The thermal and crystallisation studies of short sisal fibre reinforced polypropylene composites

Joseph, P. V.; Joseph, Kuruvilla; Thomas, Sabu; Pillai, C. K. S.; Prasad, Virendra; Groeninckx, Gabriël; Sarkissova, Mariana

doi:10.1016/s1359-835x(02)00185-9

Cited by 474 publications

(297 citation statements)

References 27 publications

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“…Eco-friendly and low cost considerations have set the momentum for material science researchers to identify green materials that give low pollutant indexes 4 Vegetable fiber reinforced polymer composite materials have been increasingly accepted for use in the construction and automotive industry because they combine advantages of both the fibers and the thermoplastic matrix 9 Such advantages include low cost, good thermal and acoustical insulation properties, availability, CO 2 sequestration enhanced energy recovery, reduced dermal and respiratory irritation, and reduced tool wear in machining operations 10 Indeed, fiber incorporation into a polymer is known to cause substantial changes in the mechanical properties of composites 11 The problem with combining vegetable fibers or lignocellulosic materials with a thermoplastic is their incompatibility 12 Incompatibility has been associated with the polar nature of the fibers and the interaction with the non-polar matrix. These problems are usually reduced by properly modifying the interface, which can alter the fiber surface 13 .…”

Section: Introductionmentioning

confidence: 99%

Polypropylene Composites Reinforced with Biodegraded Sugarcane Bagasse Fibers: Static and Dynamic Mechanical Properties

et al. 2016

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The present work aimed to study sugarcane bagasse fibers pre-treated with fungi and using NaOH/ anthraquinone (AQ) in chemical pulping processes for applications in composite materials. Bagasse was decayed with 250 mg of Ceriporiopsis subvermispora inoculum in a 20 L bioreactor. After that, samples were submitted to similar conditions of decaying without inoculum charge. Decayed and undecayed fibers were treated with NaOH 12.5 wt%, 0.15 of AQ and a 12:1 (v/w) liquor:bagasse ratio at 160°C. Then, all obtained fibers were characterized according to their chemical composition. Dried biotreated (decayed) and control (undecayed) fibers were mixed through an extruder process with polypropylene. Later, composite granulates were injected directly in mold with cavities for tensile, flexural and shear tests. Composite materials with 10 and 20 wt% fibers were submitted to static mechanical standard tests and DMA (Dynamic Mechanical Analysis) to evaluate the effect of biotreatment. Biotreatment, cook time (pulping), and fiber content contributed to improvements in the mechanical properties of the composites. The interface between fiber and matrix was increased with the biotreatment and pulping of fibers. Furthermore, DMA results also showed that fiber incorporation into PP improved the modulus, mainly for biotreated fibers/PP composites. The T g (tan δ data) from composites was dislocated at lower temperatures with respect to neat PP due to the influence of fibers on matrix.

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Section: Introductionmentioning

confidence: 99%

Polypropylene Composites Reinforced with Biodegraded Sugarcane Bagasse Fibers: Static and Dynamic Mechanical Properties

et al. 2016

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“…Baseados na curva de perda de massa dessa fibra, os autores observaram maior estabilidade térmica no compósito sem agente de acoplamento, porém todos os compósitos apresentaram dois estágios de degradação [10] . Joseph et al [11] realizaram modificações químicas na fibra de sisal (Agave sisalana), utilizando o derivado de uretano do polipropileno glicol, o polipropileno modificado com anidrido maleico e o permanganato de potássio (KMnO 4 ), com a intenção de melhorar a adesão interfacial entre a fibra e a matriz. A mistura das fibras com o PP se deu em uma câmara de mistura e os percentuais da fibra se mantiveram em 20% em massa para todos os compósitos com fibra tratada.…”

Section: Introductionunclassified

“…Os compósitos contendo 30% em massa de fibras curtas de sisal apresentaram um aumento significativo de 8 °C frente ao PP puro. Para este sistema o grau de cristalinidade também aumentou [11] . Assim, em vista do potencial de utilização de fibras naturais em compósitos poliméricos, neste artigo são apresentados resultados dos compósitos a base de HDPE e fibra de bananeira, variandose o percentual e o tamanho da fibra, bem como a temperatura de extrusão.…”

Section: Introductionunclassified

Substituição da fibra de vidro por fibra de bananeira em compósitos de polietileno de alta densidade: parte 1. Avaliação mecânica e térmica

Gomes¹,

Visconte²,

Pacheco³

2013

Polímeros

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Resumo: A utilização de resíduo de fibra natural em substituição à fibra de vidro foi avaliada. Foram estudados compósitos de polietileno de alta densidade, HDPE, e fibra de bananeira com 10, 20, 30 e 40% (m/m) de fibra. Compósitos com fibra de vidro, mesma matriz polimérica e nas mesmas proporções, foram preparados para comparação. Os compósitos foram obtidos em extrusora dupla-rosca co-rotacional interpenetrante e os corpos de prova foram preparados por injeção. As propriedades mecânicas sob tração, flexão e impacto foram avaliadas. As propriedades térmicas foram analisadas por calorimetria diferencial de varredura (DSC) e análise termogravimétrica (TG). A incorporação de fibra de bananeira no HDPE resultou no aumento de cristalinidade do polímero. Houve, também, considerável aumento no grau de reforço mecânico nos compósitos pela incorporação da fibra natural. Foi possível comprovar a substituição da fibra de vidro pela fibra de bananeira em determinados percentuais, quando misturados ao HDPE, sem prejuízo às propriedades. A análise termogravimétrica dos compósitos mostrou que o início de degradação se deu numa faixa de temperatura intermediária entre a da fibra e a da matriz polimérica. Palavras-chave: Fibra de bananeira, polietileno de alta densidade, compósitos. Mechanical and Thermal Behavior of Composites Based on High Density Polyethylene and Banana Tree FiberAbstract: The use of banana tree fiber instead of glass fiber in polyethylene composites was evaluated. Composites of high density polyethylene with 10, 20, 30 and 40 wt. % of banana fiber were investigated. For comparison, composites with glass fiber, with the same polymeric matrix and proportions, were prepared. The samples were produced using an intermeshing co-rotating twin-screw extruder and injection molding. The mechanical properties investigated were the tensile, flexural and impact resistances of the composite. Thermal analyses were carried out by differential scanning calorimetry (DSC) and thermogravimetry (TG). The incorporation of fiber resulted in an increase in the composite degree of crystallinity. A considerable increase in mechanical reinforcement was achieved by incorporation of banana fiber in the composites. Thus, the replacement of fiberglass by banana fiber is possible when the components are used in specific proportions. Thermogravimetric analysis of the composites showed intermediate degradation temperatures between the values for banana fiber and polymeric matrix.

