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Journal articles on the topic 'Partially Exfoliated Nanocomposite'

Author: Grafiati
Published: 28 May 2022
Last updated: 30 July 2025

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1

Ferreira, Rodholfo da Silva Barbosa, Caio Henrique do Ó. Pereira, Rene Anisio da Paz, Amanda Melissa Damião Leite, Edcleide Maria Araújo, and Hélio de Lucena Lira. "Influence of Processing Type in the Morphology of Membranes Obtained from PA6/MMT Nanocomposites." Advances in Materials Science and Engineering 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/659148.

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The nanocomposites have an extensive use in the current process of membrane preparation, taking into account their unique features as membranes. Thus, the study of nanocomposite processing to obtain membranes is highly important. In this work, Brazilian clay was used (Brasgel PA) for the preparation of polyamide/clay nanocomposite. The nanocomposites were produced in a high rotation homogenizer and in a twin screw extruder. From the nanocomposites and pure polymers processed in the two equipments, membranes were prepared by the immersion-precipitation method, using formic acid as solvent. By X
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Bashar, Mohammad, Pierre Mertiny, and Uttandaraman Sundararaj. "Effect of Nanocomposite Structures on Fracture Behavior of Epoxy-Clay Nanocomposites Prepared by Different Dispersion Methods." Journal of Nanomaterials 2014 (2014): 1–12. http://dx.doi.org/10.1155/2014/312813.

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The effects of organic modifier and processing method on morphology and mechanical properties of epoxy-clay nanocomposites were investigated. In this study, the preparation of nanocomposites by exfoliation-adsorption method involved an ultrasonic mixing procedure, and mechanical blending was used for in situ intercalative polymerization. The microstructure study revealed that the organoclay, which was ultrasonically mixed with the epoxy, partially exfoliated and intercalated. In contrast, organoclay remained in phase-separated and flocculated state after the mechanical blending process. Tensil
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Kojuch, Luana Rodrigues, Keila Machado Medeiros, Dayanne Diniz de Souza Morais, Edcleide Maria Araújo, and Hélio de Lucena Lira. "Study of Nanocomposites of Polyamide 6.6/National Bentonite Clay." Materials Science Forum 727-728 (August 2012): 894–98. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.894.

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Polymers nanocomposites are a class of materials where inorganic substances with nanometrics dimensions are modified and used as dispersed loads in polymers matrices. In this work, polyamide 6.6 was chosen because of its excellent chemical, mechanical and thermal properties. The bentonite clay was treated with quaternary ammonium salt (Cetremide®) to make it organophilic and to improve the interaction with the polymer matrix. It was verified by the Torque Rheometry that the system with salt presented a bigger torque in relation to the torque of the system with untreated clay and pure polyamide
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4

Park, B. J., and Hyoung Jin Choi. "Effect of Surface Characteristics on Polystyrene/Clay Nanocomposite via Emulsion Polymerization." Solid State Phenomena 111 (April 2006): 187–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.111.187.

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Polystyrene/clay nanocomposite with organically modified montmorillonite was synthesized via emulsion polymerization. Organic styrene monomer was first intercalated into intergalley of the clay hosts, followed by a typical emulsion polymerization with surfactant and initiator. To investigate the effect of clay loading, we also prepared PS/clay nanocomposites with different clay contents. Wide angle X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed that the emulsion polymerization of PS in the presence of clay produces partially exfoliated and intercalated nanocomposites
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5

Lim, Sang-Kyun, Eun-Hee Lee, and In-Joo Chin. "Specific interaction characteristics in organoclay nanocomposite of miscible poly(styrene-co-acrylonitrile) and poly(vinyl chloride) blend." Journal of Materials Research 23, no. 4 (2008): 1168–74. http://dx.doi.org/10.1557/jmr.2008.0148.

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We propose a new method for the preparation of the polymer/organoclay nanocomposite, termed the solution and melt mixing (SOAM) method, where the polymer and clays are first blended in solution, and subsequently the mixture is further blended in the melt. We prepared the ternary nanocomposite systems of poly(styrene-co-acrylonitrile) (SAN), poly(vinyl chloride) (PVC) and Cloisite25A clays (C25A) by solution blending as well as by the SOAM method. The C25A content in the nanocomposite was optimized by analyzing the x-ray diffraction (XRD) data of binary mixtures (SAN/C25A and PVC/C25A nanocompo
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Medeiros, Keila Machado, Taciana Regina de Gouveia Silva, Dayanne Diniz Souza Morais, Luana Rodrigues Kojuch, Edcleide Maria Araújo, and Hélio Lucena Lira. "Study of Morphology Membrane of Polymeric Nanocomposites Obtained by Phases Inversion." Materials Science Forum 775-776 (January 2014): 498–503. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.498.

