1.what materials that possess crystalline structure and non crystalline structure?

Question

1.what materials that possess crystalline structure and non crystalline structure?

Answer 1

Polymers.   They contain crystalline domains and non-crystalline domains.   The percentage,  size,  distribution, etc.  of the crystalline domains determine a significant portion of the properties of the polymer.

If you are interested in learning more,  check the crystalline percentages of amorphous polymers like polycarbonate and polystyrene vs more crystalline polymers like nylon.

One of the more interesting things that can happen is orientation induced crystallinity.   When a fiber of a material like nylon or polyester is oriented and stretched while being extruded, spun and cooled,  it forms a crystalline form which will not otherwise form.   It is particularly strong.