Thermogravimetric and dynamic mechanical thermal analysis of pineapple fibre reinforced polyethylene composites

George, Jesiya Susan; Bhagawan, S. S.; Thomas, Sabu

doi:10.1007/bf01979452

Cited by 164 publications

(80 citation statements)

References 20 publications

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“…This weight loss corresponded to the thermal degradation of dehydrocellulose. 8 Thus, we can use this data to select temperature processing for the composite.…”

Section: Resultsmentioning

confidence: 99%

“…In the first stage, the degradation started from 250 to 294 C, and about 7% weight loss of the PALF corresponds to the thermal degradation of lignin and dehydrocellulose. 8 For the second stage which was the main peak, the maximum degradation temperature was 364 C with a weight loss of $ 56%. This weight loss corresponded to the thermal degradation of dehydrocellulose.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Pineapple leaf fiber reinforced thermoplastic composites: Effects of fiber length and fiber content on their characteristics

Chollakup

Tantatherdtam

Ujjin

et al. 2010

J of Applied Polymer Sci

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Pineapple leaf fiber (PALF) was used as a reinforcement in polyolefins. Polypropylene (PP) and lowdensity polyethylene (LDPE) composites with different fiber lengths (long and short fibers) and fiber contents (0-25%) were prepared and characterized. The results showed that the tensile strength of the composites increased when the PALF contents were increased. It was observed that the composites containing long fiber PALF were stronger than the short fiber composites as determined by greater tensile strength. An SEM study on the tensile fractured surface confirmed the homogeneous dispersion of the long fibers in the polymer matrixes better than dispersion of the short fibers. The unidirectional arrangement of the long fibers provided good interfacial bonding between the PALF and polymer which was a crucial factor in achieving high strength composites. Reduction in crystallinity of the composites, as evident from XRD and DSC studies suggested that the reinforcing effect of PALF played an important role in enhancing their mechanical strength. From the rule of mixtures, the stress efficiency factors of the composite strength could be calculated. The stress efficiency factors of LDPE were greater than those of PP. This would possibly explain why the high modulus fiber (PALF) had better load transfers to the ductile matrix of LDPE than the brittle matrix of PP.

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“…This weight loss corresponded to the thermal degradation of dehydrocellulose. 8 Thus, we can use this data to select temperature processing for the composite.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Pineapple leaf fiber reinforced thermoplastic composites: Effects of fiber length and fiber content on their characteristics

Chollakup

Tantatherdtam

Ujjin

et al. 2010

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…12 It was found that PALF degraded before the polyethylene matrix and the thermal stability of the composite is increased by the better fiber matrix adhesion after chemical treatments with isocyanate, peroxide, and silane treatments. Espert et al 13 showed that addition of cellulose improved the thermomechanical behavior of PP and use of PP containing a small quantity of ethyl vinyl acetate, resulted in more desirable thermal and thermo oxidative stabilities.…”

Section: Introductionmentioning

confidence: 98%

Effect of chemical modifications on the thermal stability and degradation of banana fiber and banana fiber‐reinforced phenol formaldehyde composites

Joseph

Sreekala

Thomas

2008

J of Applied Polymer Sci

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Banana fiber has been modified by treatments with sodium hydroxide, silanes, cyanoethylation, heat treatment, and latex treatment and the thermal degradation behavior of the fiber was analyzed by thermogravimetry and derivative thermogravimetry analysis. Both treated and untreated fibers showed two-stage decomposition. All the treatments were found to increase the thermal stability of the fiber due to the physical and chemical changes induced by the treatments. The thermal degradation of treated and untreated banana fiber-reinforced phenol formaldehyde composites has also been analyzed. It was found that the thermal stability of the composites was much higher than that of fibers but they are less stable compared to neat PF resin matrix. Composite samples were found to have four-stage degradation. The NaOH treated fiber-reinforced composites have very good fiber/ matrix adhesion and hence improvement in thermal stability is observed. Though both silane treatments increased the thermal stability of the composite the vinyl silane is found to be more effective. Heat treatment improves the crystallinity of the fiber and decreases the moisture content, hence an improved thermal stability. The latex treatment and cyanoethylation make the fiber surface hydrophobic, here also the composite is thermally more stable than untreated one.

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“…Ou seja, a introdução de fibra de coco tende a reduzir tanto o módulo de elasticidade quanto a resistência mecânica da matriz poliéster. (18) No caso de outros compósitos, (15,23) …”

Section: Resultsunclassified

Efeito Da Incorporação De Fibras De Coco No Comportamento Dinâmico-Mecânico De Compósitos Com Matriz Poliéster

Monteiro

Rodrigues

Lopes

et al. 2008

TMM

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ResumoRealizou-se um estudo da variação com a temperatura dos parâmetros dinâmico-mecânicos de compósitos com matriz poliéster incorporada com fibras de coco. Diferentes percentagens em peso de fibras de coco, até 40%, foram misturadas com resina poliéster ortoftálica e, após prensagem, curada por 24 horas à temperatura ambiente. Ensaios dinâmico-mecânicos (DMA) foram realizados para se obter os módulos de armazenamento e perda, bem como a tangente delta para cada tipo de compósito com diferentes quantidades de fibra de coco. Os resultados desses parâmetros revelam que a incorporação de fibra de coco diminui a rigidez viscoelástica do compósito com matriz poliéster. Esta redução na rigidez está associada à baixa tensão interfacial, o que dificulta a transferência de esforços mecânicos da matriz para a fibra. Ocorrem também modificações na temperatura de transição vítrea e no pico α de relaxação com a incorporação de fibras de coco. Em particular, o amortecimento do compósito que está relacionado ao valor da tangente delta, diminui a quantidade de fibra incorporada pelo fato de somente parte da tensão aplicada deformar a interface fibra/matriz. Palavras-chave: Fibra vegetal; Compósitos; Matriz poliéster; Comportamento; Temperatura de transição. EFFECT OF COIR FIBER INCORPORATION IN DYNAMIC MECHANIC BEHAVIOR OF POLYESTER-MATRIX COMPOSITES AbstractA study on the temperature variation of the dynamic-mechanical parameters of polyester matrix composites incorporated with continuous coir fibers was carried out. Different weight percentages, up to 40 wt.% of coir fibers, were mixed with orthophtalic polyester resin and, after press-molding, cured for 24 hours at room temperature. Dynamicmechanical, DMA, tests were conducted to obtain the storage modulus and the loss modulus as well as the tangent delta for each type of composite with different amounts of coir fibers. The DMA results revealed that the incorporation of coir fiber decreases the viscoelastic stiffness of the composite with polyester matrix. This reduction in stiffness is associated with a low interfacial shear stress, which makes it difficult for the mechanical load transfer from the matrix to the fiber. Modifications in the glass transition temperature and in the α relaxation peak also occurred with the amount of incorporated coir fiber. In particular, the damping response of the composite, associated with the value of the tangent delta, decreases with the amount of incorporated fiber owing to the fact that only part of the applied stress was used to deform the fiber/matrix interface.

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Thermogravimetric and dynamic mechanical thermal analysis of pineapple fibre reinforced polyethylene composites

Cited by 164 publications

References 20 publications

Pineapple leaf fiber reinforced thermoplastic composites: Effects of fiber length and fiber content on their characteristics

Pineapple leaf fiber reinforced thermoplastic composites: Effects of fiber length and fiber content on their characteristics

Effect of chemical modifications on the thermal stability and degradation of banana fiber and banana fiber‐reinforced phenol formaldehyde composites

Efeito Da Incorporação De Fibras De Coco No Comportamento Dinâmico-Mecânico De Compósitos Com Matriz Poliéster

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