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In this work, were obtained nanocomposite membranes polyamide66/Paraíba bentonite clay, treated with a quaternary ammonium salt in order to make it organophilic. The membranes were prepared as thin films using the technique of phase inversion from the nanocomposites obtained by solution. The membranes were characterized by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetry (TG) and scanning electron microscopy (SEM). By means of X-ray diffractogram, it was revealed that the membranes remained organically treated clay presented exfoliated and/or partially exfoli
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7

Nóbrega Medeiros, Vanessa, Thamyres Cardoso de Carvalho, Amanda Melissa Damião Leite, Edcleide Maria Araújo, Renê Anísio da Paz, and Hélio Lucena Lira. "Influence of Content and Treatment of Clay in the Morphology of PES Membranes." Materials Science Forum 869 (August 2016): 824–29. http://dx.doi.org/10.4028/www.scientific.net/msf.869.824.

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Polymeric membranes were produced from the nanocomposites of polyethersulfone and clay (untreated-MMT and treatment-OMMT), by phase inversion technique, in the proportions of 3 and 5% w/w, using as the solvent N, N dimethylformamide (DMF). From XRD results it was noted a change in the structure of the MMT by organophilization process with increase of the interplanar basal distance. To the membranes it was observed an exfoliated and/or partially exfoliated structure. From SEM images the nanocomposite membranes showed a surface apparently exempt of pores, however in the cross-section images show
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8

Nóbrega Medeiros, Vanessa, A. M. D. Leite, R. A. Paz, L. F. Maia, E. M. Araújo, and L. A. Pessan. "Morphological Comparison of PEI and PES Nanocomposite Membranes with Bentonite Clay." Materials Science Forum 775-776 (January 2014): 487–92. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.487.

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Obtaining membranes from polymer nanocomposites have attracted interest of researchers because they use low levels of charge for improvement in barrier properties. In this study, membranes from poly (imide ether) (PEI) and poly (sulfone ether) (PES) were produced by the solvent evaporation technique, using as solvent: chloroform to PEI and dimethylformamide (DMF) to PES; and the clay Brasgel PA was used as load. The results showed that, by XRD, PEI membranes have apparently a structure of micro-composites and / or interleaved structure. Those obtained with PES had an exfoliated structure and /
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9

Paramith, Tika, Johnner P Sitompul, and Hyung Woo Lee. "The effect of organobentonites from spent bleaching earth (SBE) and commercial bentonite on nanocomposite properties." International Journal of Engineering & Technology 7, no. 4 (2018): 2000. http://dx.doi.org/10.14419/ijet.v7i4.15317.

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This paper concerns on synthesis of nanocomposites consisting of Poly(lactic acid) (PLA) and clays. Two types of clays were regenerated organobentonite and commercial organobentonite. PLA and clays were melt extruded using single-screw extruder. The extruded compound was pelletized, then hot pressed using compression molding machine. Regenerated organobentonite was obtained from regeneration of spent bleaching earth (SBE) using solvent extraction and oxidation method. Afterwards, regenerated SBE modified by organic compound. While, commercial organobentonite was directly modified of commercial
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10

Cobos, Mónica, Iker De-La-Pinta, Guillermo Quindós, María Jesús Fernández, and María Dolores Fernández. "Synthesis, Physical, Mechanical and Antibacterial Properties of Nanocomposites Based on Poly(vinyl alcohol)/Graphene Oxide–Silver Nanoparticles." Polymers 12, no. 3 (2020): 723. http://dx.doi.org/10.3390/polym12030723.

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The design of new materials with antimicrobial properties has emerged in response to the need for preventing and controlling the growth of pathogenic microorganisms without the use of antibiotics. In this study, partially reduced graphene oxide decorated with silver nanoparticles (GO–AgNPs) was incorporated as a reinforcing filler with antibacterial properties to poly(vinyl alcohol) (PVA) for preparation of poly(vinyl alcohol)/graphene oxide-silver nanoparticles nanocomposites (PVA/GO–AgNPs). AgNPs, spherical in shape and with an average size of 3.1 nm, were uniformly anchored on the partially
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11

Paramitha, Tika, and Johnner P. Sitompul. "Karakterisasi Nanokomposit Poly(Lactic Acid)-Spent Bleaching Earth Regenerasi Termodifikasi." KOVALEN: Jurnal Riset Kimia 6, no. 2 (2020): 90–98. http://dx.doi.org/10.22487/kovalen.2020.v6.i2.15207.

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Development of renewable resource-based polymers attracts attention to solve environmental problems due to the build up of polymer (plastic). Poly(lactic acid) (PLA) is one of the most widely used polymers which have good biodegradability and processability. The addition of fillers to the PLA matrix aims to improve the characteristics of the PLA, such as mechanical properties of nanocomposites of PLA. Thus, PLA can be use as substitution of fossil fuel-based polymer. Spent Bleaching Earth (SBE) can be used as a filler after regeneration process. SBE was extracted and oxidized to take its oil c
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12

Nakanishi, Ko, Shuichi Yamagata, Tsukasa Akasaka, Shigeaki Abe, Yasuhiro Yoshida, and Junichiro Iida. "Preparation of a Poly(Lactic Acid)/Montmorillonite Nanocomposite." Key Engineering Materials 631 (November 2014): 151–55. http://dx.doi.org/10.4028/www.scientific.net/kem.631.151.

