Double Resonance NMR Echo Spectroscopy of Aluminosilicates

Ba, Yi; Ratcliffe, C. I.; Ripmeester, John A.

doi:10.1002/(sici)1521-4095(200004)12:8<603::aid-adma603>3.0.co;2-r

Cited by 12 publications

References 16 publications

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Solid‐StateNMRSpectroscopy

Hunger

Wang

2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Interactions of Nuclear Spins in Solids Experimental Techniques of Solid‐State NMR Spectroscopy Preparation of Catalyst Samples for Solid‐State NMR Spectroscopy NMR Investigations of Catalyst Frameworks NMR Investigations of Heterogeneously Catalyzed Reactions Conclusions

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Solid‐StateNMRSpectroscopy

Hunger

Wang

2008

Handbook of Heterogeneous Catalysis

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Preparation and characterization of polysiloxane‐acrylate latexes with MPS‐PDMS oligomer as macromonomer

Yan

Qiu

2009

J of Applied Polymer Sci

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The latexes of polysiloxane and acrylate with methacryloxypropyl trimethoxysilane (MPS)-polydimethylsiloxane (PDMS) oligomer as macromonomer and Gemini surfactant as coemulsifier were prepared by emulsion copolymerization and characterized by 1 H-nmr, gel-permeation chromatography (GPC), FTIR, x-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM).First, the oligomer of MPS-PDMS (SiAOASi chain length ¼ 24) were synthesized by the hydrolysis of MPS and the ring-opening polymerization of octamethyl tetracyclosiloxane (D 4 ), the 1 H-NMR and FTIR spectra indicated that when the reaction time was prolonged to 2 h, more than 90% of ASi (OCH 3 ) 3 groups were hydrolyzed; Then, the emulsion polymerization was performed with the oligomer as macromonomer and Gemini Surfactant as coemulsifier, the result of FTIR indicated that almost all the macromonomer had been exhausted because there was no C¼ ¼C characteristic peaks in the spectrum. XPS investigation of the latexes showed that with the increase of siloxane content, more and more polysiloxane occupied the outer layer of the membrane, which agreed well with the conclusion of contact angle and AFM measurements. With Gemini surfactant as coemulsifier in the system, the PDMS content in the system could reach to 50%, which was far higher than the other reported value.

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Synthesis and characterization of a novel silicone containing vinylic macromonomer and its uses in the preparation of poly (silicone‐co‐styrene‐co‐butylacrylate) with montmorillonite nanocomposite emulsion

Naghash

Hajati

2011

J of Applied Polymer Sci

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A new silicone containing macromonomer, 4-(methacrylamido) phenoxy polymethylhydrosiloxane (4-MPMHS) with a vinyl group, was successfully synthesized. Then poly (silicone-co-styrene-co-butylacrylate) with montmorillonite, P (Si-co-St-co-BA) with MMT nanocomposite emulsion was prepared by in situ intercalative emulsion polymerization of styrene (St), butyl acrylate (BA), and 4-MPMHS, in the presence of organic modified montmorillonite (OMMT) with different OMMT contents (0, 0.5, 1.0, 1.5, and 2 wt %). Potassium persulphate (KPS) was used as an initiator and sodium lauryl sulfoacetate (SLSA) and nonyl phenol ethylene oxide-40 U (NP-40) were used as anionic and nonionic emulsifiers, respectively. The resulting macromonomer was characterized by elemental analysis, Fourier transformer infrared (FT-IR), proton ( 1 H NMR), and carbon ( 13 C NMR) nuclear magnetic resonance spectroscopes. The OMMT was characterized by FT-IR and X-ray diffraction (XRD). The nanocomposite emulsions were characterized by using Fourier Transform infrared spectroscopy (FT-IR), laser light scattering, and surface tension method. Thermal properties of the copolymers were studied using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) and then the effects of OMMT percent on the water absorption ratio and drying speed were examined. Results showed that OMMT could improve the properties of emulsion. In other words, the properties of nanocomposite emulsions were better when compared with those of the silicone-acrylate emulsion. The property of nanocomposite emulsion containing 1 wt % OMMT was the best one, and the following advantages were obtained: smaller particle size, faster drying speed, smaller surface tension, and improved water resistance by the incorporation of OMMT.

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Double Resonance NMR Echo Spectroscopy of Aluminosilicates

Cited by 12 publications

References 16 publications

Solid‐StateNMRSpectroscopy

Solid‐StateNMRSpectroscopy

Preparation and characterization of polysiloxane‐acrylate latexes with MPS‐PDMS oligomer as macromonomer

Synthesis and characterization of a novel silicone containing vinylic macromonomer and its uses in the preparation of poly (silicone‐co‐styrene‐co‐butylacrylate) with montmorillonite nanocomposite emulsion

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