Effect of carbon nanotube on the mechanical, plasticizing behavior and thermal stability of PVC/poly(acrylonitrile–styrene–acrylate) nanocomposites

This research studies the properties of poly (butylene terephthalate) (PBT)-based systems toughened with thermoplastic polyurethane (TPU; 10, 20, and 30 wt%) and reinforced with multiwalled carbon nanotubes (CNTs; 0.1, 0.2, and 0.3 wt%). Different compositions prepared via melt mixing. Morphology studies showed good compatibility between the two polymeric phases in PBT/TPU. The addition of TPU to PBT reduced crystallization rate and melt temperature, while inclusion of CNTs had nucleation effect and increased the degree of crystallinity, crystallization, and melt temperatures. The existence of TPU in PBT caused significant enhancement in notch-impact resistant. The inclusion of CNTs to PBT/TPU blend led to the substantial improvements in tensile and flexural strengths and moduli. Dynamic mechanical thermal analysis revealed that the incorporation of CNTs into PBT/TPU enhanced storage modulus and heightened glass transition temperature. The storage modulus of PBT/TPU/CNT nanocomposite containing 0.5 wt% CNT was comparable with that of pure PBT particularly at high temperatures.

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“…13 –17 More recently, polymer/polymer/CNT ternary nanocomposites have been developed to meet the requirements of critical applications. 10,18 –20…”

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal properties of TPU-toughened PBT/CNT nanocomposites

Tehran

Shelesh‐Nezhad

Barazandeh

2018

Journal of Thermoplastic Composite Materials

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“…It is likely that the forming spatial network made up of dispersed carbon nanotubes restricts the mobility of the macromolecules of the matrix in the molten state. The increase in the viscosity of a processed nanocomposite, found in works, [35,39] was associated with the formation of a spatial network hindering the movement of molten PVC chains and possible adhesion interactions of nanotubes with the macromolecule segments of the matrix. Figure 5 illustrates the relationship of the MFR value as a function of the composition of nanocomposites M-I and M-IOA.…”

Section: Discussion Of the Resultsmentioning

confidence: 91%

Influence of MWCNT on the Processing Properties and Structure of PVC Composites

Skórczewska

Tomaszewska

Piszczek

2018

Macromolecular Symposia

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The preparation of nanocomposites by incorporation of nanoparticles, in particular the carbon nanotubes in a molten polymeric matrix could find potential application in industry technologies as a method of the manufacturing of new engineering materials. Considering the complex transformations of PVC grains during processing as well as weak dispersibility of nanotubes caused by their high tendency to agglomeration are crucial to investigate the influence of MWCNT content on PVC processability. For this purpose the plastographmetric analysis of processing of PVC/MWCNT blends are carried out. The results of the research show that the presence of nanotubes causes an increase in shearing stress, which leads to PVC grains disintegration and faster gelation compared to the unmodified PVC blend. At the same time, the carbon nanotubes dispersed in the molten PVC blend lead to intensification of the process, which occurs at a lower temperature.

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“…Neat PVC exhibited typical rigid and brittle fracture morphology with a relatively smooth surface (17,48). The fracture surface of the PVC/ASA blend (Figure 4) appeared rougher than pure PVC and exhibited microlayer structure due to the core-shell morphology of ASA with internal PBA core layer and outer SAN shell layer (28,49). The structure gained some ductile characteristics with the incorporation of ASA and a corrugated and irregular fracture surface was observed.…”

Section: Sem Analysismentioning

confidence: 99%

“…Several studies have reported regarding the PVC/ASA blends and its nanocomposites. Wang et al (28) studied the influence of multi-walled carbon nanotubes (MWCNTs) on plasticizing behavior, mechanical properties and thermal stability of PVC/ASA blends, and the impact strength was found to be 83.7 % higher than pure PVC/ASA blend for MWCNT content of 0.054 wt%. Rimdusit et al (2) discussed the effect of coconut fiber contents on mechanical, thermal, and physical properties of PVC/ASA blends, and they found a tensile strength value of 45 MPa with the addition of 50 wt% coconut fibers to the blend structure.…”

Section: Introductionmentioning

confidence: 99%

Effect of o-MMT content on properties of Poly (vinyl chloride)/Poly (acrylonitrile styrene acrylate) blends

Kökçan

Tamer

2020

Journal of the Turkish Chemical Society Section A: Chemistry

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In this study, poly(vinyl chloride) (PVC)/poly(acrylonitrile styrene acrylate) (ASA)/ organophilic montmorillonite (o-MMT) nanocomposites were prepared and the effects of o-MMT content on the properties of PVC/ASA blends were investigated. The thermal stability, mechanical properties and water absorption percentages of the nanocomposites were studied. Surface morphology studies of the o-MMT containing blends were also performed using scanning electron microscopy (SEM). Thermogravimetric analysis (TGA) test results showed that o-MMT inclusion enhanced the thermal stability of PVC/ASA/o-MMT nanocomposites and the decomposition temperature at 50% weight loss (Td50) increased by 7.5 ˚C when the o-MMT content was 10 wt%. The tensile strength value of the neat blend was obtained as 32.51 MPa and found to increase as 36.01 MPa when the o-MMT content was 6 wt% in the system. The water absorption test results demonstrated that the water-resistance of the samples enhanced as the o-MMT content increased. Moreover, PVC/ASA blends exhibited a significant increase in the contact angle by the presence of hydrophobic o-MMT. The weathering test results demonstrated that the PVC/ASA/o-MMT nanocomposite films could be used for outdoor applications without apparently losing their properties.

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Effect of carbon nanotube on the mechanical, plasticizing behavior and thermal stability of PVC/poly(acrylonitrile–styrene–acrylate) nanocomposites

Cited by 17 publications

References 25 publications

Mechanical and thermal properties of TPU-toughened PBT/CNT nanocomposites

Mechanical and thermal properties of TPU-toughened PBT/CNT nanocomposites

Influence of MWCNT on the Processing Properties and Structure of PVC Composites

Effect of o-MMT content on properties of Poly (vinyl chloride)/Poly (acrylonitrile styrene acrylate) blends

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