Non-isothermal crystallization kinetics of polyamide 66/glass fibers/carbon black composites

Layachi, Abdelheq; Frihi, Djamel; Satha, Hamid; Séguéla, Roland; Gherib, S.

doi:10.1007/s10973-016-5286-0

Cited by 37 publications

(66 citation statements)

References 42 publications

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“…The inorganic silver fi ller leads to heterogeneous nucleation and improves the crystallinity of PA6 matrix; however, silver nanoparticles hinder the orientation of PA6 crystals and restricts the movement of the molecular chains of PA6. These two contradictory infl uences usually lead to decreased crystallization rate (ΔT c1/2 ), crystallization temperature, and enhanced crystallinity of nano-Ag/PA6 nanocomposite, as reported elsewhere 18, 19 .…”

supporting

confidence: 58%

“…The friction behavior of nano-Ag/PA6 nanocomposites with 0.9% Ag content decreased dramatically. Nano-Ag/PA6 may possess antiwear and friction reducing properties; however, Ag contents exceeding 0.7% may affect the mechanical strength and molecular weight of the composites, thereby resulting in reduced performance [19][20][21] .…”

Section: The Crystallization and Melting Behaviors Of Pa6 And Pa6/ag mentioning

confidence: 99%

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Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties

Feng

Liu

et al. 2017

Polish Journal of Chemical Technology

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Polyamide 6 (noted as PA6)/Ag nanocomposites were prepared by an in situ solution polymerization method. AgNO 3 was used as fi ller and was directly reduced to silver nanoparticles resulting in uniformly dispersed nanoparticles in the PA6 matrix. The thermal stability, crystallization, melting performance, and dispersion properties of the PA6/Ag nanocomposites were studied using transmission electron microscopy (TEM), thermogravimetric analysis (TG), differential thermal scanning calorimetry (DSC), X-ray diffraction (XRD), and polarized light microscopy (POM). Furthermore, the mechanical and tribological behaviors of as-prepared nanocomposites were evaluated using universal tensile testing, impact testing, and friction testing machines. The results show that Ag-nanoparticles are evenly dispersed in PA6 and decrease in size with increasing Ag content. Whereas the crystallinity increased with increasing Ag content, the crystallization temperature of the nanocomposites did not change signifi cantly. However, the mechanical and tribological properties of the nanocomposites increased compared with pure PA6.

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supporting

confidence: 58%

Section: The Crystallization and Melting Behaviors Of Pa6 And Pa6/ag mentioning

confidence: 99%

Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties

Feng

Liu

et al. 2017

Polish Journal of Chemical Technology

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“…The relative degree of crystallinity was obtained as a function of temperature (Figure ); Figure (A2,B2) resulted from Figure (A1,B1) using

X (T) = \int_{T_{0}}^{T} (\frac{d H_{c}}{d T}) d T / \int_{T_{0}}^{T_{\infty}} (\frac{d H_{c}}{d T}) d T

illustrates the curve of crystallinity percentage versus temperature that the horizontal axis in Figure (A2,B2) can be transformed to a time scale in Figure (A3,B3) . In fact, in nonisothermal crystallization, time, and temperature are related as follows:

t = true(T_{0} - T true) / φ

where T represents the temperature at the time t . T 0 is the temperature at the initial stages of crystallization ( t = 0), and φshows the cooling rate.…”

Section: Resultsmentioning

confidence: 99%

“…With the aim of making the Avrami equation applicable to the nonisothermal crystallization, Jeziorny suggested that Z t can be modified as the eq. shows:

\log Z_{c} = \frac{\log Z_{t}}{φ}

where

Z_{c}

is the modified growth rate constant and φ represents the cooling rate. By means of eq.…”

Section: Resultsmentioning

confidence: 99%

Calorimetric and rheokinetic analyses merged to capture crystallization kinetics in polyamide/clay nanocomposites: Revisiting predictability of models

