Chemical microstructure of polymer chains by Jack L. Koenig

Cover of: Chemical microstructure of polymer chains | Jack L. Koenig

Published by R.E. Krieger Pub. Co. in Malabar, Fla .

Written in English

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Subjects:

  • Polymers,
  • Polymerization

Edition Notes

Book details

StatementJack L. Koenig.
Classifications
LC ClassificationsQD381 .K595 1990
The Physical Object
Paginationxviii, 414 p. :
Number of Pages414
ID Numbers
Open LibraryOL2209351M
ISBN 100894643924
LC Control Number89031764

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The basis of chemical and physical methods (i. e., vibrational and NMR) are presented with special emphasis on their role in determining repeating units and sequencing units in polymer chains. A detailed analysis Chemical microstructure of polymer chains book the copolymerization processes is presented and the microstructure of a copolymer is used for the determination of the copolymerization Cited by: The basis of chemical and physical methods (i.

e., vibrational and NMR) are presented with special emphasis on their role in determining repeating units and sequencing units in polymer chains.

A detailed analysis of the copolymerization processes is presented and the microstructure of a copolymer is used for the Chemical microstructure of polymer chains book of the copolymerization Author: Jack L.

Koenig. absorption addition analysis assignments atoms average band beam bonds calculated carbon Chem chemical shift chloride conditional probabilities configuration copolymer copolymer composition copolymerization coupling cross-linking curve decoupling degree of polymerization determine distribution divinyl dyads effect energy equation experimental frequency function head-to-head head-to-tail helix helix band homopolymer intensity interaction isotactic laser linear Macromolecules magnetic.

Copolymer Microstructure and Its Experimental Treatment. Chemical and Physical Methods of Determining Polymer Microstructure. Vibrational Spectroscopy of Polymers.

Nuclear Magnetic Resonance of Polymer Chains. Chain Isomerism through Monomer Enchainment. Chain Isomerism Involving Stereoconfiguration.

Chain Isomerism Due to Branching in Polymers. Click on the article title to read : F. Bovey. Chemical microstructure of polymer chains, Jack L. Koenig, Wiley, New York,: Bernard J. Bulkin. The models include ideal chains, Gaussian chains, real chains, wormlike chains, and branched chains.

Drawing an analogy to a random walk, the chapter explains how to calculate various statistical properties of the polymer such as the end‐to‐end distance and the radius of gyration.

Polymers: Chain-like, form lamellar crystals Semicrystalline microstructure: my) Macromolecules41, In pipe grade PE Macro-scale toughness controlled by Molecular attributes (molecular weight distribution, chemical composition along polymer chain) More “tie” chains that link crystalline lamellae.

Microstructural features are often of tremendous importance in deciding the physical, and to some extent the chemical, properties of polymers. The term microstructure does not necessarily infer that the feature of concern occurs at low concentrations. It is more concerned with the particular detail of the structure of the polymer.

At the heart of all polyolefin manufacturing processes is the system used to promote polymer chain growth. For industrial applications, polyethylene is made with either free radical initiators or coordination catalysts, while polypropylene is produced only with coordination Size: KB.

The key to this extreme versatility lies in the way the monomer molecules (ethylene, propylene and higher α-olefins) are connected to form the polymer chains and can be quantified, on the most elementary level, by their distributions of molecular weight (MWD), chemical composition (CCD) (or short-chain branching, SCB), and long-chain branching (LCB).

By changing these Cited by: Chemical Microstructure of Polymer Chains by Jack L. Koenig and a great selection of similar Used, New and Collectible Books available now at Patents - google books Measurement of Stereoregularity in Polypropylene," J. Koenig and A Chemical Microstructure of.

The layered polymer nanocomposites have attracted great interest from scientists due to their unique properties. However, the formation mechanism of these nanocomposites in the intercalation process is not fully understood yet.