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“…The improvement of thermal stability of mixed PP/PPg-MA/SIR-20 compound/crumb rubber is caused by the presence of strong interfacial adhesion among the matrix polypropylene filler that comes from the addition of malead anhydride functional groups, [20] where the group functionalization maleated anhydride in PP-g-MA increases the bond between the face fillers and polypropylene matrix. Polymers are considered heat stable or heat-resistant, if the polymer is not biodegradable under 400 o C temperature and it must maintain its useful at temperatures close to the decomposition temperature.…”

Section: Resultsmentioning

confidence: 99%

THE EFFECT OF SIZE AND CRUMB RUBBER COMPOSITION AS A FILLER WITH COMPATIBILIZER PP-g-MA IN POLYPROPYLENE BLENDS AND SIR-20 COMPOUND ON MECHANICAL AND THERMAL PROPERTIES

Frida¹

2013

MST

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Having been researched the development of thermoplastic elastomer material of polypropylene and natural rubber SIR-20 compound with Crumb Rubber as the filler. Reinforced polypropylene with size 60 mesh with 1 mm, and the composition of the Crumb rubber (30, 40, and 50) wt%. Observed mechanical properties are tensile strength, fracture elongation, Young's modulus, tear strength and impact strength. Thermal properties are analyzed by DSC and DTA/TGA. It is acquired that for the size of 60 mesh crumb rubber tensile strength, fracture elongation, Young's modulus, tear strength and impact strength are bigger than 1mm size. The addition of 60 mesh crumb rubber increases but it decreases by adding of 50 weight%. While for crumb rubber 1 mm tensile strength, fracture elongation, tear strength and impact strength decreas. Based on analysis of DSC that the addition of crumb rubber does not make a difference boiling point significantly between samples containing crumb rubber and polypropylene Analysis TGA/DTA to an increase in enthalpy and decomposition temperature with the addition of crumb rubber used and thermal stability. AbstrakPengaruh Ukuran dan Komposisi Serbuk Ban Bekas sebagai Filler dengan Kompatibeliser PP-g-MA pada Campuran Polipropilena dan Kompon SIR-20 terhadap Sifat Mekanik dan Termal. Telah diteliti pengembangan bahan termoplastik elastomer dari polipropilena dan kompon karet alam SIR-20 dengan serbuk ban bekas sebagai bahan pengisi. Polipropilena yang diperkuat dengan serbuk ban bekas dengan ukuran 60 mesh 1 mm, dan komposisi serbuk ban bekas (30, 40, dan 50) %berat. Sifat mekanik yang diamati adalah kekuatan tarik,perpanjangan putus, Modulus Young, kekuatan sobek, dan kekuatan impact. Sifat termal dianalisis dengan DSC dan DTA/TGA.Dari hasil penelitian diperoleh bahwa untuk ukuran serbuk ban bekas 60 mesh kekuatan tarik, perpanjangan putus, modulus Young, kekuatan sobek, dan kekuatan impact lebih besar dibanding ukuran 1 mm. Penambahan serbuk ban bekas 60 mesh mengalami peningkatan namun mengalami penurunan pada penambahan 50 % berat. Sedangkan untuk ukuran serbuk ban bekas 1 mm kekuatan tarik, perpanjangan putus, kekuatan sobek, dan kekuatan impact mengalami penurunan. Dari analisis DSC diperoleh bahwa dengan penambahan serbuk ban bekas tidak menghasilkan perbedaan titik didih yang signifikan antara sampel yang mengandung serbuk ban bekas dan polipropilena. analisis TGA/DTA adanya peningkatan enthalpy dan suhu dekomposisi dengan adanya penambahan serbuk ban bekas dan terjadi stabilitas termal.

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The thermal and crystallisation studies of short sisal fibre reinforced polypropylene composites

Cited by 474 publications

References 27 publications

Polypropylene Composites Reinforced with Biodegraded Sugarcane Bagasse Fibers: Static and Dynamic Mechanical Properties

Polypropylene Composites Reinforced with Biodegraded Sugarcane Bagasse Fibers: Static and Dynamic Mechanical Properties

Substituição da fibra de vidro por fibra de bananeira em compósitos de polietileno de alta densidade: parte 1. Avaliação mecânica e térmica

THE EFFECT OF SIZE AND CRUMB RUBBER COMPOSITION AS A FILLER WITH COMPATIBILIZER PP-g-MA IN POLYPROPYLENE BLENDS AND SIR-20 COMPOUND ON MECHANICAL AND THERMAL PROPERTIES

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