Kermaniyan

Garmabi

Saeb

2018

J of Applied Polymer Sci

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Crystallization kinetics of polymer/clay systems was the subject of numerous investigations, but still there are some ambiguities in understanding thermal behavior of such systems under isothermal and nonisothermal circumstances. In this work, isothermal rheokinetic and nonisothermal calorimetric analyses are combined to demonstrate crystallization kinetics of polyamide6/nanoclay (PA6/NC) nanocomposites. As the main outcome of this work, we detected different regimes of crystallization and compared them by both isothermal dynamic rheometry and nonisothermal differential scanning calorimetry (DSC), which has not been simultaneously addressed yet. A novel analysis, somehow different from the common ones, is used to convert the storage modulus data to crystallinity values leading to more reasonable Avrami parameters in isothermal crystallization. It was found based on isothermal rheokinetic studies that increase of NC content and shear rate are responsible for erratic behavior of Avrami exponent and crystallization rates. Optimistically, however, isothermal crystallization by rheometer was confirmed by DSC. Nonisothermal calorimetric evaluations suggested an accelerated crystallization of PA6 upon increasing NC content and cooling rate. The crystallization behavior was quantified applying Ozawa (r2 between 0.070 and 0.975), and combinatorial Avrami–Ozawa (r2 between 0.984 and 0.998) models, where the latter appeared more appropriate for demonstration of nonisothermal crystallization of PA6/NC nanocomposites. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46364.

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“…In order to investigate the effect of GF and TiO 2 on the crystallization of polymers and better understand the relationship between the structure and properties of materials, it is essential to study the crystallization kinetics, especially the non-isothermal crystallization kinetics, which is closer to the actual processing condition. 13,14 The non-isothermal kinetics parameters of nylon 10T/66/TiO 2 /GF were carried out using the Jeziorny 15 and the Mo equations. 16 The non-isothermal crystallization activation energy was calculated by Kissinger method.…”

Section: Introductionmentioning

confidence: 99%

Non-isothermal crystallization, yellowing resistance and mechanical properties of heat-resistant nylon 10T/66/titania dioxide/glass fibre composites

Liu

Zhang

et al. 2019

RSC Adv.

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Herein, we report novel heat-resistant nylon 10T/66/titania dioxide/glass fibre (nylon 10T/66/TiO 2 /GF) composites based on as-synthesised nylon 10T/66, which is a copolymer of poly(decamethylene terephthalamide) (nylon 10T). The non-isothermal crystallization behaviors of nylon 10T/66 and nylon 10T/66/TiO 2 /GF composites were investigated by differential scanning calorimetry (DSC). Jeziorny and Mo equations were used to analyse the crystallization kinetics, whereas the Kissinger method was applied to calculate the activation energy. It turned out that the introduction of TiO 2 and GF could accelerate the crystallization of nylon 10T/66 and exhibited an effective heterogeneous nucleation effect. In addition, we conducted yellowing resistance and mechanical property analysis of the nylon 10T/66/TiO 2 /GF composites. The above results successfully demonstrated that the heat-resistant nylon 10T/66/TiO 2 /GF composites possess higher crystallization temperature and crystallization rate, whiter color, and better yellowing resistance and mechanical properties than previously as-synthesised nylon 10T/66. Consequently, nylon 10T/66/TiO 2 /GF composites have great potential to be used as a heatresistant engineering plastic.

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Non-isothermal crystallization kinetics of polyamide 66/glass fibers/carbon black composites

Cited by 37 publications

References 42 publications

Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties

Preparation of Ag nanoparticles-reinforced polyamide 6 nanocomposites by in situ polymerization and investigation of its properties

Calorimetric and rheokinetic analyses merged to capture crystallization kinetics in polyamide/clay nanocomposites: Revisiting predictability of models

Non-isothermal crystallization, yellowing resistance and mechanical properties of heat-resistant nylon 10T/66/titania dioxide/glass fibre composites

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