Effect of PA6T on morphology and electrical conductivity in PA66/PA6T/PPE/multiwalled carbon nanotube nanocomposites

Son, Kwonsang; Kim, Jeongyup; Kim, Donghyeon; Min, Byong Hun

doi:10.1016/j.compscitech.2018.05.049

Cited by 12 publications

(6 citation statements)

References 16 publications

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“…Comparison of T m and T g values for 10T/10X copolyamides with other common aliphatic, semi-aromatic, and aromatic nylons. ,− …”

Section: Resultsmentioning

confidence: 99%

“…Among them, semi-aromatic nylons show great potential because they possess the superb rigidity and heat-resistant properties of fully aromatic polyamides and the desirable melt processing properties of aliphatic polyamides. At present, the main varieties of heat-resistant semi-aromatic nylons based on terephthalic acid are poly(tetramethylene terephthalamide) (PA4T), poly(pentamethylene terephthalamide) (PA5T), poly(hexamethylene terephthalamide) (PA6T), poly(nonamethylene terephthalamide) (PA9T), poly(decamethylene terephthalamide) (PA10T), , and poly(dodecamethylene terephthalamide) (PA12T) . Often single-component polymers cannot meet the application requirements for their target markets; e.g., the melting points of pure PA4T and PA6T are 430 and 370 °C, respectively, which are higher than their decomposition temperatures which does not allow them to be melt processed.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

Feng

Zou

Ding

et al. 2019

Ind. Eng. Chem. Res.

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A series of 10T/10X (X = 6, 8, 10, 12, 14, 16) copolyamides was synthesized, and the thermal and mechanical properties were investigated. The effects of the lengths of alkyl chains of diacids on their resultant properties were studied, and we found that the introduction of a small amount of aliphatic diacid hardly changed the lattice parameters of the copolyamides. The T m and T c values of the 10T/10X copolyamides decreased and had a zigzag oscillation behavior as the lengths of alkyl chains on the diacids increased. A density functional theory study showed that the observed behaviors were related to the change in hydrogen bond strength and the length mismatches of the diacids in the copolymer chains. The tensile strength decreased slightly, while the elongation at break increased significantly with an increase in the chain length of the aliphatic diacid; further, the notched impact strength decreased but was still higher than PA10T.

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“…Comparison of T m and T g values for 10T/10X copolyamides with other common aliphatic, semi-aromatic, and aromatic nylons. ,− …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

Feng

Zou

Ding

et al. 2019

Ind. Eng. Chem. Res.

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“…Chang Jae Lee et al showed different sequences of mixing (PPE/PS)/PA66/CNT blend nanocomposites, in which CNTs dispersion and localization were induced by PA66 that has a high affinity for the nanofillers; they inferred that CNTs migrated from an unfavorable PS/PPE phase to a more favorable PA66 phase in a “filler-transfer-induced dispersion” mechanism [ 29 ]. Moreover, the effect of CNT dispersion in a miscible PPE/PS blend, studied by Qiyan Zhang et al, attributed the melt viscosity in relation to the PS amount, in which an optimum balance in the breakage of CNT agglomerate between the intrusion of polymer(matrix) molecules into CNT agglomerates and disintegrates the agglomerates by shear stress, contributing to a better dispersion and subsequently increased electrical conductivity [ 30 ]. Bing Du et al investigated the blend of SAN/PPE filled with a functionalized multi-walled carbon nanotube, in which a pristine multi-walled carbon nanotube (MWCNT) remained in the pre-localized styrene-acrylonitrile (SAN) phase, while the functionalized MWCNT migrated to the PPE phase due to the grafted PS on the nanofillers surface [ 31 ].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanotube Migration in a Compatibilized Blend System, Leading to Kinetically Induced Enhancement in Electrical Conductivity and Mechanical Properties

