properties of the ternary nanocomposites system were noticed than neat PP and its binary nanocomposites systems. Differential scanning calorimeter (DSC) technique was utilized to investigate the effect of both nanofillers on crystallization temperature (TC). And a shift in TC towards higher temperature was noticed in all the nanocomposites. Thermogravimetric analysis revealed an improved thermal stability of the ternary nanocomposites system. The dynamic mechanical response of PP and its binary and ternary nanocomposite systems was evaluated. The dispersion of the nanoparticles was investigated employing transmission electron microscopy (TEM). The combined effect of clay and MWNT on the properties of PP was investigated and summarized.

Dynamic Mechanical Properties and Thermal Stability of PTT/POE/OMMT Nanocomposites

2011 ◽  
Vol 366 ◽  
pp. 306-309
Author(s):  
Ming Tao Run ◽  
Na Li ◽  
Bing Tao Xing ◽  
Meng Yao ◽  
Wen Zhou
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Dynamic Mechanical Properties ◽  
Thermal Gravimetric ◽  
Dynamic Mechanical ◽  
Thermal Gravimetric Analyzer ◽  
Transmission Electron ◽  
Reinforcing Agent ◽  
Thermal Stability Of

The dynamic mechanical properties, phase morphology and thermal stability of the poly(trimethylene terephthalate)/maleinized poly(octene-ethylene)/organo-montmorillonite nanocomposites (PTT/POE/OMMT) were investigated by using the thermodynamic mechanical analyzer (DMA), transmission electron microscopy (TEM) and thermal gravimetric analyzer (TGA), respectively. The results suggest that the modulus of elasticity of the PTT/POE/OMMT nanocomposite increases, and the glass transition temperature first slightly decreases and then increases with increasing OMMT content because that the TPP plays the role of plasticizer and OMMT plays the role of reinforcing agent. OMMT disperse evenly in the polymer matrix with most of the strip-like sheet morphology. The addition of the OMMT does not apparently affect the thermal stability of the PTT/POE/OMMT nanocomposite.

High Temperature Dynamic Mechanical Properties Characterization of Polymer Coatings via Nanoindentation

2021 ◽  
pp. 1-17
Author(s):  
Yusuke Matsuda ◽  
Aref Samadi-Dooki ◽  
Yinjie Cen ◽  
Gisela Vazquez ◽  
Luke Bu
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
High Temperatures ◽  
Mechanical Response ◽  
Polymer Coatings ◽  
Dynamic Mechanical Properties ◽  
Industrial Applications ◽  
Dynamic Mechanical ◽  
Mechanical Properties Characterization

Abstract Polymer coatings are widely used in industrial applications. The mechanical properties of these polymer coatings are known to vary with temperature and deformation rate. The characterization of the dynamic mechanical properties of these coatings at high temperatures via traditional uniaxial testing is challenging due often to their brittleness and small size. In this paper, the mechanical properties of polymer coatings are reported with emphasis on their dynamic mechanical properties at temperatures up to 280 °C characterized by a dynamic nanoindentation technique with a sharp indenter tip. Nanoindentation was used to characterize the mechanical response with emphasis on dynamic mechanical properties of polymer coatings enclosed in a high-temperature stage. To verify the method, the viscoelastic properties of a reference PET were also characterized by uniaxial cyclic tensile testing which exhibited an excellent agreement with the proposed technique. The proposed nanoindentation method can be applied to other polymer coatings and thin films that are used in applications at high temperatures.

scholarly journals Effect of Stacking Sequence and Sodium Bicarbonate Treatment on Quasi-Static and Dynamic Mechanical Properties of Flax/Jute Epoxy-Based Composites

Materials ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1363 ◽  
Author(s):  
Vincenzo Fiore ◽  
Luigi Calabrese
Keyword(s):  
Mechanical Properties ◽  
Sodium Bicarbonate ◽  
Surface Treatment ◽  
Mechanical Response ◽  
Sodium Bicarbonate Solution ◽  
Charpy Impact ◽  
Cost Effective ◽  
Dynamic Mechanical Properties ◽  
Stacking Sequence ◽  
Dynamic Mechanical

