Characterization of polyamide 6/carbon nanotube composites prepared by melt mixing-effect of matrix molecular weight and structure

Faghihi, Morteza; Shojaei, Akbar; Bagheri, Reza

doi:10.1016/j.compositesb.2015.03.049

Cited by 48 publications

(49 citation statements)

References 63 publications

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“…Furthermore, an increase of agglomerate size is seen from 32 to 70.4 µm in this loading range. Compared with quantitative dispersion data for PA6/CNT‐COOH in our previous work, it is inferred that ND‐COOH provides smaller and fewer agglomerates suggesting the potential of this nanoparticle for better dispersion in PA6 matrix. This could be due to the small and spherical shape of ND providing entanglement‐free particles compared to CNTs, making easier its dispersion in a thermoplastic melt.…”

Section: Resultsmentioning

confidence: 61%

“…As shown in Fig. (a), the broader peak of the crystallization curve of PA6/ND‐EDA illustrates the wider distribution of the sizes of crystals indicating the role of nanoparticles as nucleating agents.…”

Section: Resultsmentioning

confidence: 90%

“…Figure displays the TOM micrographs of the nanocomposites. The dark spots observed in the micrographs are relevant to the agglomerates of nanoparticles . It is revealed that the number of agglomerates and their size increase with increasing ND‐COOH concentration up to 1 wt%.…”

Section: Resultsmentioning

confidence: 94%

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Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Karami

Shojaei

2016

Polymer International

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Surface chemistry of as‐received nanodiamond (ND) was first tailored by dry thermal oxidation to obtain carboxylated ND (ND‐COOH) and by wet chemistry to obtain ethylenediamine‐functionalized ND (ND‐EDA). Then, the surface‐functionalized ND particles were dispersed in polyamide 6 (PA6) using the melt‐mixing method. Transmission optical and scanning electron microscopies indicated a fine dispersion at low nanodiamond concentrations, e.g. 0.25 wt%, particularly with ND‐EDA. Differential scanning calorimetry revealed that ND‐EDA favoured the α‐phase crystal and enhanced the degree of crystallinity of PA6. Experimental data indicated that ND‐EDA had considerably improved tensile properties at low concentration of 0.25 wt% compared to ND‐COOH, which was correlated to the fine dispersion and stronger and thicker interphase in the case of ND‐EDA. It was also found that the toughness of PA6 was improved on incorporation of ND‐EDA due to development of microcracking and crazing. © 2016 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 61%

Section: Resultsmentioning

confidence: 90%

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Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Karami

Shojaei

2016

Polymer International

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“…For PBS/MBF composites (Figure 9b,d-f), the polymers are coated on the silane-treated fiber surface, and the voids between PBS matrix and MBF were significantly reduced, suggesting strong interfacial adhesion compared to the untreated fiber. In order to a obtain deeper understanding on the effect of interfacial crystallization on tensile results and interfacial strength, a simulation of material properties was performed using a mathematical Kelly-Tyson model derived from experimental data of PBS/MBF biocomposites, as given by Equation (4) [36,37].…”

Section: Tensile Properties Of Pbs/mbf Biocompositesmentioning

confidence: 99%

“…Especially, Vf is calculated by Equation (5) [38]. In order to a obtain deeper understanding on the effect of interfacial crystallization on tensile results and interfacial strength, a simulation of material properties was performed using a mathematical Kelly-Tyson model derived from experimental data of PBS/MBF biocomposites, as given by Equation (4) [36,37].…”

Section: Tensile Properties Of Pbs/mbf Biocompositesmentioning

confidence: 99%

Silane-Treated Basalt Fiber–Reinforced Poly(butylene succinate) Biocomposites: Interfacial Crystallization and Tensile Properties

et al. 2017

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Abstract:In this work, an economical modifier silane agent-KH550-was used for surface treatment of basalt fiber. Then, a biodegradable poly(butylene succinate) (PBS)/modified basalt fiber (MBF) biocomposite was successfully developed. The effects of silane treatment and fiber mass content on crystalline structure, isothermal crystallization process and mechanical performance of composites were evaluated. The interfacial crystallization of PBS on the surface of MBF was investigated by using a polarized optical microscope (POM). The transcrystalline (TC) structure could be clearly observed and it grew perpendicular to the surface of MBF, which boosted the nucleation ability on PBS crystallization and the strong interfacial interaction between PBS and silane-treated basalt fiber. Under isothermal crystallization kinetics, the incorporation of basalt fiber enhanced the crystallization rate and reduced the crystallization half-time values of composites compared with that of neat PBS due to a heterogeneous nucleation effect. Furthermore, tensile results confirmed that the presence of MBF could greatly improve the tensile strength and modulus. The predicted interfacial shear strength (IFSS) suggested that an enhancement of interfacial bonding could be realized via interfacial crystallization, which was also verified by SEM images. The PBS/MBF biocomposites can be applied in many fields as a low-cost, lightweight, and biodegradable composite material.

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Carbon Nanotubes (CNTs) Composite Materials and Food Packaging

2018

Composites Materials for Food Packaging

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Characterization of polyamide 6/carbon nanotube composites prepared by melt mixing-effect of matrix molecular weight and structure

Cited by 48 publications

References 63 publications

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Morphological and mechanical properties of polyamide 6/nanodiamond composites prepared by melt mixing: effect of surface functionality of nanodiamond

Silane-Treated Basalt Fiber–Reinforced Poly(butylene succinate) Biocomposites: Interfacial Crystallization and Tensile Properties

Carbon Nanotubes (CNTs) Composite Materials and Food Packaging

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