Thermal, mechanical and electromagnetic properties of LLDPE/PANI composites

Passador, Fábio Roberto; Faria, Patrick Valadão de; Backes, Eduardo Henrique; Montanheiro, Thaís L. A.; Montagna, Larissa Stieven; Pinto, Simone de Souza; Pessan, Luiz Antônio; Rezende, Mirabel Cerqueira

doi:10.1007/s00289-016-1862-5

Cited by 20 publications

(25 citation statements)

References 35 publications

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“…Kazimi stated that the increasing PANI content up to an optimum level (3 wt % in this case), the crosslinking bonds were formed via: (1) hydrogen bonding between the PANI and the matrix polymer (with ‐OH and COOH polar groups in LNR), and (2) the action of physical crosslinking points induced by PANI . In which this crosslinking interaction helped to restrict the movement of particles or elastomer chains in blend systems and thus enhancing the mechanical properties of blend materials . When the content of PANI exceeded the optimum level (i.e., 4–5 wt % PANI), it can be observed for negative trend (decreased by 21.1–9.6% for tensile strength and 13.2–9.2% for elongation at break), as shown in Figure .…”

Section: Resultsmentioning

confidence: 92%

“…This phenomenon is supported by the deteriorated mechanical results as shown in Figures . According to Passador et al ., the blending of LLDPE with higher content of PANI (5–40 wt %) showed a morphological change in terms of roughness appearance and significantly observed for 15–40 wt % PANI. Therefore, the very slight morphological changes in this research were expected as the PANI content used here was lower than 5 wt %.…”

Section: Resultsmentioning

confidence: 98%

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Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties

Zailan

Chen

Shahdan

et al. 2019

J of Applied Polymer Sci

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This research was conducted to fabricate thermoplastic natural rubber/polyaniline (TPNR/PANI) blends via melt blending method using an internal mixer and followed by compression molding. The effects of PANI contents between 1 and 5 wt % PANI in the TPNR blends on the mechanical properties, thermal stability, electrical conductivity (impedance), and morphology observation were investigated. The TPNR/3 wt % PANI sample exhibited the highest tensile strength (3.7 MPa), elongation at break (583%), flexural strength (1.8 MPa), flexural modulus (37.0 MPa), and impact strength (7.1 kJ m −2 ). From the aspect of thermal properties, it was found that with the addition of PANI, the thermal stability of the TPNR/PANI increased. Comparing to nonconductive TPNR sample, the incorporation of PANI promoted the electrical conductivity characteristic to PANI-filled TPNR blends which showing a magnitude order of 10 −9 S cm −1 . Scanning electron microscopy micrograph revealed the good distribution of PANI at the optimum content (3 wt % PANI) in the TPNR blends and the good interaction between TPNR and PANI. It can be concluded that the TPNR blends incorporated with a low loading of PANI could be a newly good conductive material.

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 98%

Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties

Zailan

Chen

Shahdan

et al. 2019

J of Applied Polymer Sci

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“…The tensile strength, Young's modulus, and impact strength of NC2 increased by approximately 35, 15, and 10%, respectively, while those of NC3 increased by approximately 6, 8, and 5%, respectively, as compared to the value of neat TPNR. This result can be ascribed to the well‐dispersed GNPs and the good interaction among TPNR matrix, PANI and GNPs, in which the interaction is contributed from the formation of crosslinking bonds via the action of physical crosslinking points induced between TPNR, GNPs, and PANI as well as the hydrogen bonding formation between higher polarity PANI and TPNR matrix due to the polar groups (COOH and OH) in LNR which acted as compatibilizer . However, the further increment of filler loadings of the PANI above 20 wt % (samples NC4 and NC5) showed decreasing trends in tensile and impact properties than that of pure TPNR.…”

Section: Resultsmentioning

confidence: 99%

“…This is because the addition of GNPs and PANI components could limit the movement of TPNR chains and thus reduce the elasticity (increased inflexibility). It is also understood that the deterioration of elongation percentage was because of the brittle nature of PANI …”