The present paper deals with the investigation of quasi-static and dynamic mechanical response of epoxy-based composites reinforced with flax and/or jute plain weave fabrics. In order to evaluate the influence of the stacking sequence, two monolithic laminates reinforced with flax or jute fibers and two hybrid flax/jute laminates were manufactured through the vacuum infusion technique. Furthermore, an eco-friendly and cost-effective surface treatment based on fiber soaking in a sodium bicarbonate solution was employed to improve the fiber-matrix adhesion. The mechanical characterization (by means of quasi-static flexural, dynamic mechanical thermal analysis and Charpy impact tests) allowed to evidence that the sodium bicarbonate treatment leads to noticeable improvement of the mechanical performances of flax reinforced composites, whereas jute composites experience a slight decrease of their mechanical properties. Overall, the hybridization allows to achieve intermediate mechanical properties among those of monolithic composites. Furthermore, the coupled action of hybridization and surface treatment does not lead to a beneficial and reliable effect on the mechanical response of the resulting composites.

Preparation and Properties of cis-1,4-Polybutadiene Rubber/OMMT/AT Nanocomposites

2012 ◽  
Vol 586 ◽  
pp. 80-84 ◽  
Author(s):  
Zheng Gu ◽  
Guo Jun Song ◽  
Wei Sheng Liu
Keyword(s):  
Mechanical Properties ◽  
Solution Method ◽  
Rolling Resistance ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Excellent Thermal Stability ◽  
Dynamic Mechanical ◽  
Polybutadiene Rubber ◽  
Butadiene Polymerization ◽  
Higher Temperature

The cis-1,4-polybutadiene rubber(BR)/organic montmorillonite(OMMT) /attpulgite(AT) nanocomposites were prepared by using solution method. The results of TEM showed that the OMMT and AT layers were dispersed in BR matrix on nano-scale. Compared with the pure BR, the tensile strength of BR/OMMT/AT nanocomposites increased by 600% when added 6% OMMT/AT. The results showed that the conversion of butadiene polymerization was higher than 90% by using recycled solvent. The nanocomposites had excellent thermal stability. The dynamic mechanical analysis showed that Tg of BR/OMMT/AT nanocomposites shifted to higher temperature, and the nanocomposites had a good rolling resistance. The composites displayed better dynamic mechanical properties.

Fire-safe and environmentally friendly nanocomposites based on layered double hydroxides and ethylene propylene diene elastomer

RSC Advances ◽  
2016 ◽  
Vol 6 (31) ◽  
pp. 26425-26436 ◽  
Author(s):  
Debdipta Basu ◽  
Amit Das ◽  
De-Yi Wang ◽  
Jinu Jacob George ◽  
Klaus Werner Stöckelhuber ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Flame Retardant ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Thermal Stability Of

The capability of layered double hydroxide has been explored as a potential flame retardant filler and the effect of the mechanical properties, dynamic mechanical properties, and thermal stability of the composites was also studied.

Dynamic mechanical behavior of phenoxy/carbon nanotube composites: assessment through different functionalization

2011 ◽  
Vol 31 (2-3) ◽  
Author(s):  
Mahdi Najjar Disfani ◽  
Seyed-Hassan Jafari ◽  
Hossin Ali Khonakdar
Keyword(s):  
Mechanical Properties ◽  
Storage Modulus ◽  
Dynamic Mechanical Properties ◽  
Melt Mixing ◽  
Dynamic Mechanical ◽  
Transmission Electron ◽  
Dispersion State ◽  
Nanotube Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract Nanocomposites of phenoxy resin with various functionalized multi-walled carbon nanotubes (CNTs) were investigated to assess and compare the effect of functionalization on dynamic mechanical properties. Non-functionalized and various functionalized CNTs containing -COOH, -OH, and -NH2 groups were utilized for preparing phenoxy/CNT nanocomposites through a melt mixing process. Dynamic mechanical properties of nanocomposites, storage modulus (E′), and loss tangent (tanδ) data in temperature range of 20–120°C were collected. Transmission electron microscopy and optical microscopy were also used to gain an insight into the CNTs dispersion state within phenoxy matrix. The functionalized CNTs had no adverse effect on storage modulus of phenoxy. The morphological investigation revealed the highest degree of agglomeration and the shortest tube lengths for the CNT-COOH within phenoxy matrix.

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