A Comprehensive Review on Processing, Development and Applications of Organofunctional Silanes and Silane-Based Hyperbranched Polymers

Abstract

Since the last decade, hyperbranched polymers (HBPs) have gained wider theoretical interest and practical applications in sensor technology due to their ease of synthesis, highly branched structure but dimensions within nanoscale, a larger number of modified terminal groups and lowering of viscosity in polymer blends even at higher HBP concentrations. Many researchers have reported the synthesis of HBPs using different organic-based core-shell moieties. Interestingly, silanes, as organic-inorganic hybrid modifiers of HBP, are of great interest as they resulted in a tremendous improvement in HBP properties like increasing thermal, mechanical and electrical properties compared to that of organic-only moieties. This review focuses on the research progress in organofunctional silanes, silane-based HBPs and their applications since the last decade. The effect of silane type, its bi-functional nature, its influence on the final HBP structure and the resultant properties are covered in detail. Methods to enhance the HBP properties and challenges that need to be overcome in the near future are also discussed.

Physical and Chemical Properties of High-Temperature Silicone-Based Polymer Coatings Applied on Different Surface Roughnesses

“…In addition to the mechanical adhesion, chemical interactions are generally responsible for the adhesion of silicon polymers [20]. The chemical bonding between Si-polymer and substrates takes place mostly by hydrolysis and condensation reactions [20,21].…”

“…Previous studies on silicone-based coatings included the type of silicone resin for the long-term heat resistance of the coating [3], adhesion properties, variety of precursors and polymer-to-ceramic conversion of silicone-based coatings [20], chemical properties of silane-based coatings [21], flake ZnAl alloy as an effective pigment in silicate coatings for the corrosion protection of steel [22], and the interface properties between water-based inorganic zinc silicate coating modified by organosilicon and iron substrate [11].…”

Enhanced mechanical properties and environmental stability of polymer-bonded magnets using three-step surface wet chemical modifications of Nd–Fe–B magnetic powder

“…The helical structure and presence of organic groups within these bonds contribute to reduced intermolecular forces, leading to decreased surface tension and enhanced water repellence. Coating agents with the general formula R–Si−(OR') n , where R and R′ represent alkyl groups, and n is either 3 or 4, exhibit promising potential [ 13 ]. Applying a monolayer of the coating agent onto the surface of the powder offers several advantages.…”

Synthesis, Antibacterial Activity, and Cytotoxicity of Azido-Propargyloxy 1,3,5-Triazine Derivatives and Hyperbranched Polymers

“…The sizes of macromolecules vary from several to tens of nanometers and are characterized by a high density of functional groups, low viscosity, and high solubility compared to linear and branched polymers of a similar structure [7]. A large number of functional terminals allow them to modify HBPs to tune their physicochemical properties or construct complex molecular structures of the core-shell type [8][9][10]. Despite the similarity of the structure and properties of HBP with dendrimers, their synthesis is much simpler to scale [11].…”