scholarly journals Role of Molecular Weight in Polymer Wrapping and Dispersion of MWNT in a PVDF Matrix

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 162 ◽  
Author(s):  
Muthuraman Namasivayam ◽  
Mats R. Andersson ◽  
Joseph Shapter
Keyword(s):  
Molecular Weight ◽  
Electrical Properties ◽  
Polymer Matrix ◽  
Polymer Nanocomposite ◽  
Scanning Calorimetry ◽  
Crystallisation Behaviour ◽  
Effective Dispersion ◽  
Thermal And Electrical Properties ◽  
Polymer Wrapping

The thermal and electrical properties of a polymer nanocomposite are highly dependent on the dispersion of the CNT filler in the polymer matrix. Non-covalent functionalisation with a PVP polymer is an excellent driving force towards an effective dispersion of MWNTs in the polymer matrix. It is shown that the PVP molecular weight plays a key role in the non-covalent functionalisation of MWNT and its effect on the thermal and electrical properties of the polymer nanocomposite is reported herein. The dispersion and crystallisation behaviour of the composite are also evaluated by a combination of scanning electron microscopy (SEM) and differential scanning calorimetry (DSC).

Recent Advances in Polymer-Based Nanocomposites: A Brief Review

2021 ◽  
Vol 13 ◽  
Author(s):  
S. K. Parida
Keyword(s):  
Electrical Properties ◽  
Polymer Nanocomposites ◽  
Polymer Matrix ◽  
Polymer Nanocomposite ◽  
Review Article ◽  
Nanosized Particles ◽  
Mechanical And Electrical Properties ◽  
Potential Applications ◽  
Manufacturing Techniques ◽  
Host Polymer

: This presented review article is constructed to be an extensive source for polymer nanocomposite researchers covering the relation of structure with property, manufacturing techniques, and potential applications when a small number of nanosized particles are added to a host polymer matrix. The exceptional structural, mechanical, and electrical properties of polymer nanocomposites after the addition of inorganic solid nanoparticles are elucidated by the large surface area of doped nanoparticles that interact with host polymer matrices. Due to the generation of ideas, the conventional methods of preparation of polymer nanocomposites are made more interesting. Hence, this brief review presents a sketch of different synthesis techniques, characterization, applications, and safety concerns for polymer nanocomposites.

Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization

2012 ◽  
Vol 32 (4-5) ◽  
pp. 235-243 ◽  
Author(s):  
Khezrollah Khezri ◽  
Vahid Haddadi-Asl ◽  
Hossein Roghani-Mamaqani ◽  
Mehdi Salami-Kalajahi
Keyword(s):  
Molecular Weight ◽  
Electron Transfer ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Polymer Matrix ◽  
Clay Content ◽  
Xrd Analysis ◽  
Size Exclusion ◽  
Atom Transfer ◽  
Scanning Calorimetry

Abstract A newly developed initiation system, activators regenerated by electron transfer (ARGET), was employed to synthesize polystyrene-organoclay nanocomposites via atom transfer radical polymerization (ATRP). ARGET ATRP was applied since it is carried out at significantly low concentrations of the catalyst and environmentally acceptable reducing agents. Conversion and molecular weight evaluations were performed using gravimetry and size exclusion chromatography (SEC), respectively. According to the findings, addition of clay content resulted in a decrease in conversion and molecular weight of nanocomposites. However, an increase of polydispersity index is observed by increasing nanoclay loading. The living nature of the polymerization is revealed by 1H NMR spectroscopy and extracted data from the SEC traces. X-ray diffraction (XRD) analysis shows that organoclay layers are disordered and delaminated in the polymer matrix and exfoliated morphology is obtained. Thermogravimetric analysis (TGA) shows that thermal stability of the nanocomposites is higher than the neat polystyrene. A decrease in glass transition temperature of the samples by increasing organoclay content is observed by differential scanning calorimetry (DSC). Transmission electron microscopy (TEM) reveals that clay layers are partially exfoliated in the polymer matrix containing 2 wt% of organomodified montmorillonite (PSON 2) and a dispersion of partially exfoliated clay stacks is formed.

Study Of Thermal And Mechanical Properties Of Clay/Polymer Nanocomposite Synthesized Via Modified Solution Blending

MRS Advances ◽  
2017 ◽  
Vol 2 (49) ◽  
pp. 2757-2762 ◽  
Author(s):  
Oscar Hernandez-Guerrero ◽  
Rubén Castillo-Pérez ◽  
Mireya Lizbeth Hernández-Vargas ◽  
Bernardo Fabián Campillo-Illanes
Keyword(s):  
Polymer Matrix ◽  
Polymer Nanocomposite ◽  
Hydrophobic Property ◽  
Scanning Calorimetry ◽  
Solution Blending ◽  
Nano Clay ◽  
Order Of Magnitude ◽  
Mixing Matrix ◽  
Mmt Clay ◽  
Matrix Concentration

ABSTRACTThe incorporation of layered nano-silicates in polymer matrix greatly enhances the properties of the polymer. At present, there are many applications of polymer nanocomposites including coatings and architectural, they are also parts of automotive and construction industry among others. The acrylics employed at the present study were based on butyl acrylate (BA), styrene (STY), and methacrylic acid (MAA), and the nano-clay was Na-montomorillonite (MMT). The MMT clay was added to the polymer, which is the mixing matrix in a physical state solution called blend. Furthermore, their mechanical, thermal and wettability of especially prepared acrylic montmorillonite (MMT) nanocomposites were performed. By increasing the MMT in the polymer matrix concentration the Young’s modulus tends to increase it by an order of magnitude. However, by Differential Scanning Calorimetry (DSC), the thermograms show an increase in the glass transition temperature of nanocomposites for all weight percentages of MMT. Also, the wetting angle was determined, in order to know how much water is retained on the surface of the nanocomposite; the results showed that by increasing the particle of nano clay in the polymer matrix will induce a hydrophobic property to the nanocomposite.

