Effect of sepiolite on nonisothermal crystallization kinetics of polypropylene

Manchanda, Bindu; Vimal, K. K.; Kapur, G. S.; Kant, Shashi; Choudhary, Veena

doi:10.1007/s10853-016-0210-3

Cited by 15 publications

(12 citation statements)

References 39 publications

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“…When adding O-Sep to PP/ABS blends, the crystallization temperature of blends increased with increasing O-Sep (e.g., PP/ABS/O-Sep1: 116 °C; PP/ABS/O-Sep3: 118 °C; PP/ABS/O-Sep7: 119 °C). This indicates that O-Sep may act as a nucleating agent for the crystallization of PP/ABS, which was consistent with the conclusions of other researchers [41,48,53]. Since ABS and PP have relatively poor compatibility, introducing ABS into the PP matrix may decrease the crystallization ability of PP.…”

Section: Resultssupporting

confidence: 90%

“…It has been reported that many nanoparticles, including SiO 2 , ZnO, CaCO 3 , carbon nanotubes, and montmorillonite, could induce β -nucleation in PP, which resulted in higher crystallization rates [37,38,39,40,41,42,43,44,45,46]. Due to the large specific surface, high surface activity, and lack of abrasion, sepiolite (Sep) is an ideal enhancer for polymers [47,48,49,50,51]. After the Sep nanofiber is de-bundled or modified, it can be compounded with polymers and form new materials with many excellent properties.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

Wang

Xie

et al. 2019

Polymers

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To improve the poor impact toughness of polypropylene (PP), organo-sepiolite (O-Sep) filled 80/20 (w/w) polypropylene/poly(acrylonitrile-butadiene-styrene) (PP/ABS) nanocomposites were fabricated. The contents of O-Sep were correlated with the morphological, mechanical, and rheological behavior of PP/ABS/O-Sep blends. Scanning electron microscopy (SEM) was applied to study the morphology and thermogravimetric analysis (TGA) was applied to study the thermal stability. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) were applied to study the crystallinity. The obtained results show that O-Sep enhanced the dispersion of ABS in the PP matrix and increased the crystallinity of blends. The rheological results show that O-Sep could increase the viscosity, storage modulus, and loss modulus of blends. Moreover, the mechanical behavior shows that O-Sep (at proper content) simultaneously increased the tensile modulus, flexural modulus, and impact strength of PP/ABS/O-Sep blends.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

Wang

Xie

et al. 2019

Polymers

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“…It can be observed that the Avrami index n of PP ranges from 1.9 to 2.2, which illustrates the homogeneous nucleation of PP in the one‐dimensional needle mode. However, The n value for PP/LDH and PP/SLDH is about 1–1.5 during the nucleation process, as exhibited in Table 2, which illustrates the heterogeneous nucleation of LDH and SLDH in needle‐like and two‐dimensional sheet‐like modes 43,44 …”

Section: Resultsmentioning

confidence: 95%

Non‐isothermal crystallization kinetics of polypropylene/layered double hydroxide composites

Guo

Bai

et al. 2021

Polymers for Advanced Techs

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The crystalline behaviors of polymers have a large impact on their physical and mechanical properties, especially as reinforcing and toughening materials in the construction industry. This work investigates the crystallization behaviors of polypropylene (PP) composites with layered double hydroxide (LDH) by using differential scanning calorimeter and a polarizing optical microscope (POM), and analyzed the non‐isothermal crystallization kinetics of PP composites by Avrami model and Mo's method. The results show that the entire process of non‐isothermal crystallization is appropriate for Mo′s method instead of Avrami model due to the offset of the curves in initial nucleation and secondary crystallization stages. The addition of LDH and modified LDH (SLDH) can increase the crystallinity (Xc) of PP despite decreasing the crystallization rate in the non‐isothermal crystallization process. The migration activation energy (∆E) indicates that LDH acts as a heterogeneous nucleating agent, which is consistent with POM results. The values of ∆E and semi‐crystallization time (t1/2) reveal that the nucleation capacity of PP/LDH is greater than that of PP/SLDH, but the crystallization rate of PP/LDH is slower than that of PP/SLDH, resulting in a decrease in Xc.

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“…These results indicate that Sepiolite does not act as a nucleating agent for crystallization of HDPE. From previous studies, it was observed that Sepiolite act as a nucleating agent for polypropylene (PP) and polyamide (PA6) . The values of crystallinity show that there is no effect of Sepiolite fibers on the crystallization of HDPE up to 5% w/w.…”

Section: Resultsmentioning

confidence: 99%

“…Recently Manchanda et al . investigated the thermomechanical behavior and nonisothermal crystallization kinetics of polypropylene (PP)/Sepiolite nanocomposites and found that thermal stability, nucleation activity, and mechanical behavior of PP increased significantly upon incorporation of Sepiolite . In our recent study on HDPE/Sepiolite nanocomposites, we have investigated the influence of polarity and molar mass of the compatibilizer on morphology, mechanical, and melt extensional properties of HDPE/Sepiolite nanocomposites .…”

Section: Introductionmentioning

confidence: 99%

Polyethylene/sepiolite clay nanocomposites: Effect of clay content, compatibilizer polarity, and molar mass on viscoelastic and dynamic mechanical properties

Singh

Vimal

Sharma

et al. 2017

J of Applied Polymer Sci

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In this work, high-density polyethylene (HDPE)-based nanocomposites having different concentrations of Sepiolite (1-10 wt %) and compatibilizer, that is, PE-graft-maleic anhydride (PE-g-MA) of varying molecular weight and maleic anhydride content were prepared by melt compounding. The influence of Sepiolite amount and compatibilizer polarity and molar mass on the crystallization behavior [differential scanning calorimeter (DSC) and X-ray diffraction (XRD)], rheological properties (oscillatory rheometer) and dimensional stability [dynamic mechanical analyzer (DMA) and heat deflection temperature (HDT)] of the nanocomposites was investigated. It was found that Sepiolite did not affect the crystallization behavior of HDPE. The rheological results show that the incorporation of Sepiolite into HDPE matrix up to 10 wt % increases the complex viscosity of polymer. Storage modulus and loss modulus both in oscillatory rheometry and in DMA were highest for nanocomposite prepared using 10 wt % Sepiolite owing to the improved mechanical restrain by the dispersed phase. In the presence of compatibilizer, the values of storage modulus and loss modulus were lower as compared to uncompatibilized nanocomposites at same loading of Sepiolite. The reduction in modulus is more pronounced in composites prepared using compatibilizer of lower molar mass as compared to those prepared using higher molar mass compatibilizer.

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Effect of sepiolite on nonisothermal crystallization kinetics of polypropylene

Cited by 15 publications

References 39 publications

Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

Influence of Organo-Sepiolite on the Morphological, Mechanical, and Rheological Properties of PP/ABS Blends

Non‐isothermal crystallization kinetics of polypropylene/layered double hydroxide composites

Polyethylene/sepiolite clay nanocomposites: Effect of clay content, compatibilizer polarity, and molar mass on viscoelastic and dynamic mechanical properties

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