Enhancing dielectric and mechanical behaviors of hybrid polymer nanocomposites based on polystyrene, polyaniline and carbon nanotubes coated with polyaniline

Zia, Tanveer ul Haq; Khan, Ahmad Nawaz; Hussain, Majid; Hassan, Ibrar; Gul, Iftikhar Hussain

doi:10.1007/s10118-016-1867-4

Cited by 23 publications

(11 citation statements)

References 31 publications

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“…Adding nanoparticles (NPs) into polymer melts can lead to fascinating improvements in materials mechanical 1–4 , optical 5–7 , and electrical 8 properties. It is both fundamentally and practically important 9,10 to understand the underlying mechanisms of NPs manipulation on material properties.…”

Section: Introductionmentioning

confidence: 99%

An unexpected N-dependence in the viscosity reduction in all-polymer nanocomposite

et al. 2019

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Adding small nanoparticles (NPs) into polymer melt can lead to a non-Einstein-like decrease in viscosity. However, the underlying mechanism remains a long-standing unsolved puzzle. Here, for an all-polymer nanocomposite formed by linear polystyrene (PS) chains and PS single-chain nanoparticles (SCNPs), we perform large-scale molecular dynamics simulations and experimental rheology measurements. We show that with a fixed (small) loading of the SCNP, viscosity reduction (VR) effect can be largely amplified with an increase in matrix chain length , and that the system with longer polymer chains will have a larger VR. We demonstrate that such -dependent VR can be attributed to the friction reduction experienced by polymer segment blobs which have similar size and interact directly with these SCNPs. A theoretical model is proposed based on the tube model. We demonstrate that it can well describe the friction reduction experienced by melt polymers and the VR effect in these composite systems.

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Section: Introductionmentioning

confidence: 99%

An unexpected N-dependence in the viscosity reduction in all-polymer nanocomposite

et al. 2019

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“…It is well known that adding nanoparticles (NPs) into polymer material can often dramatically alter the associated structure [1,2,3], dynamics [4,5,6] and mechanical [6,7] properties. However, such property alternations resulted from addition of NPs depend on many factors, e.g., interactions between polymer and NP, molecular weight and chain topology of polymer, size and shape of NP, etc.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Properties and Hopping Diffusion of Small Nanoparticle in Polymer/Nanoparticle Composite with Attractive Interaction on Side Group

et al. 2018

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The diffusion dynamics of fullerene (C ) in unentangled linear atactic polystyrene (PS) and polypropylene (PP) melts and the structure and dynamic properties of polymers in interface area are investigated by performing all-atom molecular dynamics simulations. The comparison of the results in two systems emphasises the influence of local interactions exerted by polymer side group on the diffusion dynamics of the nanoparticle. In the normal diffusive regime at long time scales, the displacement distribution function (DDF) follows a Gaussian distribution in PP system, indicating a normal diffusion of C . However, we observe multiple peaks in the DDF curve for C diffusing in PS melt, which indicates a diffusion mechanism of hopping of C . The attractive interaction between C and phenyl ring side groups are found to be responsible for the observed hopping diffusion. In addition, we find that the C is dynamically coupled with a subsection of a tetramer on PS chain, which has a similar size with C . The phenyl ring on PS chain backbone tends to have a parallel configuration in the vicinity of C surface, therefore neighbouring phenyl rings can form chelation effect on the C surface. Consequently, the rotational dynamics of phenyl ring and the translational diffusion of styrene monomers are found to be slowed down in this interface area. We hope our results can be helpful for understanding of the influence of the local interactions on the nanoparticle diffusion dynamics and interfacial properties in polymer/nanoparticle composites.

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“…Various types of nanofillers like ferroelectric ceramics, layered silicates, carbon nanotubes (CNTs), grapheme, etc. are embedded in the different types of polymer matrices to tailor the properties [12][13][14][15][16][17][18][19][20][21]. However, limitation occurs due to the increase in one set of properties at the expense of other set of properties, e.g., higher dielectric properties are originated at the expense of low mechanical performance for higher loading levels of nanofillers.…”

Section: Introductionmentioning

confidence: 99%

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

Khan

Saboor

et al. 2017

Polymer Composites

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To achieve the suitable set of synergistic mechanical, dielectric, and electromagnetic interference shielding properties, polymer blends based on varying the concentration of conductive polymer polyaniline (PANI) in insulative matrix of polyvinyl alcohol (PVA) as well as hybrid composites by adding few layer graphene (FLG) in PVA/PANI polymer blends are prepared using solution casting method. In PVA/PANI blends, by increasing the concentration of PANI, dielectric constant (ε′), dielectric loss (ε″), and total shielding efficiency (SET) of PVA are enhanced from 4 to 80, 0.72 to 164, and 2.5 to 30 dB at 100 Hz, respectively, at the considerable loss of its mechanical properties particularly the tensile strength from 23.9 to 8.5 MPa. For hybrid composites of PVA/PANI/FLG, mechanical as well as dielectric and EMI shielding properties are remarkably enhanced at very low loading levels of FLG. The incorporation of small amounts of FLG in PVA/PANI‐10 wt%, the ε′, ε″, and SET are increased from 4 to 7,907, 0.5 to 406,947.5 and 2.5 to 99 dB at 100 Hz, respectively, along with the considerable increase in the mechanical properties such as tensile strength from 15.7 to 36.3 MPa and modulus from 0.1 to 0.96 GPa at the loss of strain. In comparison to PVA/PANI blends, hybrid composites of PVA/PANI/FLG become a promising system for microwave absorption applications. POLYM. COMPOS., 39:3686–3695, 2018. © 2017 Society of Plastics Engineers

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Enhancing dielectric and mechanical behaviors of hybrid polymer nanocomposites based on polystyrene, polyaniline and carbon nanotubes coated with polyaniline

Cited by 23 publications

References 31 publications

An unexpected N-dependence in the viscosity reduction in all-polymer nanocomposite

An unexpected N-dependence in the viscosity reduction in all-polymer nanocomposite

Interfacial Properties and Hopping Diffusion of Small Nanoparticle in Polymer/Nanoparticle Composite with Attractive Interaction on Side Group

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

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