scholarly journals Effect of carbon nanotube (CNT) functionalization in epoxy-CNT composites

2018 ◽  
Vol 7 (6) ◽  
pp. 475-485 ◽  
Author(s):  
Sagar Roy ◽  
Roumiana S. Petrova ◽  
Somenath Mitra
Keyword(s):  
Tensile Strength ◽  
Glass Transition ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Polymer Matrix ◽  
Strong Dependence ◽  
Synthesis Process ◽  
Maximum Enhancement ◽  
Glass Transition Temperatures ◽  
Thermal And Electrical Properties

AbstractThe effect of carbon nanotube (CNT) functionalization in altering the properties of epoxy-CNT composites is presented. The presence of functional groups effectively influenced the colloidal behavior of CNTs in the precursor epoxy resin and the hardener triethylenetetramine (TETA), which affected the synthesis process and eventually the interfacial interactions between the polymer matrix and the CNTs. The physical, thermal, and electrical properties of the composites exhibited strong dependence on the nature of functionalization. At a 0.5-wt% CNT loading, the enhancement in tensile strength was found to be 7.2%, 11.2%, 11.4%, and 14.2% for raw CNTs, carboxylated CNTs, octadecyl amide-functionalized CNTs, and hydroxylated CNTs, respectively. Glass transition temperatures (Tg) also varied with the functionalization, and composites prepared using hydroxylated CNTs showed the maximum enhancement of 34%.

The role of graphene interactions and geometry on thermal and electrical properties of epoxy nanocomposites: A theoretical to experimental approach

2020 ◽  
Vol 90 ◽  
pp. 106638 ◽  
Author(s):  
Xoan F. Sánchez-Romate ◽  
Virginia Saiz ◽  
Alberto Jiménez-Suárez ◽  
Mónica Campo ◽  
Alejandro Ureña
Keyword(s):  
Electrical Properties ◽  
Experimental Approach ◽  
Epoxy Nanocomposites ◽  
Thermal And Electrical Properties

scholarly journals Interface modulation in multi-layered BaTiO3 nanofibers/PVDF using the PVP linker layer as an adhesive for high energy density capacitor applications

2020 ◽  
Vol 1 (4) ◽  
pp. 680-688 ◽  
Author(s):  
Prateek ◽  
Shahil Siddiqui ◽  
Ritamay Bhunia ◽  
Narendra Singh ◽  
Ashish Garg ◽  
...  
Keyword(s):  
Energy Density ◽  
Barium Titanate ◽  
Polymer Matrix ◽  
Polyvinylidene Fluoride ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
High Energy Density ◽  
Interface Modulation

In this work, we have studied the role of a linker across the interface in a multi-layered polymer nanocomposite-based capacitor using barium titanate (BT) nanofibers (NFs) as nanofillers and polyvinylidene fluoride (PVDF) as the polymer matrix.

The role of CNC surface modification on the structural, thermal and electrical properties of poly(vinylidene fluoride) nanocomposites

Cellulose ◽  
2020 ◽  
Vol 27 (7) ◽  
pp. 3821-3834 ◽  
Author(s):  
Mikel Rincón-Iglesias ◽  
Erlantz Lizundia ◽  
Daniela M. Correia ◽  
Carlos M. Costa ◽  
Senentxu Lanceros-Méndez
Keyword(s):  
Surface Modification ◽  
Electrical Properties ◽  
Vinylidene Fluoride ◽  
Poly Vinylidene Fluoride ◽  
Thermal And Electrical Properties

Role of carbon on the thermal and electrical properties of graphene- enriched silicon oxycarbides

2020 ◽  
Vol 46 (18) ◽  
pp. 28156-28164 ◽  
Author(s):  
Jella Gangadhar ◽  
Ankur Maheshwari ◽  
Rajendra K. Bordia ◽  
C.N. Shyam Kumar ◽  
Christian Kubel ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Thermal And Electrical Properties

scholarly journals Challenges of the Modeling Methods for Investigating the Interaction between the CNT and the Surrounding Polymer

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Roham Rafiee ◽  
Timon Rabczuk ◽  
Reza Pourazizi ◽  
Junhua Zhao ◽  
Yancheng Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Properties ◽  
Computational Modeling ◽  
Polymer Nanocomposite ◽  
Modeling Methods ◽  
Scale Models ◽  
Future Challenges ◽  
Key Factor ◽  
Bonding Properties ◽  
Thermal And Electrical Properties

The interaction between the carbon nanotubes (CNT) and the polymer is a key factor for determining the mechanical, thermal, and electrical properties of the CNT/polymer nanocomposite. However, it is difficult to measure experimentally the interfacial bonding properties between the CNT and the surrounding polymer. Therefore, computational modeling is used to predict the interaction properties. Different scale models, from atomistic to continuum, are critically reviewed addressing the advantages, the disadvantages, and the future challenges. Various methods of improvement for measuring the interaction properties are described. Finally, it is concluded that the semicontinuum modeling may be the best candidate for modeling the interaction between the CNT and the polymer.

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