Investigations on mechanical properties of poly(propylene) and poly(lactic acid) reinforced by miscanthus fibers

Bourmaud, Alain; Pimbert, Sylvie

doi:10.1016/j.compositesa.2008.05.023

Cited by 118 publications

(83 citation statements)

References 49 publications

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“…The modulus of PLA/natural fiber composites containing MAPLA increased with fiber content in all cases that is not very surprising. Strength, on the other hand, was often smaller than that of the uncoupled composite indicating poor interfacial adhesion [42,44]. Quero [45] and Avella [46], however, observed the increase of composite strength upon the application of the functionalized polymer.…”

Section: Introductionmentioning

confidence: 99%

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

Csikós

Faludi

Domján

et al. 2015

European Polymer Journal

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Maleic anhydride (MA) grafted poly(lactic acid) (PLA) coupling agents (MAPLA) were prepared by reactive processing. The amount of peroxide initiator and MA was changed in a relatively wide range. Coupling efficiency was checked in PLA/wood composites as a function of grafting degree, coupling agent and wood content. The analysis of the results showed that chain scission takes place in PLA during reactive modification. The occurrence of grafting could not be proved by FTIR spectroscopy, but a detailed NMR analysis showed that the degree of grafting depends on the amount of both reactants; a maximum of 2.5 MA groups/PLA chain could be grafted under the conditions used in the study. The functionalized polymer proved to be an efficient coupling agent in PLA/wood composites. Efficiency increased with increasing number of functionality and coupling agent amount. Coupling resulted in increased strength and reinforcement.Acoustic emission analysis of deformation processes supported by microscopy proved that the dominating local deformation process is the fracture of the fibers, but small extent of debonding also occurs in neat, uncoupled composites. The prevention of debonding by coupling resulted in the improved performance of the composites. Local processes initiate the immediate failure of the composite irrespectively of their mechanism.

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Section: Introductionmentioning

confidence: 99%

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

Csikós

Faludi

Domján

et al. 2015

European Polymer Journal

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“…The matrix which is thermoplastic starch also is hydrophilic. Moreover, the additions of compatibilizer such as maleic anhydride (MA) between polymer and natural fibers are common solutions used to improve the interfacial adhesion of the composites [5,6]. In previous work, the improvement of tensile properties, hardness, creep stability and tensile impact stress after incorporation of KF into the starchg-PP were reported by other researchers .In this study, starch-g-PP and kenaf fibers also used as the previous study but with addition of compatibilizer because the interaction between fiber and matrix influence the mechanical properties of the composites.…”

Section: ''""mentioning

confidence: 99%

Effect of compatibilizer on morphological, thermal and mechanical properties of Starch-Grafted-Polypropylene/Kenaf fibers composites

Eszer

Ishak

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Starch-grafted-polypropylene (starch-g-PP)/kenaf fibres composites were prepared by melt compounding and compression molding. Polypropylene-grafted-maleic anhydrides (MAgPP) were added at different weight contents (1, 3 and 5 wt. %) as compatibilizer. The morphological, thermal and mechanical properties of the composites were characterized using thermogravimetric analysis, scanning electron microscopy, tensile and flexural test. The results indicated that mechanical properties of the composites were improved by addition of compatibilizer. From TGA, the thermal stability of the composites with MAgPP was improved compared with the composites without MAgPP. Finally, scanning electron microscopy of fractured surface revealed better adhesion between the fibers and matrix with presence of compatibilizer.

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“…Polymer blends and composites containing natural polymers (such as starch, cellulose and their derivatives) as biodegradable additives were developed [28][29][30], which were easily extrudable and commercialized. However, the major disadvantage of blending natural polymers into synthetic polymers is their compatibility, resulting in the poor interaction between matrix and filler interphase; this in turn results in inferior mechanical properties [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and morphological properties of high density polyethylene and polylactide blends

Madhu

Bhunia

Bajpai

et al. 2014

Journal of Polymer Engineering

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Polyblend films were prepared from high-density polyethylene (HDPE) and poly(l-lactic acid) (PLLA) up to 20% PLLA by the melt blending method in an extrusion mixer with post-extrusion blown film attachment. The 80/20 (HDPE/PLLA) blend was compatibilized with maleic anhydride grafted polyethylene (PE-g-MA) in varying ratios [up to 8 parts per hundred of resin (phr)]. Tensile properties of the films were evaluated to obtain optimized composition for packaging applications of both non-compatibilized and compatibilized blends. The compositions HDPE80 (80% HDPE and 20% PLLA) and HD80C4 (80% HDPE, 20% PLLA and 4 phr compatibilizer) were found to be optimum for packaging applications. However, better tensile strength (at yield) and elongation (at break) of 80/20 (HDPE/PLLA) blend were noticed in the presence of PE-g-MA. Further, thermal properties and morphologies of these blends were evaluated. Differential scanning calorimetry (DSC) study revealed that blending does not much affect the crystalline melting point of HDPE and PLLA, but heat of fusion of 80/20 (HDPE/PLLA) blend was decreased as compared to that of neat HDPE. Spectroscopy studies showed evidence of the introduction of some new groups in the blends and gaining compatibility in the presence of PE-g-MA. The compatibilizer influenced the morphology of the blends, as apparent from scanning electron microscopy (SEM) and supported by Fourier transform infrared (FTIR).

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Investigations on mechanical properties of poly(propylene) and poly(lactic acid) reinforced by miscanthus fibers

Cited by 118 publications

References 49 publications

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

Modification of interfacial adhesion with a functionalized polymer in PLA/wood composites

Effect of compatibilizer on morphological, thermal and mechanical properties of Starch-Grafted-Polypropylene/Kenaf fibers composites

Mechanical and morphological properties of high density polyethylene and polylactide blends

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