ABSTRACT
In Chapter 2, we noted that there is a direct relationship between polymer structure and their physical properties. In this chapter, we examine condensation polymers that primarily have relatively strong attractions, secondary bonding, between and within polymer chains. Because of these strong secondary bonding attractions, these polymers are typically strong, requiring relatively a lot of force to elongate them. Many of them are synthesized such that there is good symmetry allowing the chains to more closely pack together further enhancing the magnitude of the secondary bonding and increasing the glass transition of the materials. When these materials are allowed to form mainly crystals, they can act as bers, and when they are processed such that the noncrystalline fraction is large, they can act as plastics.
