Design of polyphenylenes with ultra low dielectric constant and high permeability Alexei R. Khokhlov

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Design of polyphenylenes with ultra low
dielectric constant and high permeabilityAlexei
R. Khokhlov Nesmeyanov Institute of
Organoelement Compounds Russian Academy of
Sciences,Vavilov st., 28, 119991, GSP-1,
Moscow, Russia
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Synthesis and application of multifunctional
polymers
Polymer membranes for gas separation
Microelectronics intermediate insulators
Multifunctional polyphenylenes
High gas permeability P and selectivity aP1/P2
High thermal stability Tggt420oC, ultra low
permittivity elt2.5
Design of monomer unit
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The Approach Proposed
Design of monomer unit
Loosening of chain packing, increase in free
volume Vf
Decrease in polarizability, increase in
hydrophobicity
Increase of gas permeability P
Decrease in permittivity e
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Interrelation of different tasks
Data Base

• Chemical design
• (INEOS, TIPS)

3. Transport parameters of polymers and
membranes Vf, P, aP1/P2 (TIPS)
3. Permittivity of polymers e (INEOS)
2. Synthesis of polymers (INEOC, TIPS)
4. Coatings and nano-foams, from supercritical
CO2 (INEOS)
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Methods used and equipment employed
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Anticipated Results

• Synthesis of novel fluorine containing
  polyphenylenes
• Tggt420ºC ? T10gt550ºC
• elt2.2
• P(O2)gt1500 Barrer, a(O2/N2)gt3
• 2. Preparation of polymer coatings and
  nano-foams in supercritical ??2
• elt1.5

• New materials for membrane gas separations
• (O2/N2, H2/CH4)
• II. Improved materials for microelectronics

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Relation of gas permeability P and permittivity ?
Amorphous Teflons
Growth of chain stiffness
Fluorination
Phenylated polyphenylene
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Design of Novel Polyphenylenes
Control of chain stiffness and free volume,
(P, aP1/P2)
Control of chain packing (a, e)
Tggt450oC
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Synthetic Routes to Polyphenylenes

• Chemical steps include
• Cross-combination
• Oxidation
• Cyclization
• Diels-Alder polyaddition
• Chemistry enables accurate structure control and
  can lead to a wealth of target polymer structures

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Reduction of permittivity in nano-porous systems
For a given chemical structure, permittivity can
be additionally reduced for micro- and
nanoporous systems. Nanoporous materials can
be manufactured using supercritical technology.

Polyimides
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Field of expertises of the proposing teams

• Synthesis of novel polymeric materials
• Computer modeling
• Prediction of membrane properties and testing of
  novel materials
• Measurement of permittivity of polymers
• Supercritical technology

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Features and technical advantages of the project

• Novel polyfunctional polymers with wide
  possibilities of design
• Ultra low permittivity and high
  thermo-mechanical parameters
• High gas permeability with controlled selectivity
• Preparation of coatings and nano-foams with no
  residual solvents (good ecology)

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Potential fields and collaborators
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• Alexei R. Khokhlov
• Nesmeyanov Institute of Organoelement Compounds
  Russian Academy of SciencesVavilov st., 28,
  119991, GSP-1, Moscow, Russia
• tel. [phone], fax [phone]
• E-mail khokhlov_at_polly.phys.msu.ru
• http//polly.phys.msu.ru
• http//www.ineos.ac.ru