PVC is a white powder with an amorphous structure, low branching degree, and a relative density of about 1.4. Its glass transition temperature is between 77~90°C, and it begins to decompose around 170°C [1]. It has poor stability to light and heat; above 100°C or after prolonged exposure to sunlight, it decomposes, producing HCl, and further auto-catalytic decomposition occurs, leading to discoloration and a rapid decline in physical and mechanical properties. In practical applications, stabilizers must be added to enhance its stability against heat and light.