Polypropylene carbonate is soluble in polar solvents, such as lower ketones, ethyl acetate, dichloromethane and chlorinated hydrocarbons, but insoluble in alcohol, water and aliphatic hydrocarbons. It also forms a stable emulsion in water.
PPC allows gases such as oxygen to diffuse through it. The glass transition temperature (Tg) is between 25-45℃, and the PPC adhesive is amorphous. The glass transition temperature of PPC is slightly higher than that of polyethylene carbonate (PEC).
Extended data:
Other commonly used categories of "No.7" PC: kettle, water cup and milk bottle.
Uses: A widely used material, especially in milk bottles, is controversial because it contains bisphenol A. Lin Hanhua, an associate professor in the Department of Biochemistry of City University of Hong Kong, said that in theory, as long as bisphenol a 100% is converted into plastic structure in the process of manufacturing PC, it means that the product does not contain bisphenol A at all, let alone release it.
However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released into food or drink. Therefore, when using this kind of plastic container, we should be especially careful.
Reference source: Baidu Encyclopedia -PPC Plastics
Reference source: Baidu Encyclopedia-Plastics