Section: Resultsmentioning

confidence: 99%

Mechanical, thermal, and conductivity performances of novel thermoplastic natural rubber/graphene nanoplates/polyaniline composites

Tarawneh

Saraireh

Chen

et al. 2019

J of Applied Polymer Sci

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Conventional polymer blending has a shortcoming in conductivity characteristic. This research addresses the preparation of conductive thermoplastic natural rubber (TPNR) blends with graphene nanoplates (GNPs)/polyaniline (PANI) through melt blending using an internal mixer. The effect of PANI content (10, 20, 30, and 40 wt %) on the mechanical and thermal properties, thermal and electrical conductivities, and morphology observation of the TPNR/GNPs/PANI nanocomposites was investigated. The results showed that the tensile and impact properties as well as thermal conductivity of nanocomposite had improved with the incorporation of 3 wt % of GNPs and 20 wt % of PANI as compared to neat TPNR and reduced with further increase of the PANI content. It was observed that the GNPs and PANI acted as a critical component to improve the thermal stability and electrical conductivity of the TPNR/GNPs/PANI nanocomposites. The most improved conductivity of 5.22 E‐5 S/cm was observed at 3 wt % GNPs and 40 wt % PANI. Variable‐pressure scanning electron microscopy micrograph revealed the good interaction and distribution of GNPs and PANI within TPNR matrix at PANI loadings lower than 30 wt %. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48873.

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“…In the case of melt mixing in extruders, the miscibility can be improved by the incorporation of disperser molecules such as compatibilizer agents, which can be added both as dopant molecules in PANI and as additives in the PANI-polyethylene mixture [2][3][4][5][20][21][22] . In our previous work 23 , we studied the effect of the addition of PANI in LLDPE and observed an improvement in the electrical conductivity with the addition of PANI. Aiming to understand the effect of the branching of the polyethylene chain and the effect of the addition of compatibilizer agent on the electromagnetic properties, the purpose of this work is to obtain composites based on blends of HDPE and …”

Section: Introductionmentioning

confidence: 99%

Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites

et al. 2017

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In this work, polyaniline (PANI) in emeraldine-base form, synthesized by chemical oxidation polymerization, was protonated with hydrochloric acid (HCl). Composites based on high-density polyethylene (HDPE) and linear-low density polyethylene (LLDPE) blends with PANI were prepared in molten condition using a torque rheometer. The effect of compatibilizer agent (maleic anhydridegrafted high density polyethylene, HDPE-g-MA) and different contents of PANI on the blends-based composites was also investigated. Thermal, mechanical, and electromagnetic (electric permittivity) measurements and morphological aspects of the composites were evaluated. The addition of PANI content in the composites decreases the degree of crystallinity of HDPE and LLDPE blends, which implies that PANI particles make it difficult for co-crystallization to occur in the HDPE and LLDPE, respectively. On the other hand, the addition of compatibilizer agent in the HDPE and LLDPE blends increased the degree of crystallinity. The complex parameters of permittivity in the frequency range of 8.2 to 12.4 GHz varied as a function of the PANI content in the blend. It was also observed that the compatibilizer agent increased the composite stiffness and decreased the electric permittivity values. This result shows that the increasing rigidity of the molecular structure of the polyethylene matrix hindered the dissipation of the electromagnetic energy in the sample.

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Thermal, mechanical and electromagnetic properties of LLDPE/PANI composites

Cited by 20 publications

References 35 publications

Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties

Effect of conductive polyaniline in thermoplastic natural rubber blends on the mechanical, thermal stability, and electrical conductivity properties

Mechanical, thermal, and conductivity performances of novel thermoplastic natural rubber/graphene nanoplates/polyaniline composites

Effect of PANI on Thermal, Mechanical and Electromagnetic Properties of HDPE/LLDPE/PANI Composites

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