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Poly (L-lactic acid)/organically modified montmorillonite (PLLA/OMMT) nanocomposites were fabricated by a solution intercalation method. OMMT, modified with quaternary alkylammonium ion, was prepared by alkyltrialkoxysilane. The differential scanning calorimetry measurement revealed that the crystallization temperatures of PLLA/OMMT nanocomposites were at around 110 °C regardless of the existence of OMMT or the weight fraction of them. X-ray diffraction patterns suggested that the (001) diffraction was around 2θ = 2.5°. The TEM image showed variously expanded interlayer galleries of OMMT and p
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13

Di Pasquale, Giovanna, and Antonino Pollicino. "Properties of Polystyrene Clay Nanocomposites Prepared Using Two New Imidazolium Surfactants." Journal of Nanomaterials 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/2594958.

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Montmorillonite/polystyrene nanocomposites were prepared by in situ photopolymerization of styrene in the presence of 2% by weight of clay organomodified by two new imidazolium surfactants having in their structure an alkyl chain with 20 or 22 carbon atoms, respectively. Thermogravimetry showed that the new surfactants are more thermally stable than conventional alkylammonium surfactants. The properties of the obtained nanocomposites were compared with those of pristine polystyrene, with those of a microcomposite obtained by in situ polymerization of styrene in the presence of unmodified clay,
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14

Meneghetti, P., S. Shaikh, S. Qutubuddin, and S. Nazarenko. "Synthesis and Characterization of Styrene-Butadiene Rubber-Clay Nanocomposites with Enhanced Mechanical and Gas Barrier Properties." Rubber Chemistry and Technology 81, no. 5 (2008): 821–41. http://dx.doi.org/10.5254/1.3548234.

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Abstract Five styrene-butadiene rubber (SBR)/clay nanocomposite or hybrid systems were synthesized via mechanical mixing of SBR using a Brabender mixer and a 2-roll mill in the presence of unmodified sodium montmorillonite (Na-MMT) clay, MMT modified with octadecylamine (C18amine), MMT modified with a zwitterionic surfactant, octadecyldimethyl betaine (C18DMB), and MMT modified with a polymerizable cationic surfactant, vinylbenzyl octadecyldimethyl ammonium chloride (VODAC) or vinylbenzyl dodecyldimethyl ammonium chloride (VDAC). The surfactant chain length and functional groups affected the d
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15

Kharazmkia, M., G. Naderi, M. H. R. Ghoreishy, and S. Shokoohi. "ELASTOMER NANOCOMPOSITES BASED ON BR/EPDM/ORGANOCLAY." Rubber Chemistry and Technology 86, no. 2 (2013): 299–312. http://dx.doi.org/10.5254/rct.13.87975.

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ABSTRACT Elastomer nanocomposites based on BR, EPDM, and Cloisite 15A were prepared via melt compounding on a laboratory scale two-roll mill. Effect of BR/EPDM composition ratio (0/100, 75/25, 50/50, 25/75, and 100/0) and nanoclay content (3, 5, 7, and 10 w/w) on the microstructure, mechanical, and rheological properties of BR/EPDM/organoclay nanocomposites were studied. Cure characterization results of the prepared elastomer nanocomposites are indicative of the accelerative role of nanoclay in the vulcanization reaction of matrix elastomer chains. The remarkable increase observed in the torqu
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16

Howyan, Nashwa A., Layla A. Al Juhaiman, Waffa K. Mekhamer, and Hissah H. Altilasi. "Comparative Study of Protection Efficiency of C-Steel Using Polystyrene Clay Nanocomposite Coating Prepared from Commercial Indian Clay and Local Khulays Clay." Metals 13, no. 5 (2023): 879. http://dx.doi.org/10.3390/met13050879.

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This work aimed to compare the coating protection efficiency of C-steel using two kinds of clay: a local Khulays clay (RCKh) from Saudi Arabia and a commercial clay (CCIn) from India. Clay-based polymer nanocomposites have a unique layered structure, rich intercalation chemistry, and availability at low cost. They are promising reinforcements for polymers. The raw clay for both clay types was washed before being treated with NaCl to produce sodium clay (NaC). The cationic surfactant cetylpyridinium chloride (CPC) was then used to convert the NaC into the organoclay (OC) form. Polystyrene/organ
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17

Araújo, Edcleide Maria, Renê Anísio da Paz, Tomás Jefférson Alves de Mélo, Amanda Melissa Damião Leite, Renata Barbosa, and Edson Noriyuki Ito. "Use of Brazilian Clay in Nylon 6 with Different Molecular Weight Nanocomposites." Materials Science Forum 660-661 (October 2010): 777–83. http://dx.doi.org/10.4028/www.scientific.net/msf.660-661.777.

