Morphology and mechanical properties of polyamide/clay nanocomposites toughened with NBR/NBR-g-GMA: A comparative study

Jahromi, Ali Ebrahimi; Jahromi, Hamid Reza Ebrahimi; Hemmati, Farkhondeh; Saeb, Mohammad Reza; Goodarzi, Vahabodin; Formela, Krzysztof

doi:10.1016/j.compositesb.2015.12.042

Cited by 68 publications

(12 citation statements)

References 29 publications

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“…In recent years, organic–inorganic nanocomposites have received particular attention in view of their capabilities to give multifaceted features for engineering applications . Polyamide 6 (PA6) is a versatile polymer with acceptable physical and mechanical properties, which has been considered as matrix for conventionally used cost‐effective nanoclays (NC) . Physical, thermal, and mechanical properties of polymers depend largely on the degree of crystallinity, but addition of a small part of an inorganic nanoparticle may ominously govern crystallization kinetics of semi‐crystalline polymers during melt processing .…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…This behavior could be related to the weak compatibility and adhesion between NBR as the dispersed phase and PP as the continuous phase especially at high content of NBR. Ebrahimi et al showed a descending trend for NBR loading of more than 12.5 wt% in PA6/NBR/OMMT nanocomposites. They believed that the enlargement of rubber particles leads to the weakening of thermoplastic and elastomer interfacial area and this phenomenon has detrimental effects on the performance of rubber particles.…”

Section: Resultsmentioning

confidence: 68%

An approach to the optimization of mechanical properties of polypropylene/nitrile butadiene rubber/halloysite nanotube/polypropylene‐g‐maleic anhydride nanocomposites using response surface methodology

et al. 2020

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In this article, response surface methodology (RSM) has been applied to simultaneously optimize the tensile and impact strength of polypropylene (PP)/nitrile butadiene rubber (NBR)/halloysite nanotubes (HNTs)/maleic anhydride (MA)‐grafted‐PP nanocomposites. Three levels of material parameters, including NBR (10, 20, and 30 wt%), HNTs (1, 3, and 5 wt%), and PP‐g‐MA (3, 9, and 15 wt%) as compatibilizers were used to design the experiments according to Box‐Behnken design. In order to investigate the morphology of nanocomposite samples, a scanning electron microscope was used. The model predicted that both the tensile strength and impact strength of nanocomposite were peaked between middle and high levels of HNTs content. There was also a peak for NBR loading in the main effect plot of impact strength. Two‐way interactions of all parameters were significantly affecting both responses. Based on RSM models using the desirability function, the optimum values of input parameters leading to optimized tensile strength and impact strength were predicted to be 17.87, 4.35, and 15 wt% for NBR, HNT, and PP‐g‐MA, respectively. Confirmation experiments were in good agreement with the predicted values.

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“…The exfoliated and delaminated structures appear also to be formed. 31,32 Scanning electron microscopy (SEM) from this gure, the without compatibilizer (W C) sample (Fig. 5a) has a quite smooth fracture surface, indicating no interaction between the XNBR and CR phases.…”

Section: Swelling Behavior Of Nanocompositementioning

confidence: 97%

“…These results are consistent with the observations of TEM micrographs. 27,31 Table 4 shows the DMTA analysis specications for XNBR75/CR25 blend samples containing the NBR-g-GMA compatibilizer and different amounts of graphene. Fig.…”

Section: Swelling Behavior Of Nanocompositementioning

confidence: 99%

Enhanced compatibility, morphology, rheological and mechanical properties of carboxylated acrylonitrile butadiene rubber/chloroprene rubber/graphene nanocomposites: effect of compatibilizer and graphene content

Azizli

Rezaeinia

Rezaeeparto³

et al. 2020

RSC Adv.

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Morphology and mechanical properties of polyamide/clay nanocomposites toughened with NBR/NBR-g-GMA: A comparative study

Cited by 68 publications

References 29 publications

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

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

An approach to the optimization of mechanical properties of polypropylene/nitrile butadiene rubber/halloysite nanotube/polypropylene‐g‐maleic anhydride nanocomposites using response surface methodology

Enhanced compatibility, morphology, rheological and mechanical properties of carboxylated acrylonitrile butadiene rubber/chloroprene rubber/graphene nanocomposites: effect of compatibilizer and graphene content

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