scholarly journals Surface modification of fumed silica by photo-dimerization reaction of cinnamyl alcohol and cinnamoyl chloride

2016 ◽  
Vol 27 (2) ◽  
pp. 765-772 ◽  
Author(s):  
Aki Kawamura ◽  
Haijing Liu ◽  
Chika Takai ◽  
Takashi Takei ◽  
Hadi K. Razavi ◽  
...  
Keyword(s):  
Surface Modification ◽  
Fumed Silica ◽  
Cinnamyl Alcohol ◽  
Cinnamoyl Chloride ◽  
Dimerization Reaction

Effects of Surface Modification of Mg(OH)2 with Polysiloxane Oil and Silica Additive on the Flame Retardancy and Mechanical Properties of LDPE-Mg(OH)2 Composites

2004 ◽  
Vol 847 ◽  
Author(s):  
K. Kodama ◽  
T. Hyodo ◽  
Y. Shimizu ◽  
M. Egashira
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Flame Retardancy ◽  
Fumed Silica ◽  
Flame Retardants ◽  
Oxygen Index ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Co Addition ◽  
Silica Additive

ABSTRACTComposites of low density polyethylene (LDPE) and 40 wt% Mg(OH)2 modified with several kinds of polysiloxane oils were prepared in order to evaluate the effect of the surface modification of Mg(OH)2 on the mechanical properties and oxygen index of the composites. A composite containing Mg(OH)2 modified with methylhydrogen polysiloxane oil showed an oxygen index of 23.8% O2 and an elongation of 425%. These values were superior to other composites containing Mg(OH)2 modified with other kinds of polysiloxane oils. The oxygen index could be enhanced up to 24.8% by co-addition of 5 wt% fumed silica as another flame retardant to the composite of LDPE and 35 wt% Mg(OH)2 (modified with methylhydrogen polysiloxane oil), while fixing the total amount of the flame retardants at 40 wt%.

Surface Energy of Silica Xerogels and Fumed Silica by Inverse Gas Chromatography and Inverse Liquid Chromatography

2002 ◽  
Vol 75 (5) ◽  
pp. 811-824 ◽  
Author(s):  
J. B. Donnet ◽  
Y. J. Li ◽  
T. K. Wang ◽  
H. Balard ◽  
G. T. Burns
Keyword(s):  
Gas Chromatography ◽  
Surface Modification ◽  
Liquid Chromatography ◽  
Surface Energy ◽  
Fumed Silica ◽  
Inverse Gas Chromatography ◽  
Chemical Properties ◽  
Silica Xerogels ◽  
Silica Surfaces ◽  
Physico Chemical

Abstract Inverse gas chromatography (IGC) and inverse liquid chromatography (ILC) have been used to detect the interaction energy between silicas (fumed silicas and silica xerogels) surfaces and probes molecules. The silica surfaces were modified chemically by trimethylsiloxane functions. Either IGC or ILC have detected the adsorption energy change following the surface modification. In IGC technique, the results with several probes show clearly the physico-chemical properties of the silica surfaces. ILC was developed to use bigger probe molecules which are more similar in structure to polymers. In this work, squalene, a non volatile molecule with 30 carbon atoms and several double bonds, was used in ILC to simulate elastomer molecules.

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