Dynamic Mechanical Properties of Poly (vinyl chloride) Filled with Aramid Short Fibers

• Published in: KOBUNSHI RONBUNSHU 1988/12/25, Vol.45(12), pp.903-910
• Main Authors: TANAKA, Katsutoshi, YAMAGUCHI, Muneaki, MATSUSHITA, Satoru, SUGITA, Masami, OKADA, Shoshichi
• Format: Article
• Language: Japanese
• Subjects: Aramid Fiber; Composite Material; Filled Polymer; Flexural strength; Mechanical Property; Modulus; Poly (vinyl chloride)
• ISSN: 0386-2186; 1881-5685
• DOI: 10.1295/koron.45.903

Dynamic modulus measurement, flexural test, and SEM observation for poly (vinyl chloride) (PVC), filled with aramid short fibers (AF) in the range of 0-0.22 in volume fraction (φr), were carried out The AF particles in the specimens were aligned parallel to the machine direction. As the φr increase, the glass-transition temperature (Tg) and the relative modulus (Ec′/Em′) of the specimens become higher. The phenomena were more remarkable for the specimens cut parallel to the machine direction (MD) than those cut transverse to the machine direction (TD). In the glassy region, the Ec′/Em′ values of MD were larger than those estimated from the rule of mixture, but those of TD were near the estimated values. In the range over Tg (pseudo-rubbery region), theEc′/Em′ values of TD were larger than those calculated from Mooney's equation. The ratios of flexural modulus for MD and TD increased linearly with an increase in φr. For MD, the ratios agreed with Ec′/Em′ in the range of φr=0-0.16, but for TD, they were slightly larger than Ec′/Em′. The increase of affinity between PVC and AF particles treated with silane and titanate coupling agents was relatively small.