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The effect of nylon 6 (Ny6) molecular weight on the development of polymer/layered silicates nanocomposites prepared by the melt intercalation technique was studied in this work. The nylon6/organoclay nanocomposites were prepared in the counter-rotational twin screw extruder. The results of torque rheometry showed that the presence of organoclay in the nylon 6 increased the torque. The results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) showed exfoliated and/or partially exfoliated structures.
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18

Khezri, Khezrollah, Vahid Haddadi-Asl, Hossein Roghani-Mamaqani, and Mehdi Salami-Kalajahi. "Polystyrene–organoclay nanocomposites produced by in situ activators regenerated by electron transfer for atom transfer radical polymerization." Journal of Polymer Engineering 32, no. 4-5 (2012): 235–43. http://dx.doi.org/10.1515/polyeng-2012-0029.

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Abstract A newly developed initiation system, activators regenerated by electron transfer (ARGET), was employed to synthesize polystyrene-organoclay nanocomposites via atom transfer radical polymerization (ATRP). ARGET ATRP was applied since it is carried out at significantly low concentrations of the catalyst and environmentally acceptable reducing agents. Conversion and molecular weight evaluations were performed using gravimetry and size exclusion chromatography (SEC), respectively. According to the findings, addition of clay content resulted in a decrease in conversion and molecular weight
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19

Medeiros, Keila Machado, Vanessa Nóbrega Medeiros, Dayanne Diniz Souza Morais, Luana Rodrigues Kojuch, Edcleide Maria Araújo, and Hélio Lucena Lira. "Analysis of the Efficiency of Surface Treatment of Bentonite Clay for Application in Polymeric Membranes." Materials Science Forum 775-776 (January 2014): 493–97. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.493.

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The bentonite clay fillers are mostly used for the development of nanocomposites, due to having characteristics which provide to obtain in nanometric particles. The bentonite clay was treated with an ammonium quaternary salt to modify it to organophilic clay. The polymeric membranes and nanocomposites were prepared using the phase inversion technique. The bentonite and organophilic clays were characterized by X-ray fluorescence (XRF), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The membranes were characterized by XRD. The results of XRF, XRD and FTIR confirmed t
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da Paz, Renê Anísio, Edcleide Maria Araújo, Luiz Antonio Pessan, Tomás Jefférson Alves de Mélo, Amanda Melissa Damião Leite, and Vanessa Nóbrega Medeiros. "Influence of Molecular Weight of Polyamide 6 in Obtaining of Nanocomposites with National Organoclay." Materials Science Forum 727-728 (August 2012): 1711–16. http://dx.doi.org/10.4028/www.scientific.net/msf.727-728.1711.

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Much attention is being given to developing nanocomposites with layered silicates, owing to the great need for advanced materials engineering and the fact that the pure polymers do not present the behavior or properties needed for certain applications within that context, the objective of this study was to influence of the molecular weight of polyamide 6 in obtaining nanocomposites with national organoclay. For this, the mixture of polyamide 6/ organoclay was processed in a twin screw extruder, and then was characterized by thermogravimetry (TG), X-ray diffraction (XRD) and heat deflection tem
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Wang, Haitao, Xiangfu Meng, Zhongzhong Qian, et al. "Synthesis and Properties of Melamine-Formaldehyde/Montmorillonite Nanocomposites." Journal of Nanoscience and Nanotechnology 8, no. 4 (2008): 1775–81. http://dx.doi.org/10.1166/jnn.2008.18242.

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In this paper, intercalated and partially exfoliated melamine-formaldehyde (MF)/montmorillonite (MMT) nanocomposites have been synthesized successfully via in-situ polymerization based on pristine montmorillonite, acidified montmorillonite and organic modified montmorillonite respectively. The obtained nanocomposites were characterized by XRD, TEM, TGA, and Raman spectroscopy. Free formaldehyde content of those composites was also determined by acetyl acetone technique. It was found that acidified montmorillonite and organic modified montmorillonite could catalyze the polycondensation reaction
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22

Magaraphan, Rathanawan, Woothichai Thaijaroen, and Ratree Lim-ochakun. "Structure and Properties of Natural Rubber and Modified Montmorillonite Nanocomposites." Rubber Chemistry and Technology 76, no. 2 (2003): 406–18. http://dx.doi.org/10.5254/1.3547751.

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Abstract Montmorillonite clay was organically modified by primary and quaternary ammonium salts (having C12-C18). The modified clay was added to a solution of natural rubber in toluene at various contents. Characterization of the structure of the nanocomposites was performed by using x-ray diffraction and transmission electron microscope. The results showed that the silicate layers of the clay were expanded so that the exfoliated nanocomposites were obtained at clay content below 10 phr; above that the nanocomposites became partially exfoliated. Moreover, long primary amine showed more improve
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23

de Carvalho, Thamyres Cardoso, Erbertt Barros Bezerra, Renê Anísio da Paz, Amanda Melissa Damião Leite, Vanessa Nóbrega Medeiros, and Edcleide Maria Araújo. "Study of the Degradability of PA6/Organoclay Nanocomposites." Materials Science Forum 869 (August 2016): 288–92. http://dx.doi.org/10.4028/www.scientific.net/msf.869.288.