In this work, we simulate the intercalation processing of polymer chains into twoCited by: 3. at getting information about the chemical structure of polymer materials. Macroscopic property measurement is what might be referred to as conventional polymer characterization.

It involves taking a macroscopic polymer specimen, often in the nal solid form, and doing experiments that give information about properties of that Size: KB.

The rotational degree of freedom in the bonds of the polymer chain backbone allows a wide range of molecular shapes for the chain. One example in nature is the folding of proteins which influences the functionality of the whole structure.

l n steps r =(l)1/2n Because chain-links bend in a random way the average distance, r, between. This book explains the following topics: Polymers and the Environment, Emulsion Polymerization, Polymer Science Approach to Physico-Chemical Characterization and Processing of Pulse Seeds, Polymer Characterization with the Atomic Force Microscope, Nonconventional Method of Polymer Patterning, The Properties and Application of Carbon.

Title: Chemical microstructure of polymer chains, Jack L. Koenig, Wiley, New York,pp. Authors: Feldman, D. Publication: Journal of Polymer Science: Polymer. polymer chains inside the clay interlayers. Otherwise, a solvent can also be used as the reaction medium in order to reduce the viscosity of the bulk medium and to distribute the heat more uniformly.

In such cases, a solvent is chosen in which the polymer and monomer are soluble, and the solvent also is able to swell the clay. Chemical microstructure of polymer chains. J.L. Koenig, Wiley-Interscience, Chichester,pp.

xviii +price £ Chain transfer has been defined as the reaction of a propagating radical with a nonradical substrate to produce a dead polymer chain and a new radical capable of initiating a polymer chain. The transfer agent may be a deliberate additive (e.g., a thiol) or it may be the initiator, monomer, polymer, solvent.

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All books are in clear copy here, and all. Chemical microstructure analysis suggested that the nipagin and eugenol-derived units were inserted into polymer chains in an arbitrary manner. Due to the short chain of 1,6-hexanediol, the splitting of magnetically different methylene carbons, adjacent to the alcohol-oxygens, proved to be more sensitive towards sequence distributions, at the.

Polymers that are not highly cross-linked have properties that depend greatly on the forces that act between the chains. By way of example, consider a polymer such as polyethene which, in a normal commercial sample, will be made up of molecules having to \(\ce{CH_2}\) groups in continuous chains.

Polymer Chains (Thermoplastics and Thermosets) A polymer is an organic material and the backbone of every organic material is a chain of carbon atoms. The carbon atom has four electrons in the outer shell. Each of these valence electrons can form a covalent bond to another carbon atom or to a foreign atom.

Neutral and Charged Polymers at Interfaces. This book explains the concepts and features that are relevant to the adsorption of neutral and charged polymers at equilibrium, including the type of polymer/surface interaction, the solvent quality, the characteristics of the surface, and the polymer structure.

Author(s): Roland Netz, David Andelman. To study the positions of the carbon atoms along the linear chain of a polymer, let us consider three contiguous atoms -C-C-C- along the chain (gray circles in Figure ).

Because they are connected by covalent bonds, the length l of a bond is fixed at l = nm, and the angle θ between the successive bonds is fixed at θ = A polymer (/ ˈ p ɒ l ɪ m ər /; Greek poly- "many" + -mer, "part") is a large molecule, or macromolecule, composed of many repeated subunits.

Due to their broad range of properties, both synthetic and natural polymers play essential and ubiquitous roles in everyday life.

Polymers range from familiar synthetic plastics such as polystyrene to natural biopolymers. 6 1 In-situ Synthesis of Polymer Nanocomposites reactive groups present in one of the modifi cations were expected to chemically react with the polyurethane matrix thus leading to chemical tethering of the polymer chains on the fi ller surface.

On the other hand, the fi ller for which the. The properties of polymers and plastics can be altered in a number of ways. This information sheet describes four of them. Plasticisers A plasticiser is a small molecule that can be put in between the large molecules of a polymer.

The plasticiser acts a little bit like oil in a car engine – it helps the polymer molecules slide over each other File Size: 57KB.

