Comparative studies of mechanical and morphological properties of polylactic acid and polypropylene based natural fiber composites

Bajpai, Pramendra Kumar; Singh, Inderdeep; Madaan, Jitendra

doi:10.1177/0731684412447992

Cited by 155 publications

(85 citation statements)

References 44 publications

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“…Nowadays the main application area of cellulose fiber-reinforced thermoplastics can be found in the automotive industry for nonvisible parts like indoor panels, dashboards, wheel covers, and so on [10,11]. In the last years the use of biobased matrices like polylactide (PLA) becomes more and more important [12,13]. In the near future it is envisaged to establish natural fiber-reinforced biobased plastics apart from the automotive industry for higher loaded components.…”

Section: Introductionmentioning

confidence: 99%

Cellulose Fiber-Reinforced PLA versus PP

Graupner

Müssig

2017

International Journal of Polymer Science

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The present study focuses on a comparison between different cellulose fiber-reinforced thermoplastics. Composites were produced with 30 mass-% lyocell fibers and a PLA or PP matrix with either an injection (IM) or compression molding (CM) process. Significant reinforcement effects were achieved for tensile strength, Young's modulus, and Shore D hardness by using lyocell as reinforcing fiber. These values are significantly higher for PLA and its composites compared to PP and PP-based composites. Investigations of the fiber/matrix adhesion show a better bonding for lyocell in PLA compared to PP, resulting in a more effective load transfer from the matrix to the fiber. However, PLA is brittle while PP shows a ductile stress-strain behavior. The impact strength of PLA was drastically improved by adding lyocell while the impact strength of PP decreased. CM and IM composites do not show significant differences in fiber orientation. Despite a better compaction of IM composites, higher tensile strength values were achieved for CM samples due to a higher fiber length.

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Section: Introductionmentioning

confidence: 99%

Cellulose Fiber-Reinforced PLA versus PP

Graupner

Müssig

2017

International Journal of Polymer Science

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“…The properties of the PHA=PLA blends can be easily modified by changing the polymers or co-polymers molecular weight or by varying the blend composition [7,8] . In this work, the thermal characterization of injection molding blends of PHA=PLA has been investigated.…”

Section: Introductionmentioning

confidence: 99%

Thermal Characterization of Polyhydroxyalkanoates and Poly(lactic acid) Blends Obtained by Injection Molding

Loureiro

Ghosh

Viana

et al. 2014

Polymer-Plastics Technology and Engineering

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In this work we present the thermal characterization of the full scope of polyhydroxyalcanoate and poly(lactic acid) blends obtain by injection molding. Blends of polyhydroxyalcanoate and poly(lactic acid) (PHA/PLA) were prepared in different compositions ranging from 0-100% in steps of 10%. The blends were injection molded and then characterized by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and wide angle X-ray diffraction (WAXD). The increment of PHA fraction increased the degree of crystallinity of the blend and the miscibility of the base polymers as verified by the Fox model. The WAXD analysis indicates that the presence of PHA hindered the PLA crystallization. The crystallization evolution trough PHA weight fraction (wf) shows a phase inversion around 50-60%. SEM analyses confirmed that the miscibility of PHA/PLA blends increased with the incorporation of PHA and became total for values of PHA higher that 50%.

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“…Thus, un-notched Charpy impact testing was conducted and the results are shown in Figure 7. During the testing, all of composite samples were broken completely into two parts due to the brittle nature of the biopolymer [49]. In this light, the biopolymer is a significant factor for analysing the Brittle biopolymer has exhibited a low impact strength [50].…”

Section: Impact Properties Of Compositesmentioning

confidence: 99%

Mechanical properties of kenaf fibre reinforced floreon biocomposites with magnesium hydroxide filler

Lee¹,

Sapuan²,

Lee³

et al. 2016

J. MECH. ENG. SCI.

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This paper presents a study of the mechanical properties of Kenaf fibre (KF) reinforced floreon (FLO)/ magnesium hydroxide (MH) bio-composites. The mixing of all materials was done by using a 21 mm lab twin screw extruder followed by hot pressing. The composite sheet was then cut into specimens for testing purposes. The scanning electron microscopy (SEM) was used to study the cross-section of the interface. In this regard, insufficient resin for fibre wetting, hydrolytic degradation on the biopolymer and poor interfacial bonding were attributed to the low strength profile. Yet, further addition of KF increased the tensile strength and flexural to 18.91 MPa and 73.09MPa, respectively. Nevertheless, inserting KF and MH filler were found to have a positive outcome on the flexural modulus by especially 10KF5MH and 10KF10MH for 3.02GPa and 3.17GPa, respectively. Insertion of KF and MH showed the deterioration of impact strength. However, addition of KF increased the impact strength to 16.82 J/m 2 . FLO is a hydrophobic biopolymer, and showed only 0.49% of the total water absorption in 14 days. Meanwhile, for the first 24 hours, the rates of water absorption were very high for all biocomposites. Hence, it is worth mentioning that the high contents of KF in bio-composites were found to have higher saturation period and higher total amount of water absorption while the MH caused shorter saturation period but lower total amount of water absorption. However, incompatibility of the interface bonding had increased the water absorption of KF/FLO/MH composites. 5KF5MH and 10KF5MH recorded water absorption at 10.65% and 13.33%. On the other hand, 10KF10MH was saturated at day 6 with 6.59 % of water absorption. Although 10KF5MH specimen did not have the best performance in mechanical properties, higher flame retardancy shall provide KF reinforced FLO composite with MH filler for more applications in the advanced sector, especially a hazardous environment.

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Comparative studies of mechanical and morphological properties of polylactic acid and polypropylene based natural fiber composites

Cited by 155 publications

References 44 publications

Cellulose Fiber-Reinforced PLA versus PP

Cellulose Fiber-Reinforced PLA versus PP

Thermal Characterization of Polyhydroxyalkanoates and Poly(lactic acid) Blends Obtained by Injection Molding

Mechanical properties of kenaf fibre reinforced floreon biocomposites with magnesium hydroxide filler

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