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The study of the degradability of PA6 / organoclay nanocomposites was evaluated to minimize the effects of plastic waste in the environment. The use of clays usually accelerates the degradation of nanocomposites. A regional clay (polyamide 6, Polyform - B300) and a quaternary ammonium salt (Cetremide (hexadecyltrimethyl ammonium bromide) were used. The hybrids were obtained in a co-rotating twin screw extruder and the tensile and the impact specimens were obtained through injection. The infrared spectroscopy (FTIR) and the X-ray diffraction (XRD) confirmed the presence of the salt molecules in
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24

Bao, S. P., and Sie Chin Tjong. "Fracture Characterization of High Density Polyethylene/Organoclay Nanocomposites Toughened with SEBS-g-MA." Key Engineering Materials 312 (June 2006): 187–92. http://dx.doi.org/10.4028/www.scientific.net/kem.312.187.

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High density polyethylene (HDPE)/organoclay nanocomposites toughened with maleated styrene-ethylene-butylene-styrene elastomer (SEBS-g-MA) were prepared by melt compounding. The structure and mechanical properties of such nanocomposites were investigated by X-ray diffraction (XRD), Fourier transform infrared spectrometry (FTIR), tensile and impact techiniques. XRD measurements showed that meleic anhydride group of SEBS elastomer was beneficial in forming an intercalated or partially exfoliated structure. The essential work of fracture (EWF) approach under tensile condition was used to characte
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25

Chen, Dazhu, Weian Zhang, and Pingsheng He. "Capillary Extrusion Rheology and Thermal Stability of EVA/Organomontmorillonite Nanocomposites." Polymers and Polymer Composites 13, no. 3 (2005): 271–80. http://dx.doi.org/10.1177/096739110501300307.

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Ethylene vinyl acetate (EVA) co-polymer-based nanocomposites based on organomontmorillonite (Org-MMT) (Nanolin DK) were prepared by melt compounding without any additional compatibiliser. A partially-intercalated partially-exfoliated structure was revealed in the nanocomposites by X-ray diffraction and transmission electron microscopy Attention was paid to the steady shear rheological properties of the nanocomposites via a capillary rheometer owing to the resemblance of its conditions of operation to those prevailing during the practical fabrication process of materials. Increasing the tempera
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Potphode, Darshna D., P. Sivaraman, Sarada P. Mishra, and Manoranjan Patri. "Polyaniline/partially exfoliated multi-walled carbon nanotubes based nanocomposites for supercapacitors." Electrochimica Acta 155 (February 2015): 402–10. http://dx.doi.org/10.1016/j.electacta.2014.12.126.

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da Silva, Emilene Rita Pimental, Ruben Jesus Sanchez Rodriguez, Flavio Costa Miguens, Djalma Souza, Sergio Neves Monteiro, and Veronica Scarpini Candido. "Nanocomposites Obtained by Montmorilonite Clay Additivation in P3 (HB-8%HV)." Materials Science Forum 775-776 (January 2014): 465–70. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.465.

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Modified montmorilonite additivated films of poly 3 (hydroxybutyrateco-8%-hydroxyvalerate) were formulated by solvent evaporation technique and then characterized by means of X-ray diffraction, scanning electron microscopy, atomic force microscopy and scanning differential calorimetry. A preliminary characterization using these analyses revealed the formation of nanocomposites with partially exfoliated and interlayered structures. These nanocamposites display changes in the crystalline structure of the precursor biodegradable polymer.
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dos Santos, Elaine, Marcus Fook, Oscar Malta, Suédina de Lima Silva, and Itamara Leite. "Role of Surfactants in the Properties of Poly(Ethylene Terephthalate)/Purified Clay Nanocomposites." Materials 11, no. 8 (2018): 1397. http://dx.doi.org/10.3390/ma11081397.

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Purified clay was modified with different amounts of alkyl ammonium and phosphonium salts and used as filler in the preparation of PET nanocomposites via melt intercalation. The effect of this type of filler on morphology and thermal and mechanical properties of PET nanocomposites was investigated by X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermogravimetric analyses (TG), tensile properties, and transmission electron microscopy (TEM). The results showed that the mixture of alkyl ammonium and phosphonium salts favored the production of PET nanocomposites with intercala
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Araújo, E. M., K. D. Araujo, R. A. Paz, T. R. Gouveia, R. Barbosa, and E. N. Ito. "Polyamide 66/Brazilian Clay Nanocomposites." Journal of Nanomaterials 2009 (2009): 1–5. http://dx.doi.org/10.1155/2009/136856.

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Polyamide 66 (PA66)/Brazilian clay nanocomposites were produced via direct melt intercalation. A montmorillonite sample from the Brazilian state of Paraíba was organically modified with esthearildimethylammonium chloride (Praepagen), quaternary ammonium salt and has been tested to be used in polymer nanocomposites. The dispersion analysis and the interlayer spacing of the clay particles in matrix were investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Thermal behavior of the obtained systems was investigated by differential scanning calorimetry (DSC), thermogra
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Teuku, Rihayat, and Amroel Suryani. "Morphology Properties of Polyurethane/Clay Nanocomposites Base on Palm Oil Polyol Paint." Advanced Materials Research 647 (January 2013): 701–4. http://dx.doi.org/10.4028/www.scientific.net/amr.647.701.

