High Performance Polymers, 2nd Edition

11: POLY(NAPHTHALATES) 271

Polyesters made from mixtures of TPA and 2,6-

NDA or NDC have also been found to have unique

and desirable properties, such as resistance to gas dif-

fusion. This property makes them suitable for manu-

facturing for food and beverage containers [6].

PBN exhibits a very rapid crystallization rate and

its T

g

is difficult to detect by simply heating the

quenched sample [84]. Since the crystallization rate

of PBN is much faster than that of PBT, its pro-

cessing cycle time can be shortened. Because of its

facile processability, PBN can be molded by either

injection or extrusion into electrical, electronic, and

machine parts. PBN exhibits excellent mechanical

strength, heat resistance, dimensional stability, resis-

tance to chemical, ...