Conductive Fillers w/ Tunable Properties



November Dinner Meeting & Lecture

" Conductive Fillers with Tunable Properties -Applications of Intrinsically Conductive Polymer Nanocomposites "

Jamshid Avlyanov
Eeonyx Corporation
Pinole, California
Thursday, Nov. 18
Michael's at Shoreline, Mountain View

See details below for Abstract and registration information.

GGPF November Dinner Lecture – Details
Date: Thursday, Nov. 18
Location: Michael's in Shoreline Park, Mountain View
6:00 social hour
7:00 dinner
8:00 lecture

Cost:$30 regular / $15 retired or unemployed

Dinner Choice: Chicken Marsala, salmon, or vegetarian lasagna
Registration Deadline:
5 PM, Monday, Nov. 15

To Register: Contact Khushroo Gandhi, preferably by email, at 650-623-0720

Tell us your name, affiliation, and dinner choice.

Provide your email and/or phone number for confirmation.

Your registration will be confirmed; if it is not, please tryagain.

Cancellations: Cancellations are accepted up until the registrationdeadline.

*** If you fail to appear without canceling by then, we must ask you topay.
***Note: attending the talk alone at 8:00 is free, but we ask you to notify us for headcount purposes.

From 101 take the Shoreline Boulevard Exit, turning toward the bay. Drive past the Shoreline Amphitheater and go straight ahead into ShorelinePark. After a mile or so, a sign for Michael's will direct you to turnleft intothe parking lot.

Address: 2960 N Shoreline Blvd. Restaurant phone: 650-962-1014

" Conductive Fillers with Tunable Properties -Applications of Intrinsically Conductive Polymer Nanocomposites "

Jamshid Avlyanov
Eeonyx Corporation
Pinole, California

Conductive compounds, one of the fastest growing classes of specialtythermoplastics and thermosets, are typically manufactured by the additionof conductive fillers such as carbon black (CB), metal powder, metal orcarbon fibers, etc., to a polymeric matrix. Several disadvantages existwiththe current technologies, such as incompatibility of components, processingdifficulties at high loading levels, or problems with making materials withreproducible resistivities.

New intrinsically conductive polymers (ICPs)represent another class of conductive fillers, but their use is limited dueinlarge part to poor thermal oxidative stability (up to ~ 180 C).Intrinsically conductive polymer/carbon black (ICP/CB) nanocomposites,prepared via in-situ polymerization and deposition of ICPs onto CB,represent a new class of conductive filler that possesses greater thermaloxidative stability than pure ICPs (up to 300 to 350 C) and can thereforebeprocessed with the majority of plastics and thermosets without degradationor loss of conductivity.

ICP/CB by nature is a very flexible conductivefiller(variables include the type and amount of conductive polymer, theassociated dopant, and the grade of CB), and the physical properties canbe fine-tuned to meet a broad range of requirements.The ICP/CB filler results in a greatly reduced surface area and pore volumecompared to the original CB; consequently, melt processing can lead toconductive or static dissipative blends with improved mechanical andmelt flow properties, greatly reduced compounding difficulties, and easierend-product fabrication.

Electrical properties can differ greatly fromtraditional CB filler as well. For example, in some polymer systems, equalconductivities can be achieved with half the loading level (e.g., ABS,nylons,polyesters), while in some heterogeneous plastic alloys, a tenfold increasein conductivity compared to high structure CB can be obtained.

MixingICP/CB into silver-loaded thermoset systems can lead to improved thermaland electrical conductivity. A fine conductive ICP/CB network within thematrix resin eliminates macroscopic regions with a sharp gradient ofconductivity. It can be difficult to make CB-based compounds withconsistentresistivity in the static dissipative range because the required loadingslieon the vertical part of the percolation curve (i.e., an insulator/conductortransition occurs sharply within a very narrow range of CB concentration).

Specifically designed ICP/CB fillers allow the reproducible tuning ofresistivity to desired levels.Eeonomer® materials are commercially-available ICP/CB nanocomposites.Many Eeonomer® applications will be discussed, including compounds forelectrostatic discharge control, conductive adhesives, highly conductiveplastic compounds with high dielectric constant, and coatings for metalcorrosion prevention.


Dr. Avlyanov is a Vice President and Technology Officer at Eeonyx Corporation, Pinole, CA. The company is developing InherentlyConductive Polymer materials. Prior to joining Eeonyx Corporation in1995, he was a Visiting Scientist at the Dept. of Chemistry at the Univ.of Pennsylvania in the group of Professor Alan G. MacDiarmid, who is aco-discoverer of ICPs. Before joining Prof. MacDiarmid's group, hewas a Senior Scientist at the Institute of Polymer Chemistry and Physicsat Acad. Sci. of Uzbekistan, where he headed a group of students andscientists working on fundamental science and practical applications ofICPs. He received his MS degree in Chemical Engineering at TashkentPolytechnic Institute, Uzbekistan, and Ph.D. in Polymer Chemistry atMoscow State University, Russia. He has (co)written over thirty papersand seven patents and patent applications in this area.

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