1、Limitless silanes
A silane coupling agent will act as an interface between an inorganic substrate (such as glass, metal or mineral) and an organic material (such as an organic polymer, coating or adhesive) to bond the two dissimilar materials.
2、Silane Coupling Agents
Many conventional coupling agents are frequently used in combination with 10-40% of a non-functional dipodal silane, where the conventional coupling agent provides the appropriate functionality for the application, and the non-functional dipodal silane provides increased durability.
3、Silane Coupling Agent
There are three basic approaches for using silane coupling agents. The silane can be used to treat the surface of the inorganic materials before mixing with the organic resin or it can be added directly to the organic resin or holistic mixing (in organic-inorganic mixture).
Silanes and Other Coupling Agents; Volume 2
Silanes are the most popular and widely used coupling agents (or adhesion pro- moters) to promote adhesion between dissimilar materials in a variety of situations, e.g. coating technology, adhesive bonding, reinforced composites, etc.
Recent Progress in Silane Coupling Agent with Its Emerging Applications
Various characterization methods, based on ASTM standard, were conducted to evaluate physical properties (water absorption and thickness swelling) and mechanical behavior (tensile, flexural, impact, hardness, and elongation-at-break) of the composites.
19022_Silane_Coupling_Agents_
Best results are obtained in an unsaturated polyester-based FRP by using a vinyl – or methacryloxy-containing silane as the silane coupling agent. Remarkable improvements are made in the mechanical strengths and electrical characteristics as well as in the appearance of FRP of an unsaturated polyester resin by using the silane coupling agent ...
Silane Coupling Agents Application Guide
Best results are obtained in an unsaturated polyester-based FRP by using a vinyl – or methacryloxy-containing silane as the silane coupling agent.
Basics of silane coupling agents, selection methods, and usage points
受発注AIエージェントSilane coupling agents are an essential component in a wide variety of industries, playing a crucial role in enhancing the performance and durability of materials by promoting adhesion between different surfaces. Understanding the basics of these agents, their selection methods, and how to use them effectively can make a significant difference in various ...
Thiophene
Download: Download full-size image Graphene powder is homogeneously dispersed in water and shows distinct Tyndall phenomenon with the assistance of the thiophene-silane coupling agent (TPSi) under tip-sonication. The combination with TPSi also further improves the adsorption capacity of graphene for Mo (VI) ions.
Silane Coupling Agents: The Molecular Bridges Transforming Material
Discover silane coupling agents from Alfa Chemistry: molecular bridges enhancing composite performance. Learn mechanisms, types (amino/vinyl/epoxy), dental applications, selection guidelines & protocols.
Abstract: Silane coupling agents are critical organosilane compounds widely utilized in materials science, electronics, automotive manufacturing, and other fields. This paper introduces methods for identifying silane coupling agents, including chemical property analysis, physical characteristic testing, and spectroscopy techniques. These approaches enable effective differentiation among various silane coupling agents, providing robust support for industrial production and scientific research.
Keywords: Silane coupling agents; Chemical properties; Physical characteristics; Spectroscopy techniques
1. Introduction Silane coupling agents are a class of high-performance organosilane compounds that form stable chemical bonds on inorganic material surfaces, enhancing adhesion, wear resistance, and corrosion resistance. the diverse variety of silane coupling agents available commercially poses challenges for accurate identification. This paper reviews several commonly used identification methods.
2. Chemical Property Analysis of Silane Coupling Agents 2.1 Infrared Spectroscopy (IR) Infrared spectroscopy analyzes compound structures by detecting absorption or emission at specific wavelengths. For silane coupling agents, functional group characteristic peaks in IR spectra aid identification. For example, methyltriethoxysilane (MTES) exhibits a Si-O-C stretching vibration peak at 1090 cm⁻¹, while phenyltrimethoxysilane (PTMS) shows a Si-C stretching vibration peak at 820 cm⁻¹.
2.2 Mass Spectrometry (MS) Mass spectrometry identifies compounds via molecular ion or fragment mass ratios. Analyzing silane coupling agents via MS provides relative molecular mass and structural information. For instance, tetramethyl orthosilicate (TMOS) displays multiple fragment ion peaks, whereas hexamethyldisiloxane (HDMDI) exhibits distinct primary and secondary peaks.
2.3 Nuclear Magnetic Resonance Spectroscopy (NMR) NMR utilizes atomic nuclei resonance frequencies to determine compound structures. In the ¹H NMR spectra of silane coupling agents, methyl (CH₃) and Si-H signal positions and intensities facilitate differentiation. For example, MTES shows methyl signals between 0.5–1.5 ppm and Si-H signals at -6.5 to -7.0 ppm.
3. Physical Characteristic Testing of Silane Coupling Agents 3.1 Viscosity Measurement Viscosity, measured using rotational viscometers, reflects liquid flow properties. Variations in viscosity among silane coupling agents correlate with molecular weight and structure. Low-viscosity agents suit spraying/brushing applications, while high-viscosity agents are ideal for bonding and sealing.
3.2 Solubility Testing Solubility, assessed via solubility curves, depends on polarity, molecular structure, and solvent properties. Polar silane coupling agents dissolve better in polar solvents, whereas non-polar agents favor non-polar solvents.
3.3 Stability Testing Stability refers to chemical property retention under specific conditions. Accelerated aging and humidity-heat tests evaluate stability. For example, high-temperature degradation of silane coupling agents reduces adhesion, necessitating heat-resistant formulations.
4. Applications of Spectroscopy Techniques 4.1 Ultraviolet-Visible Spectroscopy (UV-Vis) UV-Vis spectroscopy measures light absorption/scattering to identify compounds. By analyzing absorbance at specific wavelengths, silane coupling agent concentrations can be determined. For instance, MTES exhibits distinct absorption peaks, while PTMS lacks significant UV-Vis features.
4.2 Fluorescence Spectroscopy (FL) Fluorescence spectroscopy detects fluorescence emissions from excited molecules. Silane coupling agents containing fluorescent groups (e.g., benzimidazole) display bright emission peaks in FL spectra.
4.3 Nuclear Magnetic Resonance Spectroscopy (NMR) NMR spectroscopy reveals molecular structures via nuclear resonance. For example, TMOS’s structure is confirmed by multiplet patterns in its NMR spectrum corresponding to Si-O-C bonds.
Identifying silane coupling agents requires integrating chemical analysis, physical testing, and spectroscopy. These combined methods effectively distinguish agent types, supporting industrial and research applications. Future advancements may introduce novel techniques, expanding possibilities for silane coupling agent research and utilization.
