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E-grāmata: Polymers and Polymeric Materials for Fiber and Gradient Optics

  • Formāts: 222 pages
  • Izdošanas datums: 06-Jan-2023
  • Izdevniecība: VSP International Science Publishers
  • Valoda: eng
  • ISBN-13: 9781000893724
  • Formāts - EPUB+DRM
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  • Bibliotēkām
  • Formāts: 222 pages
  • Izdošanas datums: 06-Jan-2023
  • Izdevniecība: VSP International Science Publishers
  • Valoda: eng
  • ISBN-13: 9781000893724

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This book considers general aspects of the theory of polymers applied in optics. The main factors affecting the light loss in polymeric wave beam guides (PG) are discussed, and the mechanism of light loss in PG is analysed. Polymers applied in fiber optics are classified with reference to methods of fabrication and purification of the materials. Technological aspects of material fabrication are considered together with kinetic aspects of polymerisation. Updated information on polymerisation kinetics of MMA and styrene, and copolymerisation of these monomers with each other is reported. Other topics discussed in the book are heterogeneity of optic copolymers, association between structure and reactivity of monomers, other properties of optic copolymers, and areas of their commercial application. This volume will be of value and interest to anyone working in the field of optic polymers, both in academia and industry.
Preface xi
Introduction 1(2)
Optical properties of polymers and materials based on them. General problems
3(20)
Refractive index. Dispersion of refractive index
3(5)
Optical anisotropy. Birefringence
8(1)
Optical inhomogeneity
9(1)
Numerical aperture
10(1)
Reasons and mechanisms for light losses
11(6)
Reflection
11(1)
Scattering
11(3)
Absorption
14(3)
The lowest (theoretical) limit of losses in PG
17(1)
Light losses in polymeric media modified by substitution of hydrogen atoms by atoms of various elements
18(5)
Polymers for fiber optics
23(40)
General demands
23(1)
Polymers for core of optical fibers
23(34)
Polymerizational polymers and copolymers. General problems of their production
24(5)
Poly(methyl methacrylate) and other polymers of methacrylic acid ethers - the main materials for PG core
29(8)
Modified poly(methyl methacrylate) as the material for PG core
37(6)
Polystyrene and styrene copolymers with methyl methacrylate and alkyl methacrylates
43(11)
Polymers from deuterated monomers
54(3)
Polycondensational polymers; other types of polymers for PG core
57(3)
Nontraditional polymerization polymers for fiber optics
60(3)
Polymers for covers of optical fibers
63(32)
Fluorine-containing polyalkyl(meth)acrylates and α-fluoroacrylates
67(6)
Estimation of relative radical-forming ability of monomers of the fluorine methacrylate sequence in radical homopolymerization and copolymerization (in mass) with vinyl monomers and structure of macromolecular chain of copolymers obtained
73(20)
Kinetics of radical polymerization of fluorine (meth)acrylates in mass
73(7)
Kinetics of radical copolymerization of fluorine-containing methacrylates with vinyl monomers; relative activity of comonomers, structure of the macrochain and compositional inhomogeneity of copolymers obtained
80(11)
Determination of absolute rate constants of chain propagation during polymerization of fluorine-containing monomers
91(2)
Study of polymerization of fluorine-containing methacrylates in the presence of some stable radicals
93(2)
Properties of PGs as information transmission channels
95(6)
Transmission bandwidth
95(2)
PG and light-emitting diodes (LEDs)
97(4)
Polymeric media with refractive index gradient
101(90)
Classification of the refractive index gradient
102(1)
Measurements of the main parameters of selfocs (metrology of selfocs). Measurements of distribution of the refractive index profile and the absolute value of the refractive index by selfoc radius
103(2)
Methods of preparing GRIN-elements
105(24)
Method of diffusion exchange
106(19)
Copolymerization method
125(2)
Method of gravitational separation
127(1)
Method of dipolephoresis
127(2)
Method of gradient modification of polymeric materials
129(1)
Controlled gradient formation
129(62)
Main principles of formation of macrosurface GRIN-elements
129(4)
Equipment
133(2)
Theoretical stipulation of the controlled gradient formation
135(7)
Particular examples of realization of controlled heterogeneous gradient formation
142(14)
Method of obtaining cylindrical (disk-like) polymeric objects with a given radial gradient of the refractive index
156(3)
Method of obtaining cylindrical (disk-like) objects with a given radial composition (refractive index) gradient based on powder-like materials
159(8)
Method of obtaining long polymeric cylindrical preforms with radial gradual gradient of refractive index
167(4)
Method of diffusion copolymerization of monomers
171(3)
Preparing a selfoc with elliptical cross-section
174(1)
Preparing a multi-channel light focusing matrix
175(2)
Study of γ-irradiation effect on optical properties of isotactic polypropylene
177(3)
Obtaining of macrosurface GRIN-medium by γ-irradiation of isotactic polypropylene
180(4)
Method of producing a gradient birefringent element
184(7)
Some technical methods of producing polymeric waveguides (optical fibers, selfocs)
191(8)
Continuous obtaining of PGs
191(1)
Discontinuous or batch production of PGs
192(1)
PG production from a preform by the method of preform copying
192(2)
Method of core covering and method of compositional molding of core and cover melts
194(2)
Preparation of Gradient-Index Polymer Fibers by closed extrusion method
196(1)
Obtaining selfocs of unlimited length from thermoreactive (co)polymers
196(3)
References 199(18)
Subject Index 217


N. Lekishvili, L. Nadareishvili, Gennady Zaikov, L. Khananashvili