The effect of hybrid nanoparticle with silica sol as the supporter on the crystallization behavior and mechanical properties of isotactic polypropylene

Li, Juan; Qin, Shuhao; He, Wentao; Xiang, Yushu; Zhang, Qin; Zhang, Kai; Zhou, Ying; Yu, Jianxing

doi:10.1515/polyeng-2014-0243

Cited by 5 publications

(5 citation statements)

References 32 publications

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“…In their work, Juan et al (58) studied the effect of Silica Sol (KSol) nanoparticules on the thermal and crystallization behavior of isotactic PP (iPP). Their DSC cooling thermograms clearly showed that the addition of KSol and 2,2 ′ -methylene-bis (4,6-di-tert-butylphenol) phosphate (MDBP-POOH)-modified Silica Sol (PKSol) could increase the crystallization temperature of iPP, from 116.4°C to 118.8°C and 120.81°C, respectively.…”

Section: Effect On Thermal Characteristicsmentioning

confidence: 99%

Reinforcement of recycled PP polymers by nanoparticles incorporation

Zdiri

Elamri

Hamdaoui

et al. 2018

Green Chemistry Letters and Reviews

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Recycling process seems to be the most efficient way to reduce ecological impacts of used polymers. Nevertheless, the properties of the recycled PP polymer are proved to be insufficient during its reuse, particularly with regard to its thermo-mechanical and rheological behaviors. The incorporation of nanoparticles as fillers into polymer matrix seems to be one of the most successful solutions to upgrade recycled PP polymer. This paper presents an overview on the application of different nanofillers such as clay, calcium carbonate (CaCO 3), Silica (SiO 2), Zinc Oxide (ZnO), carbon black (CB), carbon nanotubes (CNT), antioxidizers and others into recycled PP matrix. Literature works on the effects of nanofillers on obtained nanocomposites are extensively studied. The first section deals with PP recycling and its impact on thermal, mechanical and rheological properties of the polymer. Then, the second part summarizes recent studies on the effects of nanoparticles incorporation on thermo-mechanical and rheological properties of recycled PP. Finally, recyclability of PP-based nanocomposites is discussed.

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Section: Effect On Thermal Characteristicsmentioning

confidence: 99%

Reinforcement of recycled PP polymers by nanoparticles incorporation

Zdiri

Elamri

Hamdaoui

et al. 2018

Green Chemistry Letters and Reviews

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“…The crude MDBP‐POOH immobilized silica sol nanoparticles were synthesized by KH550 as the linker, as illustrated in Scheme . The experimental details were described in our previous work . In order to mask the interference of other substances and further prove the effect the silica‐based nucleating agent for iPP, the crude product was purified by centrifugation at room temperature in the following two steps.…”

Section: Methodsmentioning

confidence: 99%

“…In the previous work, a silica sol‐based nucleating agent for iPP was prepared by supporting aromatic phosphate on silica sol via chemical action with γ‐aminopropyltrimethylsilane (KH550). The hybrid nanoparticle was proved to be an effective nucleating agent of iPP . Through intense research, we found that directly compounding the aqueous silica sol‐based nucleating agent with iPP would corrode the screw acutely during the process of melt extrusion, which limited the application of silica sol‐based nucleating agent in iPP.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, an easily dispersed silica‐based nucleating agent for iPP was obtained by two steps: a small amount of 2,2′‐methylene‐ bis (4,6‐ditertbutylphenol) phosphate (MDBP‐POOH) was supported on the silica sol with KH550 as the linker as reported in our previous work , and the obtained suspension was further processed by spray‐drying. The obtained particles were characterized by SEM, Fourier‐transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA).…”

Section: Introductionmentioning

confidence: 99%

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A novel silica‐based nucleating agent for polypropylene: Preparation, characterization, and application

Long

et al. 2015

Vinyl Additive Technology

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Inorganic silica is widely used as nucleating agents for isotactic polypropylene (iPP), and to achieve a better effect, the amount of addition is generally higher than 5 wt%. A novel silica‐based nucleating agent (SPKSol) was prepared by two steps: aromatic phosphate (MDBP‐POOH) was first supported on the silica sol via chemical reaction with γ‐aminopropyltrimethylsilane (KH550) as the linker, and the obtained product (PKSol) was further processed by spray‐drying. Fourier‐transform infrared spectrometry and thermogravimetric analysis confirmed the incorporation of MDBP‐POOH on the silica sol. The results demonstrated a spherical particle with an average size of 5 μm, and a slit‐shaped pore structure was formed from the originally formed nano‐sized particles of PKSol after the spray‐drying process. Transmission electron microscopy showed that the SPKSol was well‐dispersed in the iPP matrix. Incorporating a very small amount of SPKSol (0.2 wt%) can effectively increase the crystallization temperature and improve the mechanical properties of polypropylene. In addition, the addition of SPKSol could even shift the haze of polypropylene to a lower value, obviously lower than that with PKSol as the nucleating agent. The preparation, characterization of SPKSol, and their application in iPP composites were explored in detail. J. VINYL ADDIT. TECHNOL., 24:58–67, 2018. © 2015 Society of Plastics Engineers

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“…The products under the trade names NA-11 and NA-21 are typical examples of organic phosphate nucleating agents, which are very important type-α phase NAs for PP. The excellent nucleation effect of the organic phosphate has attracted widespread attention in academic circles [24][25][26][27][28][29]. It has been shown that ADK STAB NA-11 gave the high Tc and stiffness to PP, which was attributed to the optimal epitaxial match between the PP helix and the organophosphate molecules [30,31].…”

Section: Introductionmentioning

confidence: 99%

The Application of Organic Phosphate Nucleating Agents in Polypropylene with Different Molecular Weights

Liang

Gao

et al. 2021

Crystals

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Two kinds of organic phosphate nucleating agent (NA-11 and NA-21) were used in PP with different molecular weights through the melt extrusion method. The dispersibility of the nucleating agents in PP, and the effect of the nucleating agents on the molecular weight, rheological behavior and crystallization behavior of PP were investigated. SEM and TEM analysis showed that the average radius of the dispersed particles (nucleating agents) was larger in LPP than that in HPP. The good dispersion of NA-21 also created more nucleation embryos for the adsorption of polypropylene molecules than the agglomerated NA-11. The gel permeation chromatography (GPC) analysis showed that the average molecular weight of HPP and LPP both decreased with the addition of a nucleating agent. The rotational rheometer and capillary rheometer analysis showed that the effect of NA-21 on reducing intermolecular entanglement was more significant, whether in HPP or LPP. The addition of NA-21 had less elastic energy storage and better flow stability, and could be processed at a higher speed. Simultaneously, the relaxation time in the blends with LPP was shorter than that with HPP. It was found that the crystallinity and nucleation efficiency of HPP/nucleating agent blends increased remarkably, while there was a barely perceptible increase in LPP/nucleating agent blends.

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The effect of hybrid nanoparticle with silica sol as the supporter on the crystallization behavior and mechanical properties of isotactic polypropylene

Cited by 5 publications

References 32 publications

Reinforcement of recycled PP polymers by nanoparticles incorporation

Reinforcement of recycled PP polymers by nanoparticles incorporation

A novel silica‐based nucleating agent for polypropylene: Preparation, characterization, and application

The Application of Organic Phosphate Nucleating Agents in Polypropylene with Different Molecular Weights

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