As an important thermosetting resin, epoxy resin (Epoxy Resin, EP for short) has been widely used in coatings, adhesives, composites and other fields because of its unique chemical structure and excellent properties, such as high strength, chemical resistance and good electrical insulation.
However, pure epoxy resins also have some inherent disadvantages, such as high brittleness and poor impact resistance, which limit their applications in some high-end fields. Therefore, the modification of epoxy resin to enhance its performance has become one of the hot spots in materials science research.
1、Physical modification method
Physical modification is mainly done by adding fillers, tougheners or blending with other polymer materials in epoxy resin to improve the performance.
Adding fillers: fillers are one of the most commonly used physical additives in epoxy resin modification. By adding inorganic or organic fillers, such as alumina, wollastonite, glass beads, etc., not only can reduce the cost of epoxy resin, but also significantly improve its mechanical properties, thermal properties and dimensional stability. The addition of fillers can reduce the shrinkage of the resin, improve the hardness and abrasion resistance, while reducing the coefficient of thermal expansion and increasing thermal stability.
Blending modification: Blending epoxy resin with other polymer materials such as rubber and thermoplastic resin is another effective physical modification method. For example, the epoxy resin and rubber elastomer blending, can significantly improve the toughness and impact resistance of epoxy resin. This is because the rubber elastomer in the epoxy resin to form a “sea island” structure, effectively dispersing and absorbing the impact energy, reducing the expansion of cracks.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.