Effect of Blend Preparation on Electrical, Dielectric, and Dynamical‐Mechanical Properties of Conducting Polymer Blend: SBS Triblock Copolymer/Polyaniline

Soares, Bluma G.; Leyva, Maria Elena

doi:10.1002/mame.200600405

Cited by 26 publications

(23 citation statements)

References 21 publications

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“…The one step in situ polymerization of CPs in the presence of the hosting thermoset resins has been widely considered as a noble approach for the enlargement of more homogeneous conducting adhesive composites. This procedure has been engaged in formulating composites of PANi with several resins [5][6][7][8]. Regarding epoxy resin hosting polymers, this technique has not been well explored.…”

Section: Introductionmentioning

confidence: 99%

Effect of in-situ oxidative preparation on electrical properties of Epoxy/PANi/MWCNTs nanocomposites

Imani

Arabi

Farzi

2016

J Mater Sci: Mater Electron

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Conductive adhesives based on Epoxy/Polyaniline/MWCNT (EPM) system doped with Paratoluensulfonic acid (p-TSA) have been successfully synthesis via different methods and characterized. The composites were prepared by in situ synthesis of aniline/MWCNTs within epoxy matrix and direct physical mixing. X-ray diffraction (XRD) spectrum established the existence of MWCNT in the structure and showed that the morphology of samples was amorphous. FT-IR results confirmed that the composites were successfully synthesis and there is strong coupling between the PANi and MWCNT. The microstructure of the conductive adhesives was considered by field emission scanning electron microscopy. The in situ technique contributes for the development of a conducting path with lower amount of PANi/p-TSA. Electrical properties as a function of PANi and MWCNTs contents have also indicated a great interaction between polyaniline, MWCNT and epoxy matrix by in situ polymerization procedure.

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Section: Introductionmentioning

confidence: 99%

Effect of in-situ oxidative preparation on electrical properties of Epoxy/PANi/MWCNTs nanocomposites

Imani

Arabi

Farzi

2016

J Mater Sci: Mater Electron

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“…The choice of an appropriate insulating matrix should minimize these drawbacks. In this context, styrene–butadiene–styrene (SBS) block copolymer has been shown to be an efficient matrix for the development of PAni‐based conducting polymer composite through melt mixing,22–24 solution mixing,25, 26 and in situ polymerization of aniline in the presence of different amounts of SBS 24, 26–31. The compatibility between PAni and the SBS matrix was enhanced by using dodecylbenzene sulfonic acid (DBSA) as the protonating agent 22, 27…”

Section: Introductionmentioning

confidence: 99%

EMI shielding effectiveness and dielectrical properties of SBS/PAni.DBSA blends: Effect of blend preparation

Magioli

Soares

Sirqueira³

et al. 2012

J of Applied Polymer Sci

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This work investigates the effect of different preparation routes including mechanical mixing and in situ polymerization of aniline on the electromagnetic interference shielding effectiveness (EMI SE) over the X-band (8-12 GHz) frequency range for polyaniline doped with dodecylbenzene sulfonic acid (PAni.DBSA) filled in styrene-butadiene-styrene triblock copolymer matrix. The dc conductivity and dielectrical properties were also investigated. For all systems, the electrical conductivity, dielectric constant, and EMI SE increased with the increase in the concentration of PAni.DBSA. Blends prepared by the in situ polymerization exhibited higher conductivity and dielectric constant and better EMI SE characteristics than the physical blends with similar amount of PAni.DBSA. EMI SE value as high as À35 dB has been achieved with about 30% of PAni.DBSA prepared by the in situ polymerization. Regarding physical blends, those involving PAni.DBSA prepared by a redoping process displayed better EMI SE. For all systems under consideration, the conductivity and EMI SE bear an exponential relationship that can be represented by a master curve.

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“…Opposing the structure observed in samples of the precipitation‐filtration method. Validation of homogeneity of PANI distribution within the composites can be observed elsewhere . The dissimilar organization of CNT in the elastomeric matrix explains the difference observed in thermal, electrical, and mechanical properties between the two preparation techniques.…”

Section: Resultsmentioning

confidence: 65%

“…To introduce a conductive polymer, PANI, into an elastomeric matrix one can use techniques such as thermo‐mechanical mixing, or solution mixing . Solution mixing involves two main routes.…”

Section: Introductionmentioning

confidence: 99%

The structure and electro‐mechanical properties of novel hybrid CNT/PANI nanocomposites

et al. 2013

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Electrically conductive elastomeric nanocomposites containing carbon nanotubes (CNT) and polyaniline (PANI) are reported in the present investigation. The synthesis procedure included an in situ inverse emulsion polymerization of aniline doped with dodecylbenzene sulfonic acid (DBSA) in the presence of CNT and dissolved styrene‐isoprene‐styrene (SIS) block copolymer. The PANI synthesis step was carried out by applying ultrasonic energy. The dispersions obtained were processed by two methods: a recently developed precipitation‐filtration procedure, and a conventional drop‐cast procedure. The techniques developed resulted in homogeneous exfoliated PANI coated nanotubes within the elastomeric matrix. The presence of CNT/PANI in the SIS elastomeric matrix affects thermal, mechanical, and electrical properties of the nanocomposites. The formation of continuous three‐dimensional CNT/PANI networks prepared via the precipitation‐filtration method enhances the nanocomposite properties. Contrarily, the intermittent three‐dimensional network prepared by conventional drop‐cast method leads to inferior properties. Nanocomposites produced by both techniques are observed by HRSEM. The two processing techniques result in different structures, which affect the physical properties of the materials produced. A relatively low percolation threshold for both methods was determined. The Young's modulus of the SIS/CNT/PANI significantly increased in the presence of CNT. The precipitation‐filtration technique yields an improved nanocomposite product compared to the drop‐cast route. POLYM. COMPOS., 35:788–794, 2014. © 2013 Society of Plastics Engineers

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Effect of Blend Preparation on Electrical, Dielectric, and Dynamical‐Mechanical Properties of Conducting Polymer Blend: SBS Triblock Copolymer/Polyaniline

Cited by 26 publications

References 21 publications

Effect of in-situ oxidative preparation on electrical properties of Epoxy/PANi/MWCNTs nanocomposites

Effect of in-situ oxidative preparation on electrical properties of Epoxy/PANi/MWCNTs nanocomposites

EMI shielding effectiveness and dielectrical properties of SBS/PAni.DBSA blends: Effect of blend preparation

The structure and electro‐mechanical properties of novel hybrid CNT/PANI nanocomposites

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