Epoxides are a class of compounds with a three-membered cyclic ether structure, the simplest of which is ethylene oxide. Like cyclopropane, the ring strain of epoxy compounds is la
Oct 08, 2022
Electrophilic substitution reaction refers to the reaction in which atoms or groups of atoms in a compound molecule are replaced by electrophiles.
Melamine-formaldehyde resin is a polymer obtained by the reaction of melamine and formaldehyde. The cross-linking reaction occurs during processing and molding, and the product is
Sep 30, 2022
aniline-formaldehyde resin in a strong acid medium (PH
Urea-formaldehyde resin is a polycondensation of urea and formaldehyde under the action of a catalyst (alkaline or acid catalyst) to form an initial urea-formaldehyde resin, and th
Phenolic resin is a colorless or yellow-brown transparent material, and it is often in the form of red, yellow, black, green, brown, blue and other colors with the addition of colo
Steam distillation refers to the leaching method of co-distilling plant materials containing volatile components with water, so that the volatile components are distilled with wate
The softening point mainly refers to the temperature at which the amorphous polymer begins to soften. It is not only related to the structure of the polymer, but also to the size o
Rosin acid is a tricyclic diterpenoid oxygenated compound with the chemical formula C20H30O2, and is one of the most important resin acids. It is insoluble in water, soluble in gen
Fat-solublevitamins are a class of vitamins that are insoluble in water but soluble in fat and non-polar organic solvents (such as benzene, ether, chloroform, etc.), including vita
After saponification of oil, there are still some substances such as sterols, polymer alcohols, hydrocarbons, pigments and fat-soluble vitamins that are insoluble in water but solu
Shellac is a kind of animal resin that accumulates on the branches due to the secretion of colloid due to the metabolism of shellac insects in India, Malaysia and Yunnan, China.