2023

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Kinetic factors that facilitate carbon nanotube (CNT) migration in a polymer blend from a high-density polyethylene (HDPE) phase to a poly (p-phenylene ether) (PPE) phase were studied, with the objective to induce CNT migration and localization at the interface. Herein, a CNT filler was pre-localized in an HDPE polymer and then blended with PPE at different blend compositions of 20:80, 40:60, 60:40, and 80:20 of PPE/HDPE at a constant filler concentration of 1 wt%. The level of CNT migration was studied at different mixing times of 5 and 10 min. The electrical conductivity initially increased by 2–3 orders of magnitude, with an increase in the PPE content up to 40%, and then it decreased significantly by up to 12 orders of magnitude at high PPE content up to 100%. We determined that the extent of migration was related to the difference in the melt viscosity between the constituent polymers. A triblock copolymer styrene-ethylene/butylene-styrene (SEBS) was used to improve the blend miscibility, and 2 wt% copolymer was found to be the optimum concentration for the electrical properties for the two blend compositions of 20:80 and 80:20 of PPE/HDPE, at a constant filler concentration of 1 wt%. The introduction of the SEBS triblock copolymer significantly increased the conductivity almost by almost four orders of magnitude for PPE/HDPE/80:20 composites with 1 wt% CNT and 2 wt% SEBS compared to the uncompatibilized blend nanocomposite. The mechanical strength of the compatibilized blend nanocomposites was found to be higher than the unfilled compatibilized blend (i.e., without CNT), uncompatibilized blend nanocomposites, and the pristine blend, illustrating the synergistic effect of adding nanofillers and a compatibilizer. SEM and TEM microstructures were used to interpret the structure–property relationships of these polymer blend nanocomposites.

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“…14,[23][24][25] In addition, nanofibers produced by electrospinning can be produced by adding various filler materials such as CNT, graphene, nano-diamond. A number of study reported in the literature indicated that the structures can be strengthened by adding filler materials [26][27][28][29] However, it is one of the difficulties to ensure the homogeneous distribution of these fillers in the resin. The inclusion of micro or nanofillers in the resin liquid adversely affects the homogeneity and viscosity of the resin.…”

Section: Introductionmentioning

confidence: 99%

Improving adhesive behavior of fiber reinforced composites by incorporating electrospun Polyamide-6,6 nanofibers in joining region

Esenoğlu

Barışık

Tanoğlu

et al. 2022

Journal of Composite Materials

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Adhesive joining of fiber reinforced polymer (CFRP) composite components is demanded in various industrial applications. However, the joining locations frequently suffer from adhesive bond failure between adhesive and adherent. The aim of the present study is improving bonding behavior of adhesive joints by electrospun nanofiber coatings on the prepreg surfaces that have been used for composite manufacturing. Secondary bonding of woven and unidirectional CFRP parts was selected since this configuration is preferred commonly in aerospace practices. The optimum nanofiber coating with a low average fiber diameter and areal weight density is succeed by studying various solution concentrations and spinning durations of the polyamide-6.6 (PA 66) electrospinning. We obtained homogeneous and beadles nanofiber productions. As a result, an average diameter of 36.50 ± 12 nm electrospun nanofibers were obtained and coated onto the prepreg surfaces. Prepreg systems with/without PA 66 nanofibers were hot pressed to fabricate the CFRP composite laminates. The single-lap shear test coupons were prepared from the fabricated laminates to examine the effects of PA 66 nanofibers on the mechanical properties of the joint region of the composites. The single-lap shear test results showed that the bonding strength is improved by about 40% with minimal adhesive use due to the presence of the electrospun nanofibers within the joint region. The optical and SEM images of fractured surfaces showed that nanofiber-coated joints exhibited a coherent failure while the bare surfaces underwent adhesive failure. The PA66 nanofibers created better coupling between the adhesive and the composite surface by increasing the surface area and roughness. As a result, electrospun nanofibers turned adhesive failure into cohesive and enhanced the adhesion performance composite joints substantially.

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Effect of PA6T on morphology and electrical conductivity in PA66/PA6T/PPE/multiwalled carbon nanotube nanocomposites

Cited by 12 publications

References 16 publications

Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

Effect of Aliphatic Diacid Chain Length on Properties of Semiaromatic Copolyamides Based on PA10T and Their Theoretical Study

Carbon Nanotube Migration in a Compatibilized Blend System, Leading to Kinetically Induced Enhancement in Electrical Conductivity and Mechanical Properties

Improving adhesive behavior of fiber reinforced composites by incorporating electrospun Polyamide-6,6 nanofibers in joining region

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