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An organically modified clay and a pristine clay were used to prepare biodegradable thermoplastic polyurethane (PU) paint/clay nanocomposites. In this paper, polyurethane paint /clay nanocomposites base on palm oil polyol were prepared by isocyanate, polyol and organoclay (a clay modified with Cetyl trimethyl ammonium Bromide (CTAB) and Octadecylamines (ODA). The morphologies of samples were revealed by transmission electron microscopy (TEM) and Intercalation of PU into clay galleries and crystalline structure of PU were investigated using X-ray diffraction (XRD). The morphology of the resulti
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Lin, Sheng-Hsiang, Hsiang-Ting Wang, Jie-Mao Wang, and Tzong-Ming Wu. "Enzymatic Degradation of Acrylic Acid-Grafted Poly(butylene succinate-co-terephthalate) Nanocomposites Fabricated Using Heat Pressing and Freeze-Drying Techniques." Materials 13, no. 2 (2020): 376. http://dx.doi.org/10.3390/ma13020376.

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Biodegradable acrylic acid-grafted poly(butylene succinate-co-terephthalate) (g-PBST)/organically modified layered zinc phenylphosphonate (m-PPZn) nanocomposites were effectively fabricated containing covalent bonds between the g-PBST and m-PPZn. The results of wide-angle X-ray diffraction and transmission electron microscopy revealed that the morphology of the g-PBST/m-PPZn nanocomposites contained a mixture of partially exfoliated or intercalated conformations. The isothermal crystallization behavior of the nanocomposites showed that the half-time for crystallization of 5 wt % g-PBST/m-PPZn
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Acharya, H., S. K. Srivastava, and Anil K. Bhowmick. "Synthesis of partially exfoliated EPDM/LDH nanocomposites by solution intercalation: Structural characterization and properties." Composites Science and Technology 67, no. 13 (2007): 2807–16. http://dx.doi.org/10.1016/j.compscitech.2007.01.030.

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33

Eesaee, Mostafa, Eric David, Nicole R. Demarquette, and Davide Fabiani. "Electrical Breakdown Properties of Clay-Based LDPE Blends and Nanocomposites." Journal of Nanomaterials 2018 (2018): 1–17. http://dx.doi.org/10.1155/2018/7921725.

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Microstructure and electrical breakdown properties of blends and nanocomposites based on low-density polyethylene (LDPE) have been discussed. A series of LDPE nanocomposites containing different amount of organomodified montmorillonite (clay) with and without compatibilizer have been prepared by means of melt compounding. Two sets of blends of LDPE with two grades of Styrene-Ethylene-Butylene-Styrene block copolymers have been prepared to form cocontinuous structure and host the nanoreinforcement. A high degree of dispersion of oriented clay was observed through X-ray diffraction, scanning, an
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34

Derdar, Hodhaifa, Geoffey Robert Mitchell, Sarra Chaibedraa, et al. "Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method." Polymers 14, no. 14 (2022): 2820. http://dx.doi.org/10.3390/polym14142820.

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In the present work, we report a simple synthesis method for preparation of copolymers and nanocomposites from limonene and styrene using clay as a catalyst. The copolymerization reaction is carried out by using a proton exchanged clay as a catalyst called Mag-H+. The effect of temperature, reaction time and amount of catalyst were studied, and the obtained copolymer structure (lim-co-sty) is characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (1H-NMR) and differential scanning calorimetry (DSC). The molecular weight of the obtained copolym
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35

Pichaimani, Prabunathan, Hariharan Arumugam, Dineshkumar Gopalakrishnan, Balaji Krishnasam та Alagar Muthukaruppan. "Partially Exfoliated α-ZrP Reinforced Unsaturated Polyester Nanocomposites by Simultaneous Co-polymerization and Brønsted Acid–Base Strategy". Journal of Inorganic and Organometallic Polymers and Materials 30, № 10 (2020): 4095–105. http://dx.doi.org/10.1007/s10904-020-01558-x.

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36

Tulsyan, Kunal, Saurabh Toshniwal, Gowri Dorairaju, Daniel F. Schmidt, and Emmanuelle Reynaud. "Thermomechanical Assessment of Plastic Deformation in Model Amorphous Polyamide/Clay Nanocomposites." Journal of Nanomaterials 2010 (2010): 1–8. http://dx.doi.org/10.1155/2010/679786.

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In an effort to isolate the role of nanofiller independent of changes in polymer microstructure, we report the processing and characterization of model amorphous polyamide/clay nanocomposites. Analyses confirm fully amorphous character, no change inTgor thermal stability, and a partially exfoliated structure. The tensile modulus, yield stress, and failure stress increase with the clay content, both in dried and conditioned samples. In contrast, failure strain decreases with increasing clay content in conditioned samples but is independent of clay content in dried samples. Concurrently, the con
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Ganter, Markus, Wolfram Gronski, Peter Reichert, and Rolf Mülhaupt. "Rubber Nanocomposites: Morphology and Mechanical Properties of BR and SBR Vulcanizates Reinforced by Organophilic Layered Silicates." Rubber Chemistry and Technology 74, no. 2 (2001): 221–35. http://dx.doi.org/10.5254/1.3544946.

