1993 Volume 50 Issue 6 Pages 497-505
Dynamic mechanical properties of immiscible, compatibilized polymer blend were investigated by using a Rheovibron. Specimens were prepared from extruded sheets of Orgalloy (R) (PA6/PP), blend of polyamide-6 (PA6) andpolypropylene (PP). Both the as-peaks of PA6 and PP were observed in the temperature dependences of loss modulus (E'') and tanδ. The as-peak of PA6 in the PA6/PP specimen kept in water shifted to lower temperature by 95°C and overlapped with that of PP. The dynamic storage moduli (E') of water-adsorbed specimens increased in thetemperature range of below-40°C, and E' at higher temperatures were rather small in comparison with those of dried specimens. When the water-adsorbed specimen was dried again under vacuum, δE' of the specimen reached to the same level of the original dried specimen. Also, effects of aging of PA6/PP at 200°C were investigated. The crystallization of PA6 phases was promoted and the PP phase recrystallized after melting. The temperature dependence of E' of the aged specimen was affected by changes of morphology of PA6 and PP phase. The aa-peak of PA6 phase in E''-temperature curve shifted to higher temperatures.
