Morphology development of PBT/PE blends during extrusion and its reflection on the rheological properties

Hong, Joung Sook; Kim, Jeong Lim; Ahn, Kyung Hyun; Lee, Seung Jong

doi:10.1002/app.21695

Cited by 22 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, fibers with 10 wt% and 20 wt% of PA6 show higher values of storage modulus as a consequence of PFN maturation. Applying a transient tensile force by Hong et al revealed a significant increase in tensile force due to increased melt strength which was attributed to the presence of fibrillar entities throughout the matrix .…”

Section: Resultsmentioning

confidence: 99%

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

Hajiraissi

Jahani

Hallmann

2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

This work is aimed at investigating the influence of fibrillar morphology of deformed Polyamide 6 (PA6) droplets dispersed in Polypropylene (PP) matrix on the melt viscoelastic behavior of their blends. The blends of PP with various amounts of PA6 (1%, 6%, 10%, and 20%) were prepared by melt mixing in a co‐rotating twin screw extruder and fibrillated by fiber spinning process. Scanning Electron Microscopy revealed that the PA6 spherical droplets form fibrillar inclusions after fiber spinning. The steady and transient shear rheological responses of samples were evaluated in both linear and nonlinear ranges of deformation. Non‐terminal behavior of storage modulus at low frequency appeared as a typical characteristic of fibrillar morphology whose width and value depend on fibril growth. Storage modulus and complex viscosity of the blends containing PA6 fibrillated structure were remarkably enhanced compared to as‐extruded samples. The fibrillar‐induced elasticity of the fibers is a distinguishable behavior which was revealed by conducting transient stress and creep‐recovery measurements and upon appearing mature fibrils, elasticity of the polymer blend fibers increased significantly. POLYM. ENG. SCI., 58:1251–1260, 2018. © 2017 Society of Plastics Engineers

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

Hajiraissi

Jahani

Hallmann

2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

show abstract

“…That frequently occurs when PBT notched specimens are tested under impact. In order to decrease its notch sensitivity and improve its toughness, different tough modifiers materials have been blended to PBT [10][11][12][13][14] . Acrylonitrilebutadiene-styrene (ABS) terpolymer has been successfully used to tough PBT [15][16][17][18][19][20][21] .…”

Section: Introductionmentioning

confidence: 99%

The effect of extrusion conditions and the use of a compatibilizer in the crystallization of PBT/ABS blends

et al. 2013

View full text Add to dashboard Cite

Poly(butylene terephthalate) (PBT)/ acrylonitrile-butadiene-styrene (ABS) terpolymer blends were prepared in a twin screw extruder and the use of methyl methacrylate-glycidyl methacrylate-ethyl acrylate (MGE) terpolymer as compatibilization additive was evaluated. The effect of different screw profiles and mixing conditions were evaluated on the crystallization of the blends. Differential scanning calorimetry (DSC) was used to evaluate melting and crystallization behaviors of the PBT/ABS blends. The binary PBT/ABS blend has shown a double melting peak when cooled at lower cooling rates, mainly due to its melt-recrystallization during the heating up step. ABS has not affected the melting characteristics of neat PBT. The presence of MGE, as a reactive compatibilizer, in the PBT/ABS blends has reduced its heat of fusion and has partially inhibited its melt-recrystallization under heating. As result, it has prevented the occurrence of double melting peak. The epoxy functional groups of the MGE may react in situ to the carbonyls and hydroxyls end groups of the PBT molecules, thereby hindering the mobility of PBT molecules during the crystallization process due to its grafting to the compatibilizer molecules. The melt mixed blends prepared at lower feeding rate have shown a higher degree of crystallinity for the PBT/ABS blend, probably due to degradation of PBT caused by longer residence time in the extruder. The highest shear stress imposed to the blends at higher screw speed increased the degree of crystallinity of PBT, also due to its degradation.

show abstract

“…[7] The pioneering work on the theoretical investigation of the deformation and breakup of Newtonian droplets in Newtonian media was reported by Taylor. [8,9] He found that the droplet size of the emulsion depends on the interfacial tension and viscosity ratio between the dispersed phase and the continuous phase.…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanism of the Formation and Evolution of Phase Structure in PP/PcBR Blends

Yang

Xiao

et al. 2006

Journal of Macromolecular Science, Part B

View full text Add to dashboard Cite

Phase dispersion theory was proposed to study the dynamic process of polymer blending with the help of mineral processing theory. Two constants, dispersion coefficient n and process coefficient b, were calculated for the early dispersion stage to describe the varying velocity of the dispersed phase dimension. In this dispersion theory, the phase dimension of binary blends of polypropylene with poly(cisbutadiene) rubber linearly increased with blending time in the early stage on a double logarithmic scale, which suggested that phase dispersion theory was applicable to the study of polymer blending dynamics. In this study, the influence of the processing conditions, that is, composition, temperature, and shear rate, on the two constants of n and b was also studied. The results showed that n and b decreased with increasing dispersed phase, and reached a minimum when the shear rate was 60 rpm. The dispersion coefficient n first decreased with increasing temperature, reached a minimum when the temperature was 2008C, and then increased with a further increase in temperature, but there was no apparent influence of temperature on the process coefficient b. The coinfluence of blending temperature and shear rate on the dispersion coefficient n showed that the smaller the content of the dispersed phase, the more sensitive the decreasing rate of phase dimension was to the temperature and shear rate.

show abstract

Morphology development of PBT/PE blends during extrusion and its reflection on the rheological properties

Cited by 22 publications

References 16 publications

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

Investigation of rheology and morphology to follow physical fibrillar network evolution through fiber spinning of PP/PA6 blend fiber

The effect of extrusion conditions and the use of a compatibilizer in the crystallization of PBT/ABS blends

Study on the Mechanism of the Formation and Evolution of Phase Structure in PP/PcBR Blends

Contact Info

Product

Resources

About