Polylacrylic acid) + zinc diacetate composites: High temperature service and electric conductivity

摘要

Poly(acrylic acid) + zinc diacetate hybrid com- posites have been prepared by precipitation from aqueous solutions and drying. The lowest glass transition tempera- ture Tg determined by differential scanning calorimetry usually large for polymer-based materials (PBMs). Thermogravimetric analysis (TGA) shows that therma] de- composition begins some 1020 K above each Tg. The al- temating current impedance was determined in fhe nitro- gen atmosphere from 370 deg.C to 530 deg.`C. Dynamic dielectric measurements were performed between 20 deg. C and 350 deg. C, also under nitrogen. In contrast to typical PBMs, there is evidence of ionic conduction in some of the composites. The dynamic dielectric properties depend on the composi- tion. The materials obtained are usable in medical applica- tions and as high durability low friction coatings.