Interaction of Silane Coupling Agents with CaCO3
15 Jun 1997-Journal of Colloid and Interface Science (J Colloid Interface Sci)-Vol. 190, Iss: 2, pp 427-436
TL;DR: A study of eight silane coupling agents showed very different effect of these compounds on the mechanical properties of PP/CaCO3 composites, with bulky organofunctional groups form a caged, polycyclic, low-molecular-weight structure on the surface, while silanes with smaller groups tend to condense into open, ladder type, high-molesome-weight polysiloxane chains.
About: This article is published in Journal of Colloid and Interface Science.The article was published on 1997-06-15. It has received 120 citations till now. The article focuses on the topics: Silane & Silanes.
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TL;DR: In this paper, the surface modification of cellulosic fibres was carried out using organofunctional silane coupling agents in an ethanol/water medium, and a heat treatment (curing) was applied after reaching the equilibrium adsorption of the prehydrolysed silanes onto the cellulosa substrate.
371 citations
TL;DR: The use of multiphase, multicomponent materials is expected to grow with a larger than average rate also in the future as mentioned in this paper, and it is important to keep the interdisciplinary nature of the area since principles and techniques developed by one field may find application also in other areas.
283 citations
TL;DR: In this paper, the polyimide/barium titanate (BaTiO3) composites were successfully synthesized through a colloidal process, in which the preparing suspension of fine BaTiO 3 particles in poly(amic acid) solution, the film casting of the suspension, and the imidization with heat treatment are involved in sequence.
Abstract: The polyimide/barium titanate (BaTiO3) composites were successfully synthesized through a colloidal process. In this process, the preparing suspension of fine BaTiO3 particles in poly(amic acid) solution, the film casting of the suspension, and the imidization with heat treatment are involved in sequence. Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), thermal-gravimetric analyses (TGA) and electrometer were used to characterize the structure and properties of the obtained composites. It was found that the BaTiO3 particles in the size of 100 nm were dispersed homogeneously in the polyimide matrix without aggregation. Thermal stability of the composites could be improved with the incorporation of BaTiO3. The dielectric constant (e) and the dielectric loss (tan δ) of these composites increased with the increase of the volume fraction of BaTiO3 particles. e, tan δ was 35 and 0.0082, respectively at 10 kHz as the composite contains 50 vol% BaTiO3. Also, the dielectric properties of the composites displayed good stability within a wide range of temperature or frequency.
198 citations
Cites background from "Interaction of Silane Coupling Agen..."
...Because these absorption bands are associated with the characteristics of Si–O–Si units from the hydrolysis of silane [11,12], it was analyzed that the coupling reagent reacted efficiently onto the surface of BaTiO3....
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TL;DR: In this article, a ruthenium supported on graphite catalyst (Ru/G) for hydrogen generation from sodium borohydride (NaBH(4)) solution is prepared by a modified impregnation method.
171 citations
TL;DR: In this article, the effect of interfacial interaction on the tensile properties of polypropylene composites was evaluated by semi-empirical equations developed previously, and the results also proved the validity of the model equations applied.
Abstract: Interfacial interactions significantly influence the properties of particulate filled polymers. The adhesion between the particles and the polymer matrix depends on the size (area) of the interface and the strength of the interaction. While the former quantity is related to the specific surface area of the filler, the strength of the interaction can be modified by its surface treatment. In the current experiments polypropylene composites were prepared which contained different amounts of filler treated with eight functional trialkoxy silane coupling agents and the routinely used stearic acid, for comparison. Tensile properties of the composites were determined and the effect of interfacial interaction was evaluated by semi-empirical equations developed previously. Significant difference was detected in the effect of the various silane coupling agents. Amino functional silanes increase the strength of the interaction considerably. The other coupling agents reduce the surface tension of the filler, which leads to a decrease in the reversible work of adhesion between the filler and the polymer. These changes result in a decrease in the tensile strength of the composite. The results also prove the validity of the model equations applied. Parameter B, a measure of the strength of the interaction, was calculated for each silane coupling agent thus quantitatively characterizing their effectiveness.
157 citations
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Book•
28 Feb 1983
TL;DR: A new book that many people really want to read will you be one of them? Of course, you should be as mentioned in this paper, even some people think that reading is a hard to do, you must be sure that you can do it.
Abstract: Come with us to read a new book that is coming recently. Yeah, this is a new coming book that many people really want to read will you be one of them? Of course, you should be. It will not make you feel so hard to enjoy your life. Even some people think that reading is a hard to do, you must be sure that you can do it. Hard will be felt when you have no ideas about what kind of book to read. Or sometimes, your reading material is not interesting enough.
326 citations
258 citations
01 Jan 1985
TL;DR: The Symposium on Polymer Composites, Interfaces as mentioned in this paper was held under the auspices of the Division of Polymer Chemistry, American Chemical Society (ACS) during the annual ACS meeting in Seattle, March, 1983.
Abstract: This book is an extended version of the proceedings of the Symposium on Polymer Composites, Interfaces, which was held under the auspices of the Division of Polymer Chemistry, American Chemical Society (ACS) during the annual ACS meeting in Seattle, March, 1983. The importance of the interface in composite materials has been recognized since the inception of modern composite technology. Specifically, silane coupling agents were developed for glass fiber reinforced compOSites at a very early date. Ever since then the diversity of composite materials and the development of various surface treatment methods have led to the establishment of an "interface art." A trial-and-error approach has dominated the interfacial aspects of composite technology until very recently. With the advent of modern analytical techniques for surface characterization, it became possible to study detailed surface and interface structures. It was hoped that this symposium would catalyze such a fundamental and scientific approach in composite studies. For this reason, the symposium was structured to verify the influence of interfacial structures on the mechanical and physical performance of composites and to improve our knowledge of the microstructure of composite interfaces. As the word *composite" indicates, interdisciplinary interaction is indispensable for proper understanding of multiphase systems.
234 citations
213 citations
TL;DR: In this paper, a tracer (tritium) method was used to establish the chemisorption isotherm of stearic acid on a CaCO3 filler and the induced changes in surface properties have been studied.
162 citations