Dispersion of fillers and the electrical conductivity of polymer blends filled with carbon black

✍ Scribed by Masao Sumita; Kazuya Sakata; Shigeo Asai; Keizo Miyasaka; Hideaki Nakagawa

• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 582 KB
• Volume: 25
• Category: Article
• ISSN: 0170-0839
• DOI: 10.1007/bf00310802

✦ Synopsis

Dispersion s t a t e of carbon black(CB) was studied in polymer blends which are i n c o m p a t i b l e with each o t h e r . I t was found t h a t r d i s t r i b u t e s unevenly in each component of the polymer blend. There are two types of distribution. (I) One is almost predominantly distributed in one phase of the blend matrix, and in this phase fillers are relatively homogeneously distributed in the same manner as a single polymer composite. (2) In the second, the filler distribution concentrates at interface of two polymers. As long as the viscosities of two polymers are comparable, interfacial energy is the main factor determining uneven distribution of fillers in polymer blend matrices. This heterogeneous dispersion of conductive fillers has much effect on the electrical conductivity of CB filled polymer blends. The electrical conductivity of CB filled polymer blends is determined by two factors. One is concentration of CB in the f i l l e r rich phase and the other is phase continuity of this phase. These double percolations a f f e c t conductivity of conductive particle filled polymer blends.