Surface treatment of CaCO<sub>3</sub>with a mixture of amino- and mercapto-functional silane coupling agents and tensile properties of the rubber composites

Tsutsumi, Ryota; Sasaki, Tokio; Hashiguchi, Chisato; Yamazaki, Ryota; Fujii, Syuji; Nakamura, Yoshinobu; Fujiwara, Kazuko; Hikasa, Shigeki

doi:10.1080/09276440.2018.1439629

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…The sufficient polycondensation of SCAs improves the mechanical properties of filled composite. Calcium carbonate (CaCO 3 ) has no hydroxy group, which reacts with alkoxy group in SCA, so it has no reinforcement effect of rubber 19 . In our previous report, 19 the reinforcement of IR by the incorporation of CaCO 3 particles was investigated.…”

Section: Resultsmentioning

confidence: 99%

“…Calcium carbonate (CaCO 3 ) has no hydroxy group, which reacts with alkoxy group in SCA, so it has no reinforcement effect of rubber 19 . In our previous report, 19 the reinforcement of IR by the incorporation of CaCO 3 particles was investigated. For this purpose, CaCO 3 particles were treated with a mixture of amino‐ and mercapto‐functional SCAs with trialkoxy structure.…”

Section: Resultsmentioning

confidence: 99%

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Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Nakamura

Tsutsumi

Hashiguchi

et al. 2021

J of Applied Polymer Sci

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In the surface treated inorganic particles with silane coupling agent (SCA), chemisorbed and physisorbed molecules are present in the treated layer. Increasing the amount of chemisorption by increasing the molecular weight of SCAs was investigated. Oligomers formed via self‐condensation during storage more than 10 days at room temperature for 3‐methacryloxypropyltrimethoxysilane‐treated silica particles. Monomeric SCA evaporates easily by heating. The oligomers restrict evaporation, and heating increases the chemisorption. The influence of molecular weight of SCA was investigated. In the case of amino group, the amount of chemisorbed was greater for aminoethylaminooctyltrimethoxysilane with high molecular weight than for 3‐aminopropyltriethoxysilane. For SCAs with hydrocarbon chains, the amount of chemisorption was lower for both low molecular weight molecules and decyltrimethoxysilane (D) with a high molecular weight. For fluorocarbon chains, the amount of chemisorption was lower for low molecular weight molecules, whereas it increased significantly by heating for high molecular weight type of 1H,1H,2H,2H‐heptadecafluorodecyltriethoxysilane (F). Wide‐angle X‐ray diffraction analysis of F‐treated silica particles showed that the fluorocarbon chains formed an ordered structure. There was no such indication for the D‐treated system. This ordered structure seems to influence on higher chemisorption for F‐treated systems.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Nakamura

Tsutsumi

Hashiguchi

et al. 2021

J of Applied Polymer Sci

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“…Surface interactions and other properties of CaCO 3 could be improved with various methodologies by using different types of coupling agents containing organic or inorganic ones [19][20][21].…”

Section: Research Highlightmentioning

confidence: 99%

Experimental and computational study of thermal behavior of PVC composites based on modified eggshell biofiller for UPVC product

Khaleghi

2021

J Polym Res

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During the last years, green composites have been used as alternative compounds widely used thermoplastic such as Polyvinyl chloride (PVC) products. This semi-empirical study aims to investigate efficient biofiller prepared from waste chicken eggshell (ES), and zinc oxide (ZnO) to be used in Polyvinyl chloride (PVC) matrix for produce safe products. Prepared composite samples were characterized by X-ray pattern, and IR spectroscopy. Thermal properties of these composites were also examined with the help of Thermogravimetric Analysis (TGA/DTG) and the Differential Scanning Calorimetry (DSC) analysis. The FTIR spectra of samples confirmed structures of the ZnO and CaCO 3 in eggshell powder. In addition, X-ray diffraction analysis of samples confirmed the formation of a hexagonal wurtzite structure in ZnO, and calcite form in the chicken eggshell (ES). Thermal results showed that addition of 5wt.% EZn biofiller could significantly improve thermal stability of the composites. The presence of 5wt.% of inorganic biofiller enhanced the rapidest decomposition temperature and the maximum decomposition rate by 5.6 and 1.5%, respectively. At high temperature, a compact char formed on the surface of the composites, obstructing the thermal degradation of the polymer matrix. In addition, studied samples were modeled by theoretical calculations based on the DFT/B3LYP/LanL2DZ method to gain more information aboat overall properties, mechanism, and intermolecular interactions from examined composites. Interesting comparable results and good consistency were found between experimental and the calculated results.

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“…Gao et al [17] designed polyurethane (PU)/CaCO 3 nanocomposites through the in situ polymerizations of calcium carbonate modified with polypropylene glycol phosphate, which significantly improved the thermal stability. Notably, the modification of nanoparticles mainly uses nonnatural green substances such as silane coupling agents [18], surfactants [19] and organic polymers [20].…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of environmentally benign waterborne polyurethane composites from sodium-alginate-modified nano calcium carbonate

Yang¹,

Pan²,

Li³

et al. 2022

Nanotechnology

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Well-dispersed inorganic nanoparticles in organic polymers are critical in the preparation of high-performance nanocomposites. This study prepared a series of waterborne polyurethane (WPU)/calcium carbonate nanocomposites using the solution blending method. Next, FT-IR, TG-DTG and XRD tests were carried out to confirm that the biopolymer sodium alginate (SA) was successfully encapsulated on the surface of the calcium carbonate nanoparticles, and that SA achieved satisfactory surface modification of the calcium carbonate nanoparticles. The Zeta and ultraviolet (UV) absorbance test results reveal that SA-modified nano calcium carbonate(MCC) had good dispersion stability in water. The effects of the MCC dosage on the composite mechanical properties, thermal stability, and cross-sectional morphology observed by scanning electron microscopy (SEM), and the water resistance of the nanocomposite were investigated. The results reveal that the incorporation of 3wt% of MCC in WPU had stable distribution, which led to a 54% increase in the tensile strength of the nanocomposite, while maintaining excellent elongation at break (2187%) and increasing the maximum decomposition temperature to 419.6 °C. Importantly, the improved water resistance facilitates the application of this environmentally benign composite material in humid environments.

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Surface treatment of CaCO₃with a mixture of amino- and mercapto-functional silane coupling agents and tensile properties of the rubber composites

Cited by 7 publications

References 17 publications

Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Experimental and computational study of thermal behavior of PVC composites based on modified eggshell biofiller for UPVC product

Preparation and properties of environmentally benign waterborne polyurethane composites from sodium-alginate-modified nano calcium carbonate

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Surface treatment of CaCO3with a mixture of amino- and mercapto-functional silane coupling agents and tensile properties of the rubber composites

Cited by 7 publications

References 17 publications

Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Increasing chemisorbed silane coupling agents in surface‐treated layer of silica particles

Experimental and computational study of thermal behavior of PVC composites based on modified eggshell biofiller for UPVC product

Preparation and properties of environmentally benign waterborne polyurethane composites from sodium-alginate-modified nano calcium carbonate

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Surface treatment of CaCO₃with a mixture of amino- and mercapto-functional silane coupling agents and tensile properties of the rubber composites