There are three common methods for toughening modification of nylon 6: one is blending with polyolefin and elastomer; the other is blending high-toughness engineering plastics; the third is toughening of inorganic particles, which are derived from four kinds of toughening modification Sexual mechanism.

1. Crack branching and termination. Nylon 6 and rubber and other toughener blends cracked in the matrix under the impact of impact. The cracks branched during the expansion process. The tip ends with rubber and stops, preventing the cracks from further converting into cracks, thereby improving the toughness of the material.

Second, the multiple silver streak mechanism. In the nylon 6 toughened rubber blending system, the rubber particles play a role in stress concentration, and the largest force is applied near the equator perpendicular to the stress direction, causing the generation of silver streaks. During the expansion of the silver streak, another rubber particle or silver streak will be terminated. The presence of a large amount of silver streaks and the absorption of impact energy have greatly improved the toughness of the blend.

3. Shear yield mechanism. At the moment of tensile or impact fracture, the nylon 6 toughened blend generates a high temperature at the cross-section that reaches above the glass transition temperature Tg of the matrix. When the matrix fracture type changes, it produces plastic flow. The matrix shear yields and dissipates a large amount of impact energy. The toughness is greatly improved.

4. Cavitation mechanism. The nylon 6 toughened blend fractures under the action of three-dimensional tensile stress to produce spherical cavitation holes. Shear yielding occurs during the cavity process, causing multiple silver streaks in the matrix. The blending strength of the blend is significantly improved and brittleness occurs. Change in resilience.

Wuxi Jiahong Plastic's nylon 6 toughened modified products and other modified engineering plastic products have 20 years of production and R&D production experience. Customized, free samples or field visits are welcome.