Polyamide 66/Clay Nanocomposites via Melt Intercalation

Liu, Xiaohui; Wu, Qiuju

doi:10.1002/1439-2054(20020301)287:3<180::aid-mame180>3.0.co;2-t

Cited by 107 publications

(70 citation statements)

References 38 publications

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“…In an exfoliated structure, the individual silicate layers are fully separated and uniformly dispersed in the polymer matrix. The nanocomposites based on layered-silicate clay with intercalated and exfoliated structures are desirable, which have been shown to have improved strength and modulus [10][11][12][13][14][15][16][17][18], decreased gas and water permeability [10,13], and increased thermal stability and flame resistance [9,11,13]. The better properties of the nanocomposites are attributed to the high aspect ratio and large surface area of the layered silicates, and the strong interactions between the polymer chains and layered silicates.…”

Section: Introductionmentioning

confidence: 99%

“…PA66 is an important engineering plastic with high performance and the addition of clay is thought to strengthen the polymer matrix and create new materials with even better properties. There have been several studies on melt processing of nylon 66 (PA66) and clay nanocomposites [including [12][13][14][15][16][17][18][19][20][21][22]. However, like many other polymer/clay systems, studies on PA66/clay nanocomposites have focused on the final composite's morphological [12,13,15,16,[19][20], thermal [12-14, 16, 18, 19, 21, 22], and mechanical properties [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Nylon 66/clay nanocomposite structure development in a twin screw extruder

Lin

Thümen

Heim

et al. 2009

Polymer Engineering & Sci

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Nylon 66/clay nanocomposites were prepared in a Berstorff ZE25A UTX Ultra-glide corotating twin screw extruder at 2708C. Two types of extruder configurations with different mixing sections were used. One comprised two kneading block sections in the screws (KB only) and the other had a combination of a multiprocess-element (MPE) section and a kneading block section. Samples at eight different locations along the extruder screw were obtained and analyzed using scanning electron microscope and transmission electron microscope to examine the morphology development of clay inside nylon down the length of the extruder. It is found that the clay aggregates are quickly broken into smaller tactoids (micron size) and then even much smaller clay bundles (nanometer size) and single clay platelets in the first mixing section. The structure changes in the second mixing section are much less significant. X-ray diffraction (XRD) analysis of the nanocomposite products showed small, or disappearance of, characteristic XRD (001) peaks, which indicates partial exfoliation, or complete exfoliation,

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nylon 66/clay nanocomposite structure development in a twin screw extruder

Lin

Thümen

Heim

et al. 2009

Polymer Engineering & Sci

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“…We established that the mass flow rate for the organobentonite-filled nylon is significantly lower, while the modification has also a positive effect on other physical characteristics of the material. Several descriptions of the influence of organobentonite clay on the mechanical properties of nylon 6 can be found in the literature [21,22], or other nano-fillers (nano-CaCO 3 ) on the milling properties of polyamide [23], but there is no information on how it affects the laser machining of these composites.…”

Section: Introductionmentioning

confidence: 99%

The influence of organobentonite clay on CO2 laser grooving of nylon 6 composites

Antończak

Nowak

Szustakiewicz

et al. 2013

Int J Adv Manuf Technol

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The popular polycaprolactam (polyamide PA6), commonly referred to as nylon 6, widely used as a construction plastic, is not a typical material for micromachining by CO 2 laser vaporization. In this paper, we describe investigations of the pulsed CO 2 laser grooving of both the chemically pure and the organobentonite clay modified nylon 6. Our results indicate that doping of nylon 6 with nanoparticles of organophilized bentonite significantly improves the grooving ability, predictability of the process, and its quality. In order to determine the nature of the changes in the depth and width of the grooves as a function of the laser process parameters, theoretical modeling of the laser grooving of nylon was carried out. The basic parameters of the laser grooving process versus laser beam intensity, pulse repetition rate, scanning speed of the material and various compositions of the organophilized bentonite dopant are presented. Additionally, an example of a three-dimensional engraving/milling of tested materials as well as the impact of doping on the channel profile are examined. The modification of nylon 6 by appropriate doping with bentonite clay radically improves the quality of micromachining with a CO 2 laser.