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Abstract Rubber compounds based on butadiene rubber (BR) or styrene—butadiene rubber (SBR) containing organophilic layered silicates were prepared. Organophilic silicates were swollen in a rubber/toluene solution. Matrix—filler reactive bonding was performed by adding bis(triethoxysilylpropyl)-tetrasulfan (TESPT) during swelling. Excellent dispersion of organoclay nanofillers in rubber matrices was demonstrated by transmission electron microscopy (TEM) and atomic force microscopy (AFM) exhibiting intercalated and partially exfoliated silicate layers. Matrix—filler interfacial coupling by TESPT
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Bindu Sharmila, T. K., E. P. Ayswarya, Beena T. Abraham, P. M. Sabura Begum, and Eby Thomas Thachil. "Fabrication of partially exfoliated and disordered intercalated cloisite epoxy nanocomposites via in situ polymerization: Mechanical, dynamic mechanical, thermal and barrier properties." Applied Clay Science 102 (December 2014): 220–30. http://dx.doi.org/10.1016/j.clay.2014.09.043.

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39

Magaletti, Federica, Gea Prioglio, Ulrich Giese, Vincenzina Barbera, and Maurizio Galimberti. "Hexagonal Boron Nitride as Filler for Silica-Based Elastomer Nanocomposites." Nanomaterials 14, no. 1 (2023): 30. http://dx.doi.org/10.3390/nano14010030.

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Two-dimensional hexagonal boron nitride (hBN) has attracted tremendous attention over the last few years, thanks to its stable structure and its outstanding properties, such as mechanical strength, thermal conductivity, electrical insulation, and lubricant behavior. This work demonstrates that hBN can also improve the rheological and mechanical properties of elastomer composites when used to partially replace silica. In this work, commercially available pristine hBN (hBN-p) was exfoliated and ball-mill treated in air for different durations (2.5, 5, and 10 h milling). Functionalization occurre
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40

Wang, Kui, Rodrigue Matadi Boumbimba, Nadia Bahlouli, Saïd Ahzi, René Muller, and Michel Bouquey. "Dynamic Compressive Behavior of a Melt Mixed Polypropylene/Organoclay Nanocomposites." Journal of Engineering Materials and Technology 134, no. 1 (2011). http://dx.doi.org/10.1115/1.4005420.

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This work aims to investigate the dynamic behavior of polypropylene organoclay nanocomposites. The nanocomposite was obtained by mixing the polypropylene matrix with a masterbatch of polypropylene modified anhydride maleic and montmorillonite organoclay (pp-nanocor). The dynamic behavior was investigated by using split Hopkinson pressure bars, at different strain rates and different temperatures. The obtained nanocomposite exhibits a good dispersion and a partially exfoliated morphology. To study the effect of nanocomposite dispersion and morphology on the dynamic behavior, another nanocomposi
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Balakrishnan, S., and D. Raghavan. "Mechanical Properties of Chemically Functionalized Clay Vinyl Ester Nanocomposites." MRS Proceedings 791 (2003). http://dx.doi.org/10.1557/proc-791-q8.13.

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ABSTRACTThis study focuses on the role of chemistry of onium salt(s) used in functionalizing clay and the processing conditions in achieving exfoliated clay vinyl ester nanocomposites. Two different clay treatments were added to vinyl ester resin and three different processing conditions were examined in the formulation of nanocomposite. Through this study, we demonstrate that the degree of exfoliation and dispersion of layered silicate nanocomposite is affected by both processing and the clay chemical treatment. At an organoclay loading of only 3.5wt%, the modulus improved by 20% in partially
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Thi, Nhung Hac, Toan Van Hoang, Truong Cong Doanh, et al. "Two‐step preparation of phosphorus‐containing organoclay and its effect on fire‐resistant and mechanical properties of the flame‐retardant polyethylene composite." Journal of Applied Polymer Science, May 25, 2024. http://dx.doi.org/10.1002/app.55758.

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AbstractIn this study, a nanohybrid based on montmorillonite (oMMT2) was prepared through a two‐step method using Arquad MCB‐80 and 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide (DOPO) as intercalation agents. The nanohybrid exhibited a basal spacing of 31.5 Å, which contained approximately 12.3% of Arquad MCB‐80 and 31.6% of DOPO. Various amount of oMMT2 nanohybrid was incorporated into a flame‐retardant polyethylene system containing aluminum trihydroxide and red phosphorus with a constant total additive content of 20 wt%. The dispersibility of oMMT2 in the composite matrix was evaluate
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González-Castillo, Eduin I., Yadir Torres, Francisco J. González, et al. "Thermal and tribo-mechanical properties of high-performance poly(etheretherketone)/reduced graphene oxide nanocomposite coatings prepared by electrophoretic deposition." Journal of Materials Science, June 19, 2023. http://dx.doi.org/10.1007/s10853-023-08686-y.

