LCP Based Polymer Blend Nanocomposites

Nayak, Ganesh Chandra; Das, C. K.

doi:10.1007/978-3-319-22894-5_8

Cited by 2 publications

(9 citation statements)

References 67 publications

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“…The exfoliated CNTs exhibit a high aspect ratio and can be trapped at the TLCP and thermoplastic matrices' interface. [57] The trapping behavior forms bridging elements between TLCP and thermoplastic matrices, which could efficiently prevent phase separation and enhance the adhesion. [48,57,79] MAPP was also able to enhance the tensile strength of the WTC and multiscale WTC by 20.2% and 21.1% to 89.59 MPa and 128.83 MPa, respectively.…”

Section: Tensile Properties Of Wtc Filamentsmentioning

confidence: 99%

“…[57] The trapping behavior forms bridging elements between TLCP and thermoplastic matrices, which could efficiently prevent phase separation and enhance the adhesion. [48,57,79] MAPP was also able to enhance the tensile strength of the WTC and multiscale WTC by 20.2% and 21.1% to 89.59 MPa and 128.83 MPa, respectively. As a compatibilizer, MAPP in the TLCP (Vectra B950)/PP WTC interacts with PP and have hydrogen bonding with TLCP, which leads to compatibilization and enhances the interfacial adhesion of TLCP (Vectra B950/PP blends.…”

Section: Tensile Properties Of Wtc Filamentsmentioning

confidence: 99%

“…This is because of the bridging effect of CNTs at the interface, which could generate drag force by the PP matrix upon the TLCP domain. [57] The TLCP domain would then deform and elongate in the fluid flow direction, which presents better fibrillation of the TLCP. However, the CNT aggregates in the matrix limit the mechanical properties' enhancement.…”

Section: Morphology Of Wtc and Multiscale Wtc Filamentsmentioning

confidence: 99%

“…[49][50][51][52][53][54][55][56] CNTs are ideal to use for the enhancing properties of polymer and polymer composites due to their outstanding mechanical properties, high aspect ratio, low density, and thermal and conductive properties. [57] Besides, CNTs have been discovered for the development of multifunctional polymer nanocomposites with lightweight. [58] However, a large concentration of CNTs may not be able to improve the high performance of the composites due to nonuniform dispersion in the matrix.…”

Section: Introductionmentioning

confidence: 99%

“…[59] To improve the CNTs' dispersion, the chemical modification could be introduced and it allows CNTs to form functionalization groups, but the modification may break and introduce defective sites in CNTs. [57] To overcome these issues, supercritical carbon dioxide (scCO 2 )-aided exfoliation process developed by Zhamu and Zang [60] could be considered as an alternative method to disperse CNTs in matrices. [61][62][63][64] This method was later improved by Baird and coworkers.…”

Section: Introductionmentioning

confidence: 99%

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Thermotropic liquid crystalline polymer reinforced polypropylene composites enhanced with carbon nanotubes for use in fused filament fabrication

Han

Chen

et al. 2021

Polymer Composites

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The objective of this research was to enhance the mechanical properties of wholly thermoplastic composites (WTCs) used in fused filament fabrication (FFF). Multiscale thermoplastic composites, which were based on the use of polypropylene (PP) reinforced with thermotropic liquid crystalline polymer (TLCP) and carbon nanotubes (CNTs), were prepared by a method combining supercritical carbon dioxide (scCO 2 )-aided exfoliation and dual-extrusion technologies. Significant enhancement of tensile properties was observed by using 1 wt% exfoliated CNTs to reinforce WTCs consisting of PP with and without maleic anhydride-grafted polypropylene (MAPP, 16 wt%). With 1 wt% CNTs and 16 wt% MAPP dual reinforcement, 20 wt% TLCP reinforced WTCs based on PP exhibited 265%, 274%, and 182% improvement in the tensile modulus of the filaments, laid up specimens in the concentric pattern, and laid up specimens in ±45 rectilinear pattern, respectively. For tensile strength, 1 wt% CNTs reinforcement combined with 16 wt% MAPP improved the 20 wt% TLCP reinforced WTC filaments, laid down parts in the concentric pattern, and ±45 rectilinear patterns by 73%, 53%, and 65%, respectively. The tensile modulus and strength of multiscale WTC based on MAPP/PP specimens laid down with a concentric pattern are higher than those reported for PP/40 wt% short carbon fiber and PP/48.5 wt% short glass fiber laid down specimens. The advanced tensile modulus properties of 1 wt% CNTs reinforced WTCs are competitive with 9 wt% continuous carbon fiber reinforced nylon composite materials in FFF. Scanning electron microscopy analysis showed extremely strong interfacial adhesion between the TLCP fibrils and the matrix in multiscale WTC filaments and laid down parts, compared to the WTCs with no CNTs reinforcement. The advanced interfacial adhesion between TLCP fibrils and matrix resulted in an enhancement in the tensile strength. The exfoliated CNTs were premixed with the matrix, but they were trapped at and aligned with TLCP fibrils, which may be the primary reason for tensile modulus enhancement.

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Section: Tensile Properties Of Wtc Filamentsmentioning

confidence: 99%

Section: Tensile Properties Of Wtc Filamentsmentioning

confidence: 99%

Section: Morphology Of Wtc and Multiscale Wtc Filamentsmentioning

confidence: 99%