Study of Mechanical and Crystalline Behavior of Polyamide 6/Hytrel/Carbon Nanotubes (CNT) based Polymer Composites

Jogi, Bhagwan F.; Sawant, M.S.; Brahmankar, P.K.; Ratna, Debdatta; Tarhekar, M.C.

doi:10.1016/j.mspro.2014.07.097

Cited by 27 publications

(15 citation statements)

References 15 publications

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“…According to Table , T m increases slightly on incorporation of both ND‐COOH and ND‐EDA indicating their role in the formation of thicker and more perfect crystals . Additionally, this can be attributed to the limited segmental motion of PA6 chains in the presence of nanoparticles and also the high thermal stability of the inorganic fillers . However, only ND‐EDA increases T c and X c of PA6 which can be associated with its nucleating role .…”

Section: Resultsmentioning

confidence: 98%

“…28,50 Additionally, this can be attributed to the limited segmental motion of PA6 chains in the presence of nanoparticles 28 and also the high thermal stability of the inorganic fillers. 51 However, only ND-EDA increases T c and X c of PA6 which can be associated with its nucleating role. 52,53 In the amorphous phase of matrix, the motions of PA6 chains contribute to heterogeneous crystalline growth in the vicinity of ND particles.…”

Section: Morphological Analysismentioning

confidence: 93%

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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: 98%

Section: Morphological Analysismentioning

confidence: 93%

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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“…Different dispersion methods for loading various polymer matrices with CNTs are designed, namely, solution blending, melt blending, in situ polymerization, latex technology, solid‐state shear pulverization, and coagulation spinning . In highly viscous melts, the most popular methods of CNTs incorporation are twin‐screw extrusion technique and roller mixing . These approaches allow increasing the mixing speed realize high shear rate and shear stress that result in broken agglomerates of filler particles and consequently higher uniformity of nanocarbon dispersion in the bulk polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

Белошенко

Voznyak

Vozniak

et al. 2018

Polymer Engineering & Sci

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In this work, by the example of the system of linear low‐density polyethylene—multi‐walled carbon nanotubes (LLDPE/CNTs), specific features of the nanocomposite structure modified by severe plastic deformation (SPD) are studied. The effect of SPD on the mechanical properties and electrical conductivity is analyzed. It is shown that SPD leads to destruction of CNTs aggregates and more homogeneous their distribution. CNTs formed structure is characterized by the presence of large (200–300 nm) aggregates of CNTs and small (<100 nm) CNTs aggregates. It is found that within the range of a small degree of strain (up to e = 4.4), rupture is the prevailing mechanism of agglomerate disintegration, and erosion dominates in the range of high strain (e = 4.4–8.5). SPD‐induced formation of a 3D‐conducting network of CNTS and strengthened LLDPE matrix determines an enhanced set of electrical and mechanical characteristics of the tested composites. POLYM. ENG. SCI., 59:714–723, 2019. © 2018 Society of Plastics Engineers

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“…However, the degree of crystallinity of magnesium-catalyzed cast PA6 have not yet been investigated. The degree of crystallinity for sodium-catalyzed PA6 is about 40-50% based on the literature data [32,33]. The degrees of crystallinity of magnesium-catalyzed semi-finished PA6 rods were analysed and its range between 15% and 27% was found.…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

The Effect of Crystallinity on the Toughness of Cast Polyamide 6 Rods with Different Diameters

Odrobina

Deák²,

Székely

et al. 2020

Polymers

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The present paper concentrates on the toughness and the degree of crystallinity of the magnesium-catalyzed polyamide 6 rods cast in different diametres, which are commonly used for gear manufacturing. Its toughness cannot be regarded as a constant feature due to the casting technology. The mechanical properties of the semi-finished products are sensitive to the manufactured dimension, e.g., cast diameter, which are investigated by the Charpy impact test and tensile impact test. It is generally accepted that the impact strength and tensile-impact strength correlate with the degree of crystallinity beside many other material’s feature. Crystallinity is evaluated by Differential Scanning Calorimetry. The aim of this study is to determine the relationship between toughness and crystallinity of the magnesium-catalyzed cast PA6 rods with different diameters. For the research cast rods between 40 and 300 mm diameter were selected in seven-dimensional steps. Based on the results, it was found that the toughness depends strongly on the diameter size. Furthermore, it is proved that the crystallinity explains 62.3% of the variation of the Charpy’s impact strengths, while the tensile impact method was not suitable to detect the difference between the test samples.

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Study of Mechanical and Crystalline Behavior of Polyamide 6/Hytrel/Carbon Nanotubes (CNT) based Polymer Composites

Cited by 27 publications

References 15 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

Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

The Effect of Crystallinity on the Toughness of Cast Polyamide 6 Rods with Different Diameters

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