Electromagnetic interference-shielding

2 shows that shielding effectiveness depends on the method of incorporation and that the length of fibers can be changed by the process of incorporation. [Pg.799]

Microporous fiber have been produced using the following method. Polypropylene is filled with 25 wt% calcium carbonate. After extrusion, the fiber is stretched at 150°C and calcium carbonate is dissolved by an acid treatment. Pore sizes from 0.01 to 0.02 um are obtained depending on the type of acid treatment and the stretching ratio. Crystallinity decreases as the stretching ratio decreases and the fiber diameter increases after acid treatment because of shrinkage. [Pg.799]

Fillers provide films with conductive properties, influence their surface properties, affect their permeability, mechanical and optical properties, and affect their durability against environmental exposure. Various technologies are used to produce conductive films. These include lamination to metal foils (in-plant, using pressure sensitive adhesives), surface coating, and addition of conductive materials. Conductive films are widely used in packaging to limit static electricity. [Pg.799]

Fillers improve mechanical properties of films. Calcium carbonate coated with stearic acid improved the impact strength of polyethylene bag films. Production output was increased and printability of the film was improved. [Pg.802]

Films containing filler may have a substantially improved UV stability due to the addition of carbon black. It is also possible to produce films which will be biodegradable by the combined action of UV degradation and biodegradation. It was confirmed that china clay increases the degradation rate of polyolefins by consuming stabilizers and thus reducing polymer stability [Pg.802]

Ethylene-vinyl acetate Fetterman [37] reinforced compounded ethylene-vinyl acetate (EVA) copolymer by using short hbers and found that silane coupling agents were effective at establishing improved hber-matrix adhesion. Das et al. [38] prepared carbon fiber-filled conductive composites based on EVA and studied the electromagnetic interference shielding effectiveness of the composites. [Pg.354]

The MWCNT-filled polystyrene composites have good electromagnetic interference shielding properties (Snow and Perkins, 2005). The shielding effectiveness of MWCNT-filled composites was frequency independent, and increased with the... [Pg.198]

Yang YL, Gupta MC (2005). Novel carbon nanotube-polystyrene foam composites for electromagnetic interference shielding. Nano Lett. 5 2131-2134. [Pg.222]

Electromagnetic interference shielding effectiveness of about 18 dB was achieved with 10 vol% MWCNT-PMMA film which was found to be primarily an EMI absorbing composite material. Figure 7.15 shows the variation of EMI shielding effectiveness due to reflection... [Pg.201]

Electromagnetic Interference Shielding, Electromagnetic Radiation Absorption, and Joining of Plastics... [Pg.361]

Blends of intrinsically conductive polymers (ICP s) with conventional thermoplastics offered a practical means of processing ICP s without sacrificing conductivity [KuUcarni, et al., 1991]. One of the major use for these blends was electromagnetic interference shielding. [Pg.972]

FEL 06] Feller J.F., Roth S., Bourmaud A., Conductive polymer composites electrical, thermal, and rheological study of injected isotactic poly(propylene)/long stainless-steel fibers for electromagnetic interferences shielding . Journal of Applied Polymer Science, vol. 100, pp. 3280-3287,2006. [Pg.241]

Y. Niu, Electromagnetic interference shielding with polyaniline nanofibers composite coatings, Polym. Eng. Sci., 48, 355-359 (2008). [Pg.80]

Polypyrrole Apolymer of pyrrole, afive-membered heterocyclic substance with one nitrogen and four carbon atoms and with two double bonds. The polymer can be prepared via electrochemical polymerization. Polymers thus prepared are doped by electrolyte anion and are electrically conductive. Polypyrrole is used in lightweight secondary batteries, as electromagnetic interference shielding, anodic coatings, photoconductors, solar cells, and transistors. [Pg.206]

K.H. Wong, S.J. Pickering, C.D. Rudd, Recycled carbon fibre reinforced polymer composite for electromagnetic interference shielding. Compos. A 41, 693-702 (2010)... [Pg.178]

Y. Wang, X. Jing, Intrinsically Conducting Polymers for Electromagnetic Interference Shielding. Polym. Adv. Technol. 2005,16,344-351. [Pg.88]

P. Saini, V. Choudhary, Enhanced Electromagnetic Interference Shielding Effectiveness of Polyaniline Functionalized Carbon Nanotubes Filled Polystyrene Composites. J. Nanopart. Res. 2013,15. [Pg.88]

P. Salni, V. Choudhary, Structural Details, Electrical Properties, and Electromagnetic Interference Shielding Response of Processable Copolymers of Aniline. /. Mater. Sci. 2013,48,797-804. [Pg.97]

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