If you are in a hurry, you can heat it properly and it will solidify in a few minutes.
PVC: PVC was discovered by V. Regnaud of the United States as early as 1835. When it is irradiated by sunlight, it will produce a white solid, namely PVC.
PVC was discovered twice in19th century, once by Henry Victor Raignault in 1835 and once by Eugen Baumann in 1872. In both cases, the polymer appears in a vinyl chloride beaker placed in the sun and becomes a white solid.
At the beginning of the 20th century, Russian chemist Ivan Ostromislensky and German chemist Fritz Klatte tried to use PVC for commercial purposes at the same time, but the difficulty was how to process this hard and sometimes fragile polymer.
19 12 years, German Fritz Klatte synthesized PVC and applied for a patent in Germany, but a suitable product could not be developed before the patent expired.
References:
Baidu encyclopedia-PVC