Polyamide-imides chemical structures

Polyamide-imides are heterocyclic polymers having an atom of nitrogen in one of the rings of the molecular chain. A typical chemical structure is shown below ... 

Most polyamide-imides are not as heat resistant as are the polyimides discussed in the next section. They are, however, easier to process. The polyester-imides might be considered as upgraded polyesters, though properties vary, depending upon chemical structure. ... 

Figure P.14 General chemical structure of polyamide-imide.

The general methods to synthesize poly(amide imide)s are rather simple and include those monomers and reactions conducting to polyimides or polyamides, consequently, the number and variety of chemical structures reported are countless [174]. The most important ones will be mentioned here. 

Figure 7.25 Chemical structures of monomers used to make polyamide-imides.

Figure 7.26 Chemical structure of a typical polyamide-imide.

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