Natural rubber vulcanization process is a process of natural rubber vulcanized rubber chain macromolecular chemical crosslinking reaction. Can be divided into three phases:

The first stage is the induction phase, the molecular sulfur and accelerator systems (accelerator, zinc oxide, stearic acid) to form an active intermediate compounds larger, this method further rubber molecular chain initiator to produce a radical crosslinkable .

Stage 2 is a crosslinking reaction stage, the ripple occurs between the crosslinkable radical and Molecular chains crosslinked chain.

Phase 3 is the network structure formation stage, but may occur crosslinks rearrangement and cracking reactions, post-crosslinking reaction at this stage has basically stopped, consequent mainly crosslinks rearrangement and cracking, etc. reaction (ie "reversion" reaction).

Standard vulcanization systems to produce more and more unstable sulfur crosslinks during the vulcanization process often crosslinked, it is compared with a single sulfur crosslinks often exhibit thermal instability, manifested as with the torque reaches its maximum vulcanization curve extend the curing time, the torque is gradually decreased

How to identify true and false identification of genuine silicone silicone rubber wristbands?

The difference from the look, feel methods:

1, fake silicone rubber wristbands easily deformed, and the silicone rubber will feel really good rebound, Chela permanent deformation is relatively small.

2, If the surface of the silicone rubber is really no special treatment, then hand feels will feel smoother, because there will be a layer of the surface layer of fat-like substances.

3, the silicone rubber surface is easy to stick dust, hair and the like impurities.

Burning at the comparison:

Silicone rubber strap false edge after the fire is black, silica and combustion really matter what color is white edge, a powder combustion residue.

Burning comparison:

Silicone rubber wristbands were fake fire burning, black smoke and stench. The silicone rubber wristbands really was like burning carbon, uniform flame. White smoke, and tasteless.