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“…Regarding toughness or impact resistance of the material, in general, the addition of an organically modified layered silicate to a polymer matrix results in little or no change in toughness upon clay intercalation/exfoliation 167,168 . For example, Liu X et al reported that while the tensile strength and modulus of PP nanocomposites increased rapidly with increasing clay content from 0 to 5 wt.-%, the notched Izod impact strength was constant, within experimental error, in the clay content range between 0 and 7 wt.-% 167 .…”

Section: Mechanical Properties Of Nanocompositesmentioning

confidence: 85%

“…For example, Liu X et al reported that while the tensile strength and modulus of PP nanocomposites increased rapidly with increasing clay content from 0 to 5 wt.-%, the notched Izod impact strength was constant, within experimental error, in the clay content range between 0 and 7 wt.-% 167 . In fact, toughness improvements upon good clay dispersion have also been reported 25,169 .…”

Section: Mechanical Properties Of Nanocompositesmentioning

confidence: 99%

Development and characterization of novel nanobiocomposites containing various nanofillers to improve barrier and other physical properties of interest in food packaging and coating applications

Sánchez¹,

Dolores²

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CERTIFICAQue la presente memoria "Desarrollo y caracterización de nuevos nanobiocompuestos con propiedades barrera mejoradas de interés en aplicaciones de envasado alimentario y recubrimientos." constituye la tesis doctoral europea de Dña. Mª Dolores Sánchez García. Asimismo, certifica haber dirigido y supervisado tanto los distintos aspectos del trabajo como su redacción Y para que conste a los efectos oportunos, firma la presente en Valencia a Enero de 2011 Fdo. José María LagarónDedico este trabajo a Mis padres y hermano, por su apoyo. Mi marido Miguel, por su comprensión. A nuestro futuro hijo, Miguel."Nuestra recompensa se encuentra en el esfuerzo y no en el resultado. Un esfuerzo total es una victoria completa." Mahatma Gandhi AGRADECIMIENTOSEstos casi cinco últimos años han sido para mí unos de los más importantes, intensos y asombrosos de mi trayectoria tanto profesional como personal.En este tiempo he tenido la enorme suerte y satisfacción de conocer, aprender y trabajar con una persona que realmente admiro, mi director de tesis, Chema. Conocí a Chema con sólo 23 años, y durante estos 5 años, cada día que ha pasado me ha enseñado y transmitido toda su pasión, entusiasmo, motivación y entrega por la investigación. Ha sido un gran maestro, ejemplo y un gran hombre al que le estoy profundamente agradecida por todo lo que he aprendido a su lado, no sólo a nivel profesional sino también personal.Durante esta etapa también he tenido la suerte de conocer a otras personas, que me han apoyado, ayudado y a las que también les doy las gracias por haber estado a mi lado. Me gustaría hacer una especial mención de agradecimiento para las siguientes compis, gracias Ajo por ser como eres, por tu gran corazón; a mi niña Patri por estar aconsejándome y ayudándome en todo momento; a mi cuqui (Sergi) por compartir codo con codo todo el trabajo, por nuestras risas y bueno momentos; a Amparín por sus consejos y su entusiasmo en todo lo que hace (también a su nene Marcos); a Antonio por sus charlas psicológicas; a Zipi y Zape (Marta y Merche) por sus risas y su buen rollo; a mis niñas Cari (Carol) y Graci, por nuestras risas en el oxtran y nuestros saludos todas las mañanas; a nuestro sueco David, por esos cuatro meses intensos; a toda la gente de Castellón de la UJI (LLuisot, Pilarín, etc…).A todas mis compis de NBM, a mi niña Sabi, por ser tan especial…a mi cuqui Merche, que vuelvo a nombrar, por su alegría y su optimismo, a María por su motivación y exigencia en el trabajo, a Eugenia en especial por su compresión, apoyo y paciencia en todo momento, así como el resto de chicas NBM: a Pilar, por su agradable acogida; a Rosa, por sus ganas de ayudar, a Sandra, Amina, Cristina y Abi.A toda la gente que he conocido durante mi estancia en Estocolmo; a Mikael por acogerme en su grupo de trabajo, al resto de compis y sobre todo a mis chicos suecos Fran y Steve, Mathew, a Julieta y Joakim, a Rosana y Gonzalo.Así como la gente que conocí en mi estancia en Montreal, al Dr. Hoa por acogerme también en su grupo y por todo el trabajo qu...

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Polyamide 66/Clay Nanocomposites via Melt Intercalation

Cited by 107 publications

References 38 publications

Nylon 66/clay nanocomposite structure development in a twin screw extruder

Nylon 66/clay nanocomposite structure development in a twin screw extruder

The influence of organobentonite clay on CO2 laser grooving of nylon 6 composites

Development and characterization of novel nanobiocomposites containing various nanofillers to improve barrier and other physical properties of interest in food packaging and coating applications

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