PVC is a white powder with an amorphous structure. The degree of branching is small, the relative density is about 1.4, the glass transition temperature is 77~90℃, and it starts to decompose at about 170℃. The stability to light and heat is poor, above 100℃ or after a long time. Sun exposure will decompose to produce hydrogen chloride, which will further autocatalyze the decomposition, causing...