plastic materials

my group and I are presenting a project and each one has some points to talk about 

here are the points or lists that I need to find information for 

This is the project that we chose to talk about 

Choose a product to manufacture - Bike Pedal made of plastic 

Identify what type of material(s) you would need and additional properties.

Why did you choose it

Additives

Polymer blends

Copolymers

make sure to bring reference about the information that you find