Combined effect of compatibilizer and carbon nanotubes on the morphology and electrical conductivity of PP/PS blend

Chen, Jie; Hou, Yanbei; Zhang, Meili; Liú, Dan; Yang, Jing‐hui; Wang, Yong; Zhou, Zuowan; Yuan, Guanming

doi:10.1002/pat.3259

Cited by 16 publications

(8 citation statements)

References 22 publications

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“…To conclude, three kinds of different nanofillers promoting PP/PS compatibility tended to locate on the interface under elongation flow. It was consistent with previous studies that nanofillers entrapped in the interface led to the improvement of the interaction of PP/PS and reduced the PS particle size …”

Section: Resultssupporting

confidence: 93%

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

Zhang

Tan

Chen

et al. 2018

Polymers for Advanced Techs

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Three kinds of nanoscaled fillers, namely, zero-dimensional nanosphere titanium dioxide (TiO 2 ), one-dimensional multi-walled carbon nanotubes (MWCNTs), and twodimensional nanoplate montmorillonite (MMT), were added to the representative polypropylene (PP)/polystyrene (PS) blends by eccentric rotor extruder based on elongation flow. Confirmed from images of transmission electron microscopy and scanning electron microscopy, three kinds of nanofillers were uniformly dispersed in the blends under continuous elongation flow and the presence of nanofillers led to a marked decrease of dispersed phase size of PS. The dispersed PS particles were turned into spherical status in matrix with the addition of TiO 2 and MWCNTs and showed irregular shapes in the composites with MMT. The PS particle size of PP/ PS/MMT was decreased most obviously, dropping from 4.44 to 1.42 μm, which resulted in obvious improvements in storage modulus and complex viscosity of the composites. The results of wide-angle X-ray diffraction and dynamic mechanical analysis indicated that MMT nanoparticles were highly intercalated in PP/PS blends, which obviously improved compatibility of PP and PS. Our work certified that the two-dimensional nanoplate MMT are better compatibilizers compared with the zero-dimensional nanosphere TiO 2 and one-dimensional MWCNTs for PP/PS composites.

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Section: Resultssupporting

confidence: 93%

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

Zhang

Tan

Chen

et al. 2018

Polymers for Advanced Techs

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“…Depending on the used binary blend, the nanoparticles were added alone or with a compatibilizer [ 6 , 9 , 24 , 25 , 26 , 40 , 41 , 42 , 43 ]. For example, Chen, J. et al have shown that introducing 5 wt.% of SEBSg-MA in PP/PS (70/30 wt.%) co-continuous matrix reduces PT from 1.22 wt.% for PP/PS/MWCNTs to 0.66 wt.% for PP+SEBS-g-MA/PS/MWCNTs [ 44 ]. Other additives like graphene, graphene oxide (GO), organoclay, CB, noncovalent and covalent modifiers were also reported in the literature to reduce the PT of PB/CNTs co-continuous systems [ 9 , 11 , 24 , 28 , 41 , 45 , 46 , 47 ].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Low Percolation Threshold Induced by Thermal Treatments in Co-Continuous Blend-Based PP/PS/MWCNTs Nanocomposites

et al. 2021

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The effect of the crystallization of polypropylene (PP) forming an immiscible polymer blend with polystyrene (PS) containing conductive multi-wall carbon nanotubes (MWCNTs) on its electrical conductivity and electrical percolation threshold (PT) was investigated in this work. PP/PS/MWCNTs composites with a co-continuous morphology and a concentration of MWCNTs ranging from 0 to 2 wt.% were obtained. The PT was greatly reduced by a two-step approach. First, a 50% reduction in the PT was achieved by using the effect of double percolation in the blend system compared to PP/MWCNTs. Second, with the additional thermal treatments, referred to as slow-cooling treatment (with the cooling rate 0.5 °C/min), and isothermal treatment (at 135 °C for 15 min), ultra-low PT values were achieved for the PP/PS/MWCNTs system. A 0.06 wt.% of MWCNTs was attained upon the use of the slow-cooling treatment and 0.08 wt.% of MWCNTs upon the isothermal treatment. This reduction is attributed to PP crystals’ volume exclusion, with no alteration in the blend morphology.

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“…Some literatures have reported that the major constituents of WEEE plastics include polypropylene (PP) and high‐impact polystyrene (HIPS) . Recycling mixed plastics via the preparation of blends attracts increasing attention since the outstanding improvements such as impact strength and processability compared with the uncompatibilizing blends …”

Section: Introductionmentioning

confidence: 99%

Effects of polystyrene‐b‐poly(ethylene/propylene)‐b‐polystyrene compatibilizer on the recycled polypropylene and recycled high‐impact polystyrene blends

Kong

et al. 2018

Polymers for Advanced Techs

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The recycled polypropylene/recycled high-impact polystyrene (R-PP/R-HIPS) blends were melt extruded by twin-screw extruder and produced by injection molding machine. The effects of polystyrene-b-poly(ethylene/propylene)-b-polystyrene copolymer (SEPS) used as compatibilizer on the mechanical properties, morphology, melt flow index, equilibrium torque, and glass transition temperature (T g ) of the blends were investigated. It was found that the notch impact strength and the elongation at break of the R-PP/R-HIPS blends with the addition of 10 wt% SEPS were 6.46 kJ/m 2 and 31.96%, which were significantly improved by 162.46% and 57.06%, respectively, than that of the uncompatibilized blends. Moreover, the addition of SEPS had a negligible effect on the tensile strength of the R-PP/R-HIPS blends. Additionally, the morphology of the blends demonstrated improved distribution and decreased size of the dispersed R-HIPS phase with increasing the SEPS content. The increase of the melt flow index and the equilibrium torque indicated that the viscosity of the blends increased when the SEPS was incorporated into the R-PP/R-HIPS blends. The dynamic mechanical properties test showed that when the content of SEPS was 10 wt%, the difference of T g decreased from 91.72°C to 81.51°C. The results obtained by differential scanning calorimetry were similar to those measured by dynamic mechanical properties, indicating an improved compatibility of the blends with the addition of SEPS.

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Combined effect of compatibilizer and carbon nanotubes on the morphology and electrical conductivity of PP/PS blend

Cited by 16 publications

References 22 publications

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

Dimensional impact of nanofillers on the micromorphology and rheology of PP/PS composites under continuous elongation flow

Ultra-Low Percolation Threshold Induced by Thermal Treatments in Co-Continuous Blend-Based PP/PS/MWCNTs Nanocomposites

Effects of polystyrene‐b‐poly(ethylene/propylene)‐b‐polystyrene compatibilizer on the recycled polypropylene and recycled high‐impact polystyrene blends

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