Toyota wants to salute do-gooders by giving 100 cars over 100 days to organizations that could really use a new set of wheels. And voters like you decide who gets a new ride every day.
PEI is the abbreviation for Porcelain Enamel Institute. A PEI Rating is given to a tile product based the hardness of its glaze. This hardness is determined by the manufacturer using a standardized test.
Structure [edit]. The molecular formula of the repeating unit of PEI is C 37 H 24 O 6 N 2 and the molecular weight is 592 g/mol. The glass transition temperature of PEI is 217 Â°C.