Electronics polymer science

C. P. on.. Application of Polymers in Encapsulation of Electronic Parts, Advances of Polymer Science, Vol. 84, Springer-Vedag, Berlin, 1988, pp. 63—83. 

The third main type of bond is the co-ordinate bond, in which both of the shared electrons come from one atom. Examples of interest in polymer science are the addition compounds of boron trifluoride Figure 5.3). 

The science and technology of conducting polymers are inherently interdisciplinary they fall at the intersection of three established disciplines chemistry, physics and engineering hence the name for this volume. These macromolccular materials are synthesized by the methods of organic chemistry. Their electronic structure and electronic properties fall within the domain of condensed matter physics. Efficient processing of conjugated polymer materials into useful forms and the fabrication of electronic and opto-electronic devices require input from engineering i. e. materials science (more specifically, polymer science) and device physics. 

This review has shown that the analogy between P=C and C=C bonds can indeed be extended to polymer chemistry. Two of the most common uses for C=C bonds in polymer science have successfully been applied to P=C bonds. In particular, the addition polymerization of phosphaalkenes affords functional poly(methylenephosphine)s the first examples of macromolecules with alternating phosphorus and carbon atoms. The chemical functionality of the phosphine center may lead to applications in areas such as polymer-supported catalysis. In addition, the first n-conjugated phosphorus analogs of poly(p-phenylenevinylene) have been prepared. Comparison of the electronic properties of the polymers with molecular model compounds is consistent with some degree of n-conjugation in the polymer backbone. 

New natural polymers based on synthesis from renewable resources, improved recyclability based on retrosynthesis to reusable precursors, and molecular suicide switches to initiate biodegradation on demand are the exciting areas in polymer science. In the area of biomolecular materials, new materials for implants with improved durability and biocompatibility, light-harvesting materials based on biomimicry of photosynthetic systems, and biosensors for analysis and artificial enzymes for bioremediation will present the breakthrough opportunities. Finally, in the field of electronics and photonics, the new challenges are molecular switches, transistors, and other electronic components molecular photoad-dressable memory devices and ferroelectrics and ferromagnets based on nonmetals. 

S. Schlick and G. Jeschke, Electron spin resonance. In J.I. Kroschwitz (Ed.), Encyclopedia of Polymer Science and Engineering. Wiley-Interscience, New York, NY, 2004, pp. 614-651, Chapter 9. Web edition 15 July 2004. Hardcopy edition 15 August 2004. 

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Successful development of fibre optic chemical sensors requires the cooperation of many specialists in various fields of science. Scientists in analytical chemistry, polymer science, material science, optoelectronics and electronics etc. can be involved in this multidisciplinary task. Depending on the application of the sensor biologists, medical doctors or environmentalists can also be incorporated to the working group. Although, the contribution of all specialists cannot be classified by the importance, analytical chemistry and material science seem to be the key to the success. 

Advances in Polymer Sciences is included in Springer s eBook package Chemistry and Materials Science. If a library does not opt for the whole package the book series may be bought on a subscription basis. Also, all back volumes are available electronically. 

The search for flexible, noncorrosive, inexpensive conductive materials has recently focused on polymeric materials. This search has increased to include, for some applications, nanosized fibrils and tubes. The conductivity of common materials is given in Figure 19.1. As seen, most polymers are nonconductive and, in fact, are employed in the electronics industry as insulators. This includes PE and PVC. The idea that polymers can become conductive is not new and is now one of the most active areas in polymer science. The advantages of polymeric conductors include lack of corrosion, low weight, ability to lay wires on almost a molecular level, and ability to run polymeric conductive wires in very intricate and complex designs. The topic of conductive carbon nanotubes has already been covered (Section 12.17). 

Many applications of surface modified maferials (such as in molecular electronics, separation science or continuous flow catalysis) require the use of mechanically and pressure-stable carriers. Grubbs et al. and later Nuzzo et al. reported on the surface modification of Si(lll). Conversion of surface Si - H into Si-allyl groups allowed them to pursue the grafting-from approach shown in Schemes [36,37]. The thickness of the polymer layer could be... 

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