molecular weight modifier
Synonyms in English
molecular weight modifier
chemical property
It has many kinds, including aliphatic thiols, xanthate disulfide, polyphenols, sulfur, halides and nitroso compounds, and is widely used in free radical polymerization reactions
Product introduction and features
Molecular weight regulator refers to the addition of a small amount of material with large chain transfer constant in the polymerization system. Because the chain transfer ability is particularly strong, only a small amount of add can significantly reduce the molecular weight, but also by adjusting the dosage to control the molecular weight, so this kind of chain transfer agent is also called molecular weight regulator. For example, dodecyl thiols are often used as molecular weight regulators in acrylic fiber production. Molecular weight regulator refers to the substance that can control the molecular weight of polymer and reduce the chain branching of polymer. Its characteristic is that the chain transfer constant is very large, so a small amount can effectively reduce the molecular weight of polymer, which is conducive to the post-processing and application of polymer. Regulator for short, also known as polymerization regulator
use
In the emulsion polymerization of synthetic rubber, usually use aliphatic thiols (such as dodecarbothiol,CH3 (CH2) 11SH) and disulphide diisopropyl xanthogenate (that is, the regulator butyl)C8H14O2S4, especially aliphatic thiols, and speed up the reaction; In olefin coordination polymerization, hydrogen is used as molecular weight regulator.
package and transport
B. This product can be used,25KG, 200KG,1000KG, barrel.
C. Store sealed in a cool, dry and ventilated place indoors. Containers should be tightly sealed after each use before use.
D. This product should be sealed well during transportation to prevent moisture, strong alkali and acid, rain and other impurities from mixing.
