The difference between gas phase white carbon black and precipitation method white carbon black?

difference between 'gas phase method white carbon black and precipitation method white carbon black'A: The two use of different raw materials and production processes, gas phase white carbon black high purity, small particle size, high structural, and precipitation method white carbon black due to its production process limitations, high ion content and high water contentIn addition, the appearance of the two, surface chemical properties are also differentHere are the specific chemical reaction equations of the two:precipitation method white carbon black:gas phase method white carbon black:gas phase method white carbon black affect the performance of high temperature vulcanized silicone rubberfactors? A: Factors affecting the performance of silicone rubber include the surface area of gas-phase white carbon black, the amount of dosage and whether the surface treatment is (the water content of white carbon black can affect its strength, fluidity and transparency, etc.) and other factorsHowthe hydroxyl on the white carbon black surface is determined?A: The silicate base on the white carbon black surface is generally measured by infrared, lithium reagent and Carl Feshu reagent, in addition to thermal reanalysis, the weightlessness of white carbon black is divided into three stages, the first stage is room temperature -190 degrees C, lost is free The second stage of adsorption water, the second stage is 190-917 degrees C, lost with silicon hydroxyl formation of hydrogen bonds of adsorption water, the third stage is 917-1320 degrees C, lost is the water formed after hydroxyl contractionThe amount of hydroxyl on the surface can be calculated based on weightlessness data, and the test unit is generally represented by (a/nm2)gas phase white carbon black surface treatment and treatment agent type?A: The surface treatment of gas phase white carbon black is the chemical reaction with hydroxyl on the black surface of white carbon by using certain chemicals through a certain process, so that the treatment agent is connected to the black surface of white carbon in the form of chemical health to obtain permanent surface performanceTreatment methods generally use white carbon black and treatment agent heating method to make the treatment agent boiling (also known as wet method) and dry white carbon black pretreatment agent steam contact and reaction method (also known as dry method)At present, most foreign companies use dry continuous treatment, the disadvantage of wet method is the separation of products, purification difficulties, high cost, serious pollutionThe surface treatment agents used are generally silicone compounds, alcohols, amines and polymer graftmodification