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Industry news
position: > News > Industry news

What is the vulcanization of rubber

date: 2016-12-06 source: Century creation

  The word "vulcanization process (Curing)" commonly used in the rubber industry, occupies an important position in the rubber chemicals. Rubber vulcanization is by chemical crosslinking effect between rubber molecules will basically assumes the plasticity of raw rubber into elastic and dimension stability of the product, vulcanized rubber physical properties after the stability, use temperature scope. Rubber vulcanization (crosslinked) between the molecular chain reaction ability depends on its structure. Unsaturated of diene rubber (such as natural rubber, styrene-butadiene rubber and nitrile rubber, etc.) containing unsaturated double bond, the molecular chain with sulfur, phenolic resin, such as organic peroxide by replacing or addition reaction form intermolecular crosslinking. Saturated rubber generally have a certain energy of free radicals, such as organic peroxide crosslinking and high-energy radiation. Rubber containing special functional groups (e.g., chlorosulfonated polyethylene, etc.), through a variety of functional groups and established material specific form crosslinking reaction, such as rubber of the sulfonamide base through the reaction with metal oxide, amine and crosslinking.
  Rubber vulcanization principle
  , soft rubber is heated, cooled to harden and crisp, not easy molding, easy to wear and tear, soluble in organic solvent such as gasoline, intramolecular has a double bond, easy addition reaction, easy to aging.
  , to improve the performance of the rubber products, production have to be a series of processing of raw rubber, under certain conditions, to make the raw rubber and rubber vulcanizing agent produces chemical reaction, make its by the linear structure of the macromolecular crosslinking become a three-dimensional reticular structure of large molecules, so that the rubber material with high strength, high elasticity, high wear resistance, corrosion resistance, etc. Excellent properties. This process is called rubber vulcanization.
  Vulcanization process, generally divided into four stages, induced pre sulfur - is sulfide - sulfur. To achieve this reaction, must plus energy to curing temperature, and then let the rubber insulation in the vulcanizing temperature range complete curing reaction.


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