Effect of carbon fiber on the capillary extrusion behaviors of high-density polyethylene

Uematsu, Hideyuki; Horisawa, Nobusuke; Horikida, Tomoya; Tanoue, Shuichi; Iemoto, Yoshiyuki

doi:10.1038/pj.2012.167

Cited by 11 publications

(6 citation statements)

References 55 publications

(70 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is important to note that the surface of the extrudates remained smooth and rheological defects were absent in the range of shear rates applied. As observed for other polymer composites containing different types of fillers , addition of graphite nanoplates decreased extrudate‐swell. The nanocomposite containing F‐GnP exhibits a slightly higher elasticity than that with GnP.…”

Section: Resultssupporting

confidence: 67%

Tracking the progression of dispersion of graphite nanoplates in a polypropylene matrix by melt mixing

et al. 2015

View full text Add to dashboard Cite

This work reports the dispersion of graphite nanoplates (GnP) in polypropylene by melt mixing using a small‐scale continuous prototype mixer. The focus is to study the progression of the dispersion of GnP, a process that is not well understood. Composites were prepared with 2 and 4 wt% of GnP, as‐produced and functionalized by grafting polypropylene modified with maleic anhydride to the GnP surface. The processability of the composites was similar to that of polypropylene, as assessed by capillary rheometry. The nanoparticle dispersion was analyzed by optical microscopy. The progression of the number of agglomerates and their size, for pristine and functionalized nanoparticles, was observed along the mixer. The final agglomerate dimensions were found to be similar for pristine and functionalized GnP, and indicated that agglomerate dispersion progressed toward individual nanoparticles. The interface improvement of functionalized GnP with polypropylene was observed by scanning electron microscopy. POLYM. COMPOS., 38:947–954, 2017. © 2015 Society of Plastics Engineers

show abstract

Section: Resultssupporting

confidence: 67%

Tracking the progression of dispersion of graphite nanoplates in a polypropylene matrix by melt mixing

et al. 2015

View full text Add to dashboard Cite

show abstract

“…In to correct the apparent shear rate and apparent shear stress using the Rabinowitch and Bagley equations, respectively. However, we analyzed the extrusion behavior of these samples based on the uncorrected data, because the correction coefficient is almost independent of the fillers in highly dispersed filler system shown in our previous reports [8,9]. As shown in Fig.…”

Section: Measurementsmentioning

confidence: 99%

“…It is relatively easy to understand the origin of reduction in swell in composites having high entanglement and/or large contact among concentrated rigid fillers, because the elastic properties of polymers are suppressed due to formation of network structure of rigid fillers. On the other hand, the reduction in swell in high dispersion system is reported [8,9]. The addition of a small amount of rigid fillers to polymer is a useful method for controlling swell of molten polymer.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of a small amount of rigid fillers to polymer is a useful method for controlling swell of molten polymer. However, the swell of composites containing rigid fillers is reduced, although the elastic properties of the composites differ negligibly from neat polymers [8,9]. Therefore, the origin of swell reduction by addition of rigid fillers has rarely to be determined.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Origin of Reduction in Extrudate Swell of Molten Polymer by Adding of Rigid Fillers

2018

Self Cite

View full text Add to dashboard Cite

The effect of rigid fillers having various shapes and sizes on the extrudate swell of molten polymer was investigated. High-density polyethylene (PE) was used as the matrix polymer to quantify the swell behaviors. The shear viscosity of PE was almost unaffected via the addition of any fillers. However, the swell ratio decreased in the presence of fillers. In particular, the swell ratio was decreased by increasing the aspect ratio of fibrous fillers and the suppression of the swell hardly changed with the size of particle fillers. The first normal stress difference that can quantify the extension of polymer chains under shear flow, changed negligibly in spite of the presence of particle and fibrous fillers. On the other hand, the orientation of fibrous fillers along flow direction was clearly demonstrated based on their dispersion state in the extrudate. The swell of molten polymer containing fillers was greatly reduced by increasing the aspect ratio of fibrous fillers, because the constriction of the oriented polymer chains at die exit was suppressed by sticking on the surface of oriented fibrous fillers.

show abstract

“…Our previous work attempted to irradiate HDPE-based CFRTPs by an electron-beam to enhance their mechanical properties [ 20 ]. Generally, with HDPE, it is difficult to obtain satisfactory mechanical properties of HDPE-based CFRTP because HDPE has poor flow properties, which limits infiltration into the spaces between fibers, and has poor interfacial interaction with CF due to the non-polarity of HDPE [ 21 , 22 ]. However, we found that the tensile strength of the irradiated HDPE-based CFRTP was enhanced by simply increasing the absorbed dose.…”

Section: Introductionmentioning

confidence: 99%

Influences of Absorbed Dose Rate on the Mechanical Properties and Fiber–Matrix Interaction of High-Density Polyethylene-Based Carbon Fiber Reinforced Thermoplastic Irradiated by Electron-Beam

Park

Choi

et al. 2020

Polymers

View full text Add to dashboard Cite

In this study, a high-density polyethylene (HDPE)-based carbon fiber-reinforced thermoplastic (CFRTP) was irradiated by an electron-beam. To assess the absorbed dose rate influence on its mechanical properties, the beam energy and absorbed dose were fixed, while the absorbed dose rates were varied. The tensile strength (TS) and Young’s modulus (YM) were evaluated. The irradiated CFRTP TS increased at absorbed dose rates of up to 6.8 kGy/s and decreased at higher rates. YM showed no meaningful differences. For CFRTPs constituents, the carbon fiber (CF) TS gradually increased, while the HDPE TS decreased slightly as the absorbed dose rates increased. The OH intermolecular bond was strongly developed in irradiated CFRTP at low absorbed dose rates and gradually declined when increasing those rates. X-ray photoelectron spectroscopy analysis revealed that the oxygen content of irradiated CFRTPs decreased with increasing absorbed dose rate due to the shorter irradiation time at higher dose rates. In conclusion, from the TS viewpoint, opposite effects occurred when increasing the absorbed dose rate: a favorable increase in CF TS and adverse decline of attractive hydrogen bonding interactions between HDPE and CF for CFRTPs TS. Therefore, the irradiated CFRTP TS was maximized at an optimum absorbed dose rate of 6.8 kGy/s.

show abstract

Effect of carbon fiber on the capillary extrusion behaviors of high-density polyethylene

Cited by 11 publications

References 55 publications

Tracking the progression of dispersion of graphite nanoplates in a polypropylene matrix by melt mixing

Tracking the progression of dispersion of graphite nanoplates in a polypropylene matrix by melt mixing

Origin of Reduction in Extrudate Swell of Molten Polymer by Adding of Rigid Fillers

Influences of Absorbed Dose Rate on the Mechanical Properties and Fiber–Matrix Interaction of High-Density Polyethylene-Based Carbon Fiber Reinforced Thermoplastic Irradiated by Electron-Beam

Contact Info

Product

Resources

About