Efeito do Co-Intercalante CIS-13-Docosenamida na Morfologia e Propriedades Mecânicas de compósitos Polipropileno/Argila Organofílica

Alves, Tatianny Soares; Barbosa, Renata; Angrizani, Clarissa Coussirat; Coutinho, Maria Goretti Ferreira; Carvalho, Laura H.; Canedo, Eduardo L.

doi:10.4322/polimeros.2013.011

Cited by 6 publications

(11 citation statements)

References 16 publications

(18 reference statements)

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“…The angle changed from 7.1°, related to the clay, to 4.24°, related to the nanocomposite, increasing the basal interplanar distance from 1.24 nm to 2.08 nm, corresponding to an increase of 67.74%, indicating a possible intercalation of the polymer in the clay layers, but without disruption of this structure. Furthermore, for this system, it was possible to observe the presence of a shoulder between 6° and 7° which was also obtained by Alves et al …”

Section: Resultssupporting

confidence: 86%

“…Cis‐13‐docosenamide (molecular formula C 22 H 43 NO, molar mass M = 337.6 g/mol), more commonly known as erucamide and trade name Armoslip E Powder, provided by Convip, it is widely used in the polymer processing industry as slip and release agent. In the present study, the erucamide was used as cointercalant, according to studies taken by Ratnayake, Haworth and Hourston and Alves et al …”

Section: Methodsmentioning

confidence: 99%

“…From the concentrates obtained with the internal mixer, four basic formulations were prepared by diluting the masterbatch in the polypropylene matrix, with percentages of PP, clay, compatibilizer and cointercalant as listed in Table . These concentrations were reasoned mainly on the work of Alves et al . and Silva Neto…”

Section: Methodsmentioning

confidence: 99%

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Effect of Cis‐13‐docosenamide in the Properties of Compatibilized Polypropylene/Clay Nanocomposites

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Alves

Barbosa

et al. 2016

Macromolecular Symposia

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The importance of obtaining materials with better properties than the pure polymer is increasing worldwide. A strategy often used to obtain better properties is the use of reinforcing fillers in the nanoscale. In this paper, polypropylene (PP) and organophilic montmorillonite (OMMT) nanocomposites were prepared, using maleic anhydride grafted polypropylene (PP-g-MA) as compatibilizer in concentrations of 3%, 5%, 15% and 22.5% and erucamide as cointercalant in concentrations of 0.3%, 0.5%, 1% and 1.5%. The nanocomposites were prepared by the melt intercalation method with a single screw extruder. The influence of the concentration of the compatibilizer and the cointercalant on morphological and mechanical properties of the materials were examined by X-ray diffraction, tensile test and Fourier transform infrared. The XRD results showed that the level of intercalation and/or exfoliation rises with the increase of additive concentrations, best outcomes were obtained from systems with smaller and greater percentages of clay, compatibilizer and cointercalant. The mechanical tests did not show significant rises when the concentration of PP-g-MA and erucamide increased. From the FTIR results, characteristic bands of the material and its possible interactions and intercalations were observed.

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Section: Resultssupporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%

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Effect of Cis‐13‐docosenamide in the Properties of Compatibilized Polypropylene/Clay Nanocomposites

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Alves

Barbosa

et al. 2016

Macromolecular Symposia

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“…It is believed that in PCL/Clay compounds the added particles can act as stress concentrators preventing the proper energy dissipation mechanisms thus reducing the impact strength. [40][41][42] Figure 7 shows SEM images of neat PCL with evidence of extensive roughness characterizing ductile fracture with elastic and plastic deformation, thus providing fracture with high energy absorption, results that agree with those presented for maximum elongation in Table 2. Figures 8 and 9 present SEM images for PCL/CLNa and PCL/MMT, respectively.…”

Section: Differential Scanning Calorimetry (Dsc)supporting

confidence: 78%

Biodegradable Compounds of Poly (Ɛ-Caprolactone)/Montmorillonite Clays

et al. 2019

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Biodegradable Poly (ɛ-caprolactone) (PCL) was compounded with Brasgel PA (MMT) and Cloisite Na (CLNa), and compatibilized with maleic anhydride grafted poly(ɛ-caprolactone) (PCL-g-MA). No evidence of degradation was verified during processing, as well as particle aggregates were absent as displayed through scanning electron microscopy (SEM) images. Compatibilized compounds upon clay addition achieved higher thermal stability as visualized by thermogravimetry (TG). Montmorillonite clays acted as nucleant agent during PCL melt crystallization as evidenced by differential scanning calorimetry (DSC). Mechanical behavior of PCL was preserved, and all compounds presented Elongation higher than 350% meanwhile the heat distortion temperature (HDT) was increased by 20% in PCL compounds, which may have wider range of application and better performance.

