Q.8.1 Q 8.12 Q 8.16 What are the three basic categories of polymers? Copolymers can possess four different arrangements of their constituent mers. Name and briefly describe the four arrangements. For an amorphous polymer, at which temperature does its coefficient of thermal expansion change, glass- transition temperature or melting temperature? Q9.1 What is a composite material? Q 9.11 Give some examples of commercial products that are laminar composite structures. (1) List three categories and (2) describe the characteristics of each category. (1) List four arrangements and (2) describe the characteristics of each arrangement. (1) Pick the correct temperature and (2) explain what happens at such temperature and why. (1) Provide the definition of a composite material and (2) describe briefly the characteristics or properties of a composite material. (1) Provide at least 4 examples and (2) describe briefly each example about its properties and/or applications.