Morphological studies of (polyamide‐6)/(silane‐grafted high‐density polyethylene)/nanoclay ternary nanocomposites

J of Applied Polymer Sci

et al. 2019

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.

Section: Resultsmentioning

confidence: 99%

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

J of Applied Polymer Sci

et al. 2019

“…On the other hand, the interfacial tension is prone to resist the deformation of the droplets. The weak interface leads to high interfacial tension, resulting in the formation of the sphere of HDPE to thermodynamically minimize the specific interfacial area . With the increase of LiCl from 0% to 2.5%, global HDPE was transformed into the irregular shape, and more evenly dispersed in PA6.…”

Section: Results and Discutionmentioning

confidence: 99%

“…The weak interface leads to high interfacial tension, resulting in the formation of the sphere of HDPE to thermodynamically minimize the specific interfacial area. [35][36][37] With the increase of LiCl from 0% to 2.5%, global HDPE was transformed into the irregular shape, and more evenly dispersed in PA6. Besides, the particle size was gradually decreased to less than 1 μm ( Figure 6B-D), implying that LiCl could enhance the interfacial adhesion of PA6 and HDPE.…”

Section: Morphology Analysismentioning

confidence: 99%

Impact of lithium chloride on the performance of wood fiber reinforced polyamide 6/high‐density polyethylene blend composites

Chen

et al. 2019

Polymer Composites

Wood fiber reinforced polyamide 6 (PA6) and high‐density polyethylene (HDPE) blend composites were prepared via hot pressing. The PA6 was modified by lithium chloride (LiCl) for reducing the melting point. Crystallization analysis exhibited the decrease of the melting point (220°C to none) and the processing temperature (240°C to 200°C) of PA6. Thus, undesired discoloration and degradation were improved. LiCl was in favor of the interfacial compatibility among PA6, HDPE, and wood fiber. Also the LiCl could enhance the mechanical properties of the final products. The maximum flexural strength can reach up to 100.4 MPa. Besides, both maleic anhydride grafted high‐density polyethylene and wood fiber had positive effects on the mechanical performance.

“…Lack of the compatibilizer gave rise to higher interfacial tension between PA6 and HDPE. Therefore, the globular morphology of HDPE, which was prone to minimize the specific interfacial area in thermodynamics, was generated [25][26][27]. When compared with the non-grafted composites, the surface of composites based on 0.500% MAH-grafted composites exhibited a homogeneous dispersion of HDPE with smaller size (Fig.…”

Section: Morphology Analysismentioning

confidence: 99%

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

et al. 2018

Polymer Composites

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.