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Polymer Systems with Gradient of Optical and Electrical Properties

#G-1703


Investigation of Formation of Gradiently Oriented State in Polymer Materials and Creation of Devices Based on Them with Desirable Gradient of Optical and Electrical Properties

Tech Area / Field

  • MAT-ELE/Organic and Electronics Materials/Materials
  • OTH-ELE/Electrotechnology/Other
  • PHY-OPL/Optics and Lasers/Physics

Status
3 Approved without Funding

Registration date
19.11.2008

Leading Institute
Institute of Cybernetics, Georgia, Tbilisi

Collaborators

  • Marquette University / Department of Chemistry, USA, WI, Milwaukee\nCase Western Reserve University / Department of Macromolecular Science and Engineering, USA, OH, Cleveland\nUniversity of Alacant / Analytical Chemistry Department, Spain, Alacant\nUniversidade de Coimbra / Departamento Quimica, Portugal, Coimbra\nUniversity of Strathclyde / Department of Pure and Applied Chemistry, UK, Glasgow

Project summary

Goal of the Project. For one of the main directions of polymer science of the XXI century is the fabrication and investigation of materials with the gradient of properties. Fundamental goals of the Project are: 1. Investigation of the regularities of formation of gradiently oriented state in linear polymers; 2. Creation and investigation of gradient birefringence (GB) elements - multifunctional optical elements having definite gradient of birefringence (polarization space modulators, polarization compensators and interference filter) 3. Creation and investigation of polymer materials with definite gradient of electrical conductivity properties (GE-materials). 4. Study of possibilities of usage GB- and GE-elements in photonics, holography, luminescent analysis, electrical engineering.

Actuality of the Project. Introduction in science of a new specific state of polymer materials and corresponding new physical characteristics –gradiently oriented state essentially expands the idea on the generally polymer science problems. The results obtained in this sphere will principally increase the possibilities of regulation of mechanical, thermal, electrical, optical, acoustic and other properties of polymers and will create an impulse to production of new advanced materials.

Novelty of the project. GB-optics – the science of studying of GB-materials – is a new direction of modern optics. The state existing in this field is completely determined by the scientific production created by the authors of the Project. The GB-optics has been established only several years ago as a result of our scientific publications. Besides of the authors of the Project create polymer composites having established gradient of electrical properties for the first time. Realization of the project will stipulate GB-optics and technology of new electrical engineering materials of contemporary optics and microelectronics.

Competition of executors of the project. Executors of the project have adequate competence and experience to which indicates the scientific level and volume of the research works - scientific publications published earlier by their authorship.

Scientific value of the project. Project foresees the establishment of the general regularities of gradient oriented state. On the example of polarization transparent amorphous polymers a principally new technological regime of formation optical elements having given gradient of birefringence - GB-elements will be based and the influence of parameters of technological processes (value, rate and distribution of deformation, temperature, environment, the chemical structure of polymer) on the optical properties will be studied. The laboratory equipment of principally new construction will be worked out and prepared for generation of inhomogeneous mechanical field which allows us to realize various types of relative lengthening in polymeric matrix (linear, hyperbolic, sinusoidal, etc.). GB-elements with the established gradient of birefringence will be fabricated of the meaning of linear birefringence having the interval ( and more) and the dependence . The possibilities of their priority/exclusive use will be established in various spheres (polarizing compensators, photonics, interference polarization monochromators, luminescence analysis).

Practical value of the project. Transition of polymers to preliminary established gradiently oriented state have been realized by us for the first time. Therefore unique will be the devices and methods for formation of established inhomogeneous mechanical field. GB – elements are optical elements having unique properties. It’s possible creation of optical devices of new generation on the basis of GB - and GE-elements.

Potential Demand for the Project Results. Users of our Project results can be scientific-research structures, optical instrument-making manufactures/firms and electronic engineers. On the basis of the results given after realization of the project we can modify some existing laboratory equipment of principally new construction in accordance with requests of modern optics and electrical engineering.

Meeting ISTC Goals and Objectives. The importance of the project in meeting ISTC is to provide 7 weapons scientists and engineers in the CIS opportunities to redirect their talents to peaceful activities;

Technical Approach and Methodology. For creation of gradiently oriented state an uniaxial stretching by means of nonhomogeneous mechanical field is used. The inter-location and/or form was selected so that it, s provided with preliminary established gradient of relative lengthening in various sections of polymer film. By means of variation of other parameters (temperature, value and rate of deformations, etc.) it is possible to regulate the gradiently oriented state of polymers. Characterization of this state will be made by means of investigation of birefringence. Thus, the birefringence is a testing characteristic of gradiently oriented state and at the same time it is itself a purposeful property of the material. Analogical conclusion may be made in case of electrical conductive polymer composites on the basis of thermoplastics and conducting materials. These composites may be used in electronics as assembly plates for different electrical schemes.

Following methods and apparatus will be included to the experimental works on investigation of electrical properties of gradiently oriented electrical conductive polymer composites:

  1. Measuring of conductivity of composites by using 4-electrode method;
  2. Measuring of temperature dependence of specific electrical surface resistance of composite films;
  3. Method of spin probe (ESR) and nuclear magnetic resonance (NMR) for definition of degree of homogeneity of distribution of filler nano-particles in the polymer matrix;
  4. Analogous -digital transformer connected to measuring system (computer) for investigation of behaviour of local resistance in dynamical regime of films;

Potential Role of Foreign Collaborators is information exchange in the course of project implementation; preparation of joint publications, consultation and meetings on the international conferences on the problems of polymer materials.


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The International Science and Technology Center (ISTC) is an intergovernmental organization connecting scientists from Kazakhstan, Armenia, Tajikistan, Kyrgyzstan, and Georgia with their peers and research organizations in the EU, Japan, Republic of Korea, Norway and the United States.

 

ISTC facilitates international science projects and assists the global scientific and business community to source and engage with CIS and Georgian institutes that develop or possess an excellence of scientific know-how.

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