Effect of Coupling Agents on the Mechanical Properties of Wheat Straw Flour and Polyethylene Composites

Cai, Hong; Yi, Wei; Bai, Xue

doi:10.4028/www.scientific.net/amr.383-390.3145

Cited by 3 publications

(4 citation statements)

References 8 publications

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“…However, a multimolecular layer induced by excess MAPE (above 15%) was formed on the surface of MCC and PA6. It is difficult to bear further external loads due to the multimolecular layer of MAPE [ 19 ]. Furthermore, as the polar polymer, excess MAPE (above 15%) tended to aggregate and the formation of stress concentration decreased the flexural strength.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Properties of a Novel Microcrystalline Cellulose-Filled Composites Based on Polyamide 6/High-Density Polyethylene

He³

et al. 2017

Materials

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In the present study, lithium chloride (LiCl) was utilized as a modifier to reduce the melting point of polyamide 6 (PA6), and then 15 wt % microcrystalline cellulose (MCC) was compounded with low melting point PA6/high-density polyethylene (HDPE) by hot pressing. Crystallization analysis revealed that as little as 3 wt % LiCl transformed the crystallographic forms of PA6 from semi-crystalline to an amorphous state (melting point: 220 °C to none), which sharply reduced the processing temperature of the composites. LiCl improved the mechanical properties of the composites, as evidenced by the fact that the impact strength of the composites was increased by 90%. HDPE increased the impact strength of PA6/MCC composites. In addition, morphological analysis revealed that incorporation of LiCl and maleic anhydride grafted high-density polyethylene (MAPE) improved the interfacial adhesion. LiCl increased the glass transition temperature of the composites (the maximum is 72.6 °C).

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Section: Resultsmentioning

confidence: 99%

Preparation and Properties of a Novel Microcrystalline Cellulose-Filled Composites Based on Polyamide 6/High-Density Polyethylene

He³

et al. 2017

Materials

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“…Due to the strong polarity, excess MAPE tended to aggregation, and formed multimolecular layer on the surfaces of MCC and PA6. As a result, the stress concentration and brittle multimolecular layer decreased the flexural strength . However, MAH exhibited no substantial change in the flexural modulus (Fig.…”

Section: Resultsmentioning

confidence: 94%

Impact of lithium chloride and in‐situ grafting on the performance of microcrystalline cellulose‐filled composites based on polyamide 6/high‐density polyethylene

Fang

et al. 2018

Polymer Composites

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Polyamide 6 (PA6) and high-density polyethylene were blended with lithium chloride (LiCl) and maleic anhydride (MAH), and then mixed with 15 wt% microcrystalline cellulose to prepare the composites via hot-pressing technology. Crystallization analysis exhibited a decreased melting point of PA6 via the modification of LiCl. The crystallographic forms of PA6 were transformed from semi-crystalline to an amorphous state, thus decreased the processing temperature (from 240 to 200 C). Both LiCl and in-situ grafting of MAH had positive effects on the mechanical properties, the impact strength of the composites were increased by 60 and 125%, respectively. Morphological analysis revealed both LiCl and the in-situ grafting of MAH improved the interfacial compatibility. Dynamic mechanical properties showed LiCl increased the glass transition temperature of the composites (from 61 to 77 C), and improved the viscous response at the high temperature. POLYM. COMPOS., 2018.

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“…Excessive MAPP with a strong polarity was easy to aggregate, and it generated a multimolecular layer on the surface of PA6 and poplar wood fiber. Thereby, the brittle multimolecular layer and stress concentration decreased the flexural strength . The composites with various MAPP contents had comparable flexural moduli [Figure (c)]; this implied that the inherent stiffness of the materials was in charge of the flexural modulus instead of the compatibility.…”

Section: Resultsmentioning

confidence: 99%

“…The increase was attributed to the improvement of the interfacial compatibility between PA6 and PP, where the external energy could be easily transferred and dissipated from rigid PA6 to PP and poplar wood fiber with a better impact strength of its own. With a further increase in MAPP, the impact strength decreased for the brittle multimolecular layer, and the stress concentration resulted from excess MAPP …”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of wood‐fiber‐reinforced polyamide 6–polypropylene blend composites

Fang

et al. 2019

J of Applied Polymer Sci

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In this study, we used lithium chloride (LiCl) as a modifier to decrease the melting temperature (T m) of polyamide 6 (PA6), and then, we fabricated wood‐fiber‐reinforced PA6–polypropylene (PP) blend composites via hot pressing. From crystallization analysis, the composites exhibited a lower T m and a lower processing temperature compared to PA6. Color and Fourier transform infrared analyses showed that severe thermal degradation and discoloration of the composites could be prevented by the incorporation of LiCl. LiCl had positive effects on the mechanical properties of the final product and the interfacial compatibility among PA6, PP, and wood fiber. The flexural strength increased by 8.5%. In addition, both maleic anhydride grafted PP and wood fiber improved the mechanical properties. The flexural strengths increased by 7.9 and 40%, respectively. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47413.

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Effect of Coupling Agents on the Mechanical Properties of Wheat Straw Flour and Polyethylene Composites

Cited by 3 publications

References 8 publications

Preparation and Properties of a Novel Microcrystalline Cellulose-Filled Composites Based on Polyamide 6/High-Density Polyethylene

Preparation and Properties of a Novel Microcrystalline Cellulose-Filled Composites Based on Polyamide 6/High-Density Polyethylene

Impact of lithium chloride and in‐situ grafting on the performance of microcrystalline cellulose‐filled composites based on polyamide 6/high‐density polyethylene

Preparation and characterization of wood‐fiber‐reinforced polyamide 6–polypropylene blend composites

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