A variety of biobased polymers have been derived from diverse natural resources. However, the mechanical properties of some of these polymers are inferior due to low chain entanglement. We report a facile strategy termed “supramolecular chain entanglement”, which utilizes supramolecular interactions to create physical cross-linking and entanglements for polymers with long pendent fatty by: 2.

The series Advances in Polymer Science presents critical reviews of the present and future trends in polymer and biopolymer science.

It covers all areas of research in polymer and biopolymer science including chemistry, physical chemistry, physics, material science. The amorphous aPP side chains have an unexpected nucleating effect that facilitates crystallization of the EAA backbone, as evidenced by an increase in crystallization temperature.

Journal of Chemical Theory and Computation. Long-Chain Hyperbranched Comb Block Copolymers: Synthesis, Microstructure, Rheology, and Thermal Behavior. Carlos Author: Carlos R. López-Barrón, Patrick Brant, Maksim Shivokhin, Jiemin Lu, Shuhui Kang, Joseph A.

Throckmor. Composite from van der Waals bonding between the chains Applns. Properties Voigt, Reuss, Hill Anistrpy. CTE Cellular Matls. Wood 7 Properties • It is useful to review the basic proper?es of the different types of materials that are used in composites. • Polymers - long [carbon] chain molecules with anythingFile Size: 8MB.

Book Description “Highly recommended!” – CHOICE New Edition Offers Improved Framework for Understanding Polymers. Written by well-established professors in the field, Polymer Chemistry, Second Edition provides a well-rounded and articulate examination of polymer properties at the molecular level.

It focuses on fundamental principles based on underlying chemical structures, polymer. Flash Chemistry: Fast Organic Synthesis in microsystems is the first book to describe this exciting new technique, with chapters covering: an introduction to flash chemistry reaction dynamics: how fast is the act of chemical transformation, what is the rate of reaction, and what determines the selectivity of a reaction.

examples of why flash 5/5(1). Rubinstein's textbook is another great introduction to polymer physics (especially scaling principles, percolation, and fractal behavior), and Hiemenez and Lodge's book. Characterization of polymers by NMR • Analysis: •O mf onomser • Of copolymers (sequences) • Of reaction products • Of the microstructure (3 types of isomerism, including tacticity) • Of the composition of a copolymer • Of branching in polyethylene • Of relaxation mechanismsFile Size: KB.

The performance of polymeric materials depends strongly on the control over the polymer microstructure during the synthesis step. In this review, attention is paid to the potential of microkinetic modelling to facilitate the identification of optimal reactants and reaction conditions to design the polymer microstructure in bulk and solution (post)polymerisation processes.

Chemical Engineering / Important Concepts, Lecture Lecture 9: Introduction to Thermodynamic Models for Polymer/Solvent (and Polymer/Polymer Mixing) - Configurational Entropy without any chains (two species arranged randomly on a lattice) - Ideal Solution for two species o dHmix = 0 o dSmix is configurational only.

The simplest definition of a polymer is a useful chemical made of many repeating units. A polymer can be a three dimensional network (think of the repeating units linked together left and right, front and back, up and down) or two-dimensional network (think of the repeating units linked together left, right, up, and down in a sheet) or a one.

Purchase Molecular Characterization and Analysis of Polymers, Volume 53 - 1st Edition. Print Book & E-Book. ISBNThe physical properties of a polymer such as its strength and flexibility depend on: chain length - in general, the longer the chains the stronger the polymer;; side groups - polar side groups (including those that lead to hydrogen bonding) give stronger attraction between polymer chains, making the polymer stronger;; branching - straight, unbranched chains can pack together .The long chain length allows for entanglement (see Figure ).The entan-glements help hold the whole material together under stress.

In the melt state, chain entanglements cause the viscosity to be raised very significantly also. The long chains shown in Figure also illustrate the coiling of polymer chains in the amorphous Size: KB.

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