Structure and properties of polypropylene composites filled with magnesium hydroxide

Chen, Xiaolang; Yu, Jianxing; Guo, Shaoyun

doi:10.1002/app.24938

Cited by 130 publications

(97 citation statements)

References 19 publications

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“…The presence of MAH induced an increment of $1.9% of T c . A further addition of 3 wt% and 5 wt% of Si gave out an increase of $6.8% and $7.5% of T c , respectively, taking PP-MAH as reference, as reported by other authors [46].…”

Section: Morphology and Thermal Processing Windowssupporting

confidence: 53%

Novel silicon microparticles to improve sunlight stability of raw polypropylene

Cháfer

Badía

Teruel-Juanes

et al. 2015

European Polymer Journal

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a b s t r a c tOxidation of polyolefins by ultraviolet/visible irradiation is a significant limitation for their use in several technological applications. The use of high-tech additives such as silicon microparticles becomes a compositing strategy that can improve the performance of these materials at long-term service conditions. Silicon particles were added to non-additivated raw polypropylene (PP) prepared by hot melt extrusion and subjected to accelerated sunlight irradiation tests. The stability of thermal properties, mechanical performance and thermal decomposition behaviour of composites was evaluated by differential scanning calorimetry, dynamic mechanical-thermal analysis and thermogravimetry. This paper shows the potential of silicon microparticles to protect PP from degradation during both processing and accelerated sunlight irradiation. The addition of polydisperse silicon microparticles to the raw polypropylene preserved the appearance and improved the thermal behaviour, mechanical properties and thermal stability. It was found that silicon particles at 5 wt% provided a suitable protection of raw non-additivated PP against sunlight irradiation.

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Section: Morphology and Thermal Processing Windowssupporting

confidence: 53%

Novel silicon microparticles to improve sunlight stability of raw polypropylene

Cháfer

Badía

Teruel-Juanes

et al. 2015

European Polymer Journal

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“…19,23 Mechanical properties such as the tensile strength and T 10% , 10% decomposition temperature; T 25% , 25% decomposition temperature; T 50% , 50% decomposition temperature; T max , temperature of maximum decomposition rate. Table IV.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

“…Therefore, it is necessary to lower the amount by modification and/or mixing with other additives (especially those with a synergism with MH). [16][17][18][19] Significant improvements in flammability and combustion parameters were observed when MH and different types of clays were used. 20 Sepiolite has a chainlike structure with the chemical formula Si 12 Mg 8 O 30 (OH) 4 (OH 2 ) 4 8H 2 O, and it has been used for the preparation of polymer composites.…”

Section: Introductionmentioning

confidence: 95%

Flame‐retardant synergism of sepiolite and magnesium hydroxide in a linear low‐density polyethylene composite

Gul

Islam

Yasin

et al. 2011

J of Applied Polymer Sci

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A synergistic effect on flame retardancy, thermal stability, and mechanical properties was found when sepiolite was incorporated into a linear low-density polyethylene (LLDPE)/magnesium hydroxide (MH) composite. Different amounts of sepiolite (up to a maximum concentration of 15 phr) were added to a standard LLDPE/MH formulation, and vinyltriethoxysilane was used as a compatibilizer as well as a crosslinking agent. The thermal stability and the oxidation induction time increased with increasing sepiolite content in the LLDPE composites. Limiting oxygen index (LOI) results indicated an increase in LOI with the addition of sepiolite, and an LOI value of 36.5% was observed with 15 phr sepiolite in the LLDPE/MH formulation. The addition of sepiolite increased the gel content and tensile strength of all samples and lowered the elongation at break. The heat deflection, Vicat softening temperature, and hardness were also improved by the incorporation of sepiolite. This synergistic behavior of sepiolite with MH could be used in halogen-free, flame-retardant LLDPE formulations.

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“…A higher miscibility means better wetting of the polymer matrix on the particles. This implies that the viscosity decreases since the amount of particle-particle interactions decreases [7,[18][19][20][21][22][23][24]. Since the viscosity was lower for APTMS than for GPTMS, it appears that the main effect was better wetting of particles rather than the dilution effect, and that the difference in solubility parameter Dd (rather than R a ) ( Table 1) between the polymer and the coating (smallest for APTMS) described the actual miscibility best in the 11 vol% system.…”

Section: Rheologymentioning

confidence: 85%

Rheological and dynamic mechanical properties of polymer-bonded magnets based on Sm2Co17 and polyamide-12

et al. 2014

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The rheological and dynamic mechanical properties of polymer-based composites of Sm 2 Co 17 and polyamide-12 with different particle loadings, sizes, and surface treatments are reported. Sm 2 Co 17 particles were surface-treated with three different silanes: 3-glycidoxy(propyl)trimethoxysilane, 3-amino(propyl)trimethoxysilane (APTMS), and methyltrimethoxysilane (MTMS). It was shown, for the composites with untreated particles, that the viscosity and storage modulus increased with increasing filler content (0-60 vol%) and decreasing filler particle size. In addition, the glass transition temperature increased significantly and the damping decreased with increasing filler content. Of the silanes, the MTMS, which yielded only a thin surface layer, had in general the least effect on the rheological properties of the composite. The composite containing the APTMS-coated filler showed the highest storage modulus. The results give new insights on how to prepare polymer-bonded magnets with optimal process conditions (rheology) and dynamic mechanical properties, by varying the amount of particles, their size, and surface treatment.

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Structure and properties of polypropylene composites filled with magnesium hydroxide

Cited by 130 publications

References 19 publications

Novel silicon microparticles to improve sunlight stability of raw polypropylene

Novel silicon microparticles to improve sunlight stability of raw polypropylene

Flame‐retardant synergism of sepiolite and magnesium hydroxide in a linear low‐density polyethylene composite

Rheological and dynamic mechanical properties of polymer-bonded magnets based on Sm2Co17 and polyamide-12

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