What is the role of the wire of the two-color line `` `` ``
And now quickly put the PVC pipe into the also too late! It's dangerous to use it later! Suggestions to improve now! Or remove the sub-board from the new board! Will not damage the material! Please be careful!
10 square to wear . 16 square . 35 square . 50 square . if it is copper or turn more PVC pipe should be enlarged on the 1st
10 square to wear . 16 square . 35 square . 50 square . if it is copper or turn more PVC pipe should be enlarged on the 1st. Polyvinyl chloride (English: PolyVinylChloride, referred to as: PVC) is a use of a chlorine atom to replace polyethylene in a hydrogen atom of the polymer material. PVC is an amorphous structure of the white powder, the degree of branching is small. Industrial production of PVC molecular weight is generally in the range of 5 to 12 million, with a large polydispersity, molecular weight increases with the reduction of polymerization temperature. No fixed melting point, 80 ~ 85 ℃ began to soften, 130 ℃ into a viscous state, 160 ~ 180 ℃ began to change into a viscous flow. Its tensile strength of about 60MPa, the impact strength of 5 ~ 10kJ / m2; has excellent dielectric properties. The stability of light and heat is poor, above 100 ℃ or prolonged sun exposure, it will decompose and produce hydrogen chloride, and automatically catalyze the decomposition caused by discoloration, in practical applications must be added stabilizer to improve the stability of heat and light. PVC is very hard, can only be dissolved in cyclohexanone, dichloroethane and tetrahydrofuran and a few solvents, the organic and inorganic acids, alkali, salt are stable, chemical stability with the use of temperature rise.
