1、Mechanical properties of PVC concrete and mortar modified with silane

This study investigates the surface modification of waste polyvinyl chloride (PVC) particles with encapsulated silane coupling agents (SCA) to improve the performance of PVC concrete and mortar.

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 Agents

What are Silane Coupling Agents? Silane coupling agents are compounds whose molecules contain functional groups that bond with both organic and inorganic materials. A silane coupling agent acts as a sort of intermediary which bonds organic materials to inorganic materials.

4、Mechanical Properties of PVC Concrete and Mortar Modified

The following conclusions were drawn from a study of the mechanical properties and microstructure of concrete and mortar containing PVC particles modified with silane coupling agent (SCA) and unmodified PVC particles:

Silane Coupling Agent

Silane coupling agents are primarily used in reinforced plastics and electric cables composed of crosslinked polyethylene. Other uses include resins, concrete, sealant primers, paint, adhesives, printing inks and dyeing auxiliaries.

Silane Coupling Agent

Silane coupling agents are primarily used in reinforced plastics and electric cables composed of crosslinked polyethylene. Other uses include resins, concrete, sealant primers, paint, adhesives, printing inks and dyeing auxiliaries.

How to Apply and Select Coupling Agents in PVC Composites?

In pressure pipe applications, silane coupling agents like γ-MPS (1 phr) significantly improve the bond between CaCO₃ and PVC. This raises tensile strength from 35 MPa to 42 MPa and reduces failure in hydrostatic pressure tests by 30%.

Adhesion Promoters: Silane Coupling Agents

Any silane coupling agent with three alkoxy groups on silicon should bond equally well to an inorganic substrate, but matching of the organofunctional group on silicon with the polymer type of the resin to be bonded will dictate which silane coupling agent should be used in a particular application.

Effect of triazine based silane coupling agent modified LDH on the

First, a triazine-based silane coupling agent (TSCA) was synthesized through the reaction of 3-aminopropyl tri-ethoxy silane and cyanuric chloride. Then, zinc/aluminum layered double hydroxide (LDH) was modified by a synthesized TSCA to prepared TSCA-LDH.

Why Are Coupling Agents Important in PVC Formulations?

In this article, I’ll explain how coupling agents work in PVC, introduce common types used in compounding, and show how they improve mechanical and thermal properties in industrial applications.

In modern industry, plastic materials have permeated every aspect of our lives. Among them, polyvinyl chloride (PVC) is widely popular due to its excellent mechanical properties, chemical stability, and cost-effectiveness. to enhance PVC's performance, such as temperature resistance, wear resistance, and adhesion to metals or other plastics, a series of measures must be taken. Silane coupling agents, as critical surface modifiers, play a vital role in improving PVC's properties. This article explores the importance and applications of silane coupling agents in the manufacturing and use of PVC.

1. Basic Concept of Silane Coupling Agents

Silane coupling agents are organic compounds containing silicon atoms, typically existing in the form of siloxanes. These compounds can react chemically with various materials, including plastics, rubbers, and coatings. Their primary function is to improve the interfacial properties of these materials, enhancing their bonding strength to the substrate and thereby upgrading the performance of the final products.

2. Impact of Silane Coupling Agents on PVC Performance

2.1 Improved Adhesion

Silane coupling agents significantly enhance the adhesive strength between PVC and other materials by forming chemical bonds. This is particularly effective when blending PVC with metals or other plastics, as silane coupling agents bridge the interfaces of different materials, reducing gaps and improving the mechanical properties and durability of composite materials.

2.2 Enhanced Heat Resistance

The silicon atoms in silane coupling agents can bind with polymer chains, creating a three-dimensional cross-linked network structure. This structure improves PVC's thermal stability and aging resistance. Under high-temperature conditions, silane coupling agents help maintain PVC's physical and chemical properties, extending its service life.

2.3 Increased Wear Resistance

By strengthening the chemical bonding on the PVC surface, silane coupling agents effectively improve its wear resistance. In practical applications, such as in flooring materials or automotive parts, silane coupling agents significantly extend the lifespan of PVC products and reduce maintenance costs.

3. Applications of Silane Coupling Agents in PVC Production

3.1 Pre-Polymerization Treatment

During PVC production, silane coupling agents can be incorporated into the resin via pre-polymerization. This approach not only stabilizes siloxane bonding during synthesis but also optimizes the physical and chemical properties of the final product.

3.2 Post-Treatment Techniques

Beyond pre-polymerization, silane coupling agents can also be applied to PVC products through post-treatment. For example, during coating or laminating processes, they can be directly added to the PVC matrix or mixed with resins as auxiliary additives.

4. Future Development Directions of Silane Coupling Agents

As technology advances, research and application of silane coupling agents continue to evolve. In the future, researchers may develop more specialized silane coupling agents to enhance their effectiveness in specific fields. Additionally, combining silane coupling agents with other modifiers or additives to achieve comprehensive surface modification will become a key focus of research.

As an effective surface modifier, silane coupling agents are crucial for upgrading PVC product performance. By improving adhesion, heat resistance, and wear resistance, silane coupling agents not only enhance PVC's overall performance but also expand its application prospects in broader fields. With ongoing research and technological maturation, silane coupling agents are poised to become an indispensable component in the processing of PVC and other plastic materials.