<P> Many of the properties of plastics are determined by the UL Standards, tests specified by Underwriters Laboratories (UL), such as: </P> <Ul> <Li> Flammability - UL94 </Li> <Li> High voltage arc tracking rate - UL746A </Li> <Li> Comparative Tracking Index </Li> </Ul> <Li> Flammability - UL94 </Li> <Li> High voltage arc tracking rate - UL746A </Li>

• when was the first synthetic polymer produced from crude oil