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“…A cis-13-docosenamida (erucamida), de nome comercial Armoslip E Powder, fornecida pela AkzoNobel, foi utilizada como agente co-intercalante. A erucamida é amplamente utilizada na indústria de processamento de polímeros como lubrificante; no presente estudo foi utilizada como cointercalante, de acordo com estudos realizados por Ratnayake et al [12] e Alves et al [13] .…”

Section: Materiaisunclassified

Inflamabilidade de Nanocompósitos de Polipropileno/Argila Organofílica

Alves¹,

Barbosa²,

Carvalho³

et al. 2014

Polímeros

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Resumo: A inflamabilidade de nanocompósitos com três tipos de polipropileno (homo e copolímeros) contendo 5% de argila montmorilonita organofílica (Cloisite 20A), 5 e 15% de polipropileno enxertado com anidrido maleico como agente compatibilizante e 0, 0,5 e 1% de cis-13-docosenamida (Erucamida) como agente co-intercalante foi estudada através do teste de queima horizontal UL94HB. Concentrados foram preparados em misturador interno e diluídos com a matriz de polipropileno em extrusora de dupla rosca corrotacional com diferentes configurações de rosca e velocidades rotação de 240 e 480 rpm. Os resultados indicaram aumento da velocidade de queima dos compósitos quando comparados às das matrizes e que a velocidade de queima não foi afetada pelas condições de processamento. Em todos os casos, foi observado durante o ensaio uma redução da emissão de fumaça, ausência de gotejamento de material e a formação de uma camada carbonácea, levando à preservação da estrutura interna da amostra. Palavras-chave: Polipropileno, compósitos, processamento, inflamabilidade. Flammability of Polypropylene/Organoclay NanocompositesAbstract: The flammabilities of nanocomposites made with three polypropylene grades (homo and copolymers) with 5 wt % of organoclay (Cloisite 20A), 5 or 15 wt % of maleated polypropylene as compatibilizer, and 0, 0.5 or 1 wt % of cis-13-docosenamide (Erucamide) as co-intercalant, were studied using the horizontal burning test UL94HB. Masterbatches prepared in an internal mixer were diluted in the polypropylene matrix using a corotating twin-screw extruder, with different screw configurations and operating at 240 or 480 rpm. Results indicate that the high burning rate of the composites was not affected by the processing conditions. For all formulations was observed a significant reduction in smoke release, lack of dripping and the formation of a char surface layer, that protected the core of the samples. Keywords: Polypropylene, nanocomposites, processing, flammability. IntroduçãoOs polímeros têm muitas aplicações na construção civil e nas indústrias de transporte terrestre e aéreo onde o comportamento de materiais expostos ao fogo é crucial, tanto para a segurança pessoal, quanto para as propriedades dos materiais [1] . Como a maioria dos produtos orgânicos, os polímeros são inflamáveis e durante o aquecimento há a liberação de pequenas moléculas que atuam como combustíveis em presença do fogo [2] . Em algumas aplicações, evitar a combustão é fundamental, o que tem incentivado o desenvolvimento de formulações capazes de retardar a combustão e a velocidade de propagação da chama (reduzindo a probabilidade de combustão durante a fase de iniciação do fogo) e/ou reduzir a emissão de fumaça. Pelas crescentes exigências das normas de segurança, em algumas aplicações, a inflamabilidade é uma das barreiras de utilização de alguns polímeros [3] . Resistência ao fogo, retardamento de chama ou características autoextinguíveis podem ser definidas como uma baixa velocidade de queima quando em contato com a fonte de calor ...

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Efeito do Co-Intercalante CIS-13-Docosenamida na Morfologia e Propriedades Mecânicas de compósitos Polipropileno/Argila Organofílica

Cited by 6 publications

References 16 publications

Effect of Cis‐13‐docosenamide in the Properties of Compatibilized Polypropylene/Clay Nanocomposites

Effect of Cis‐13‐docosenamide in the Properties of Compatibilized Polypropylene/Clay Nanocomposites

Biodegradable Compounds of Poly (Ɛ-Caprolactone)/Montmorillonite Clays

Inflamabilidade de Nanocompósitos de Polipropileno/Argila Organofílica

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