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AbstractThe thermal stability and degradation, near-to-surface mechanical properties, and scratch resistance and damage mechanism of poly(etheretherketone) (PEEK)/reduced graphene oxide (RGO) nanocomposite coatings are analyzed and discussed in terms of their nanosheet content and microstructure. Although RGO modified the thermal stability and degradation of the polymeric matrix, for instance, by slightly reducing the onset degradation temperature, its addition was not a limiting factor in the PEEK processing. Respecting the microstructural features induced by the nanosheets, the nanocomposite
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44

Yousefzadeh, Hajar, Abolhassan Noori, Mohammad S. Rahmanifar, et al. "Partial Sulfidation of the Electrochemically Exfoliated Layered Double Hydroxides toward Advanced Aqueous Zinc Batteries." Advanced Energy Materials, September 24, 2023. http://dx.doi.org/10.1002/aenm.202302137.

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AbstractAqueous zinc‐based batteries are a promising alternative to lithium batteries. These batteries, however, persistently suffer from uncontrollable dendrite growth and sustained water consumption at the Zn anodes, along with low and often fading capacity at the cathodes. Herein, Zn metal is simply encapsulated into a chitosan‐containing polymer gel that not only suppresses hydrogen evolution but also enables dendrite‐free Zn plating/stripping. A binder‐free cathode based on the electrochemically exfoliated and partially sulfidated Ni–Co–Fe layered double hydroxide‐reduced graphene oxide (
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45

Wang, Yeh, Syh-W. Huang, and Jiang-Y. Guo. "The state of clay dispersion in maleated polypropylene /organoclay nanocomposites via dielectric spectroscopy measurements." e-Polymers 8, no. 1 (2008). http://dx.doi.org/10.1515/epoly.2008.8.1.881.

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AbstractDielectric spectroscopy is a powerful method that allows the study of dynamics of polymers in a wide frequency range. In this work, the state of clay dispersion was related to the dielectric properties of the polymer nanocomposites based on organoclay filled maleated polypropylene (PPgMA). Fully and partially exfoliated samples were prepared through powered sonication and melt blending, respectively. Though two mechanical relaxations were revealed from dynamical mechanical analysis (DMA), only a single high-temperature process resulting from interfacial polarization was observed in bro
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46

Inceoglu, A. Baran, and Ulku Yilmazer. "Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites." MRS Proceedings 703 (2001). http://dx.doi.org/10.1557/proc-703-v9.23.

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ABSTRACTNanocomposites composed of unsaturated polyester matrix and organically modified clay filler were prepared. After the synthesis, XRD patterns showed that the interlayer spacing expanded from 1.25 nm to 4.5 nm. The mechanical properties of the nanocomposites were determined and it was found that adding only 3 w/w % organically modified clay improved the flexural modulus of unsaturated polyester by 35%. From DSC diagrams, it was found that Tgvalues of the nanocomposites also increased with the clay content. It is concluded that partially exfoliated / intercalated nanocomposites were form
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47

Wang, Yeh, and Wei-C. Chen. "Effect of clay modification on the dynamic mechanical and dielectric properties of PMMA nanocomposites via melt blending." e-Polymers 12, no. 1 (2012). http://dx.doi.org/10.1515/epoly.2012.12.1.128.

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AbstractThe dynamic mechanical and dielectric properties of poly(methyl methacrylate)/ clay nanocomposites (PCNs) prepared with melt blending was studied in terms of clay modification and nanoscale dispersion. The pristine clay was modified via various routes, including PMMA concentrates from in situ polymerization and POP-diamine intercalation. Partially exfoliated clay layers were uniformly dispersed in the nanocomposites as evidenced from x-ray diffraction study. The subglass β relaxation, the segmental α relaxation, and the α β-merging process above Tg were observed in the nanocomposites f
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48

MORITA, REINALDO Y., JULIANA R. KLOSS, MARIA IZABEL X. SCAPOLAN, RONILSON V. BARBOSA, and ANA LÚCIA N. DA SILVA. "Evaluation of using poly(ethylene-co-vinyl acetate)/organoclays nanocomposites in blown film production." Anais da Academia Brasileira de Ciências 97, no. 1 (2025). https://doi.org/10.1590/0001-3765202520230781.

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Abstract Poly(ethylene-co-vinyl acetate)/organoclay (EVA/OC) systems were prepared by melt mixing in a twin-screw extruder. The potential application of the nanocomposites in the production of blow molding films was analyzed by mechanical, thermal, morphological, X-ray diffraction, water vapor permeability and rheological properties. A modified organoclay (OC) with a non-ionic surfactant, free of ammonium salt (Vulgel-AM), and an organoclay modified with cetyltrimethylammonium bromide (Vulgel-CT) were added in EVA matrix (1.5 wt%). The X-ray diffraction (XRD) showed that EVA/Vulgel-AM presente
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