What are nucleating agents?
Nucleating agents are compositions, compounds, etc., that induce the formation of polymer crystals (i.e., regulate and control crystallinity).
What are nucleating agents give example?
Nucleating agents are usually used in polymers which have slow nucleation and crystallization rates. The examples are polyethylene terephthalate and mainly polypropylene.
What is supersaturation in crystallization?
Supersaturation is a non-equilibrium, physical state in which a solution contains more solute than the equilibrium solubility allows, given conditions such as temperature and pressure of the system.
Where are microtubules nucleated?
the centrosome
In ordinary animal cells the cytoplasm is organized by a radial array of microtubules, called an aster. Aster microtubules are nucleated by the centrosome and elongate to the periphery. We investigated how asters grow in an extremely large cell, the frog egg, using microscopy of an extract system.
What is pp nucleation?
PP Nucleation High performance nucleating agents help PP processors avoid the traditional drawbacks observed with standard PP nucleation solutions, such as shrinkage and dimensional control. PP nucleating agents improves the physical properties of polypropylene to deliver improved part quality and higher Productivity.
What are nucleating agents for polypropylene processors?
High performance nucleating agents help PP processors avoid the traditional drawbacks observed with standard PP nucleation solutions, such as shrinkage and dimensional control. PP nucleating agents improves the physical properties of polypropylene to deliver improved part quality and higher Productivity. How do Nucleating Agents Work?
What is the best particulate nucleating agent?
The commonly used particulate nucleating agents include salts and minerals, such as talc, sodium benzoate, phosphate esters and other organic salts. Talc and sodium benzoate are considered to be low performance, low cost nucleants, and provide a modest improvement in strength, stiffness, HDT, and cycle time.
What are the benefits of nucleation for injection molders of PP?
Today, they can provide a much wider range of benefits to injection molders of PP. Nucleation can be used to solve many molding challenges. With nucleation, higher crystallization rates can lead to faster cycle times while simultaneously reducing shrinkage to meet dimensional specifications.