The Detrimental Influence that Dissolved Polystyrene Plastic Imposes on Our Health
Some macromolecules, like polystyrene, polyethylene and polypropylene, are not toxic, but the residual monomers and additives in them are very toxic.
Residual monomers are unavoidable in the synthesis of any polymer. The only difference is that the amount of residual monomers can be large or small among the different polymers. Therefore, we should be careful with some polymers with toxic monomers. For example, the performance of polyurethane is so excellent, but it is rarely used to pack food. The main reason is that isocyanate is poisonous. When it comes to the plastic that has been criticized for the monomer problem, PC and the bisphenol A are worth noting. Polystyrene has also been questioned due to the problem of monomer residues. Its monomer is styrene, which has a certain degree of toxicity. The carcinogen is classified as 2B, which means it may be carcinogen; so from this perspective, try to avoid it as much as possible.
In addition, polystyrene plastics need some plastic additives to improve its performance, but there is no guarantee that these additives are not toxic. Also, the reuse of waste plastics makes the plastic cups more likely to be toxic.