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Tuesday, August 11, 2020 | History

3 edition of Orientation effects in solid polymers found in the catalog.

Orientation effects in solid polymers

Europhysics Conference on Macromolecular Physics (5th 1976 Budapest)

Orientation effects in solid polymers

by Europhysics Conference on Macromolecular Physics (5th 1976 Budapest)

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Published .
Written in English


Edition Notes

Sponsored by the European Physical society.

StatementProceedings of the 5th Europhysics Conference on Macromolecular Physics , Budapest , 27-30 April 1976 ; edited by G Bodor.
SeriesJournal of Polymer Science : Polymer Symposium 58
ContributionsBodor, G.
ID Numbers
Open LibraryOL17049957M

Mechanical properties of solid polymers Constitutive modelling of long and short term behaviour PROEFSCHRIFT ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de Rector Magnificus, R.A. van Santen, voor een commissie aangewezen door het College voor Promoties in het openbaar te verdedigenCited by: This book should be a mandatory reading for every engineer seeking to understand the mechanics of solid polymers and how to produce sound, accurate numerical models. Chapter 6 provides a clear description of linear by:

Mechanics of solid polymers: theory and computational modeling Jorgen S Bergstrom Very few polymer mechanics problems are solved with only pen and paper today, and virtually all academic research and industrial work relies heavily on finite element simulations and specialized computer software.   Treatise on Materials Science and Technology, Volume Properties of Solid Polymeric Materials, Part A covers knowledge in the critical areas of polymeric materials. The book provides a background in polymer structure and morphogenesis, and discusses rubberlike elasticity, a phenomenon thermodynamically unique to long-chain Edition: 1.

Semiconducting polymers are composed of elongated conjugated polymer backbones and side chains with high solubility and mechanical properties. The combination of these two features results in a high processability and a potential to orient the conjugated backbones in thin films and nanofibers. The thin films and nanofibers are usually composed of highly crystalline (high charge transport) and Cited by: 6. length polymers (~ g/mol) are waxy solids, solid polymers have molecular weights of g/mol m M n w w = m is the mer molecular weight Introduction to Materials Science, Chap Polymer Structures University Tennessee, Dept. of Materials Science and Engineering 12 Introduction to Materials Science, Chap Polymer.


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Orientation effects in solid polymers by Europhysics Conference on Macromolecular Physics (5th 1976 Budapest) Download PDF EPUB FB2

Get this from a library. Orientation effects in solid polymers: proceedings of the 5th Europhysics Conference on Macromolecular Physics, Budapest, Hungary, April,held under the sponsorship of the European Physical Society, Hungarian Academy of Sciences, Section Chemical Sciences, Roland Eötuös [sic] Physical Society.

[G Bodor; European Physical Society. Get this from a library. Orientation effects in solid polymers: proceedings of the 5th Europhysics Conference on Macromolecular Physics, Budapest, Hungary, April Orientation effects in solid polymers book Bodor; European Physical Society.;].

It is the deformation due to this latter part that gives rise largely to the properties of the oriented solid polymers.

From the value of the stress optical coefficient and the relation between maximum shrinkage stress and length reversion ratio estimates of the size of the random link and of the effect of temperature of orientation and strain.

The book shows how best to make use of commercially available finite element software to solve polymer mechanics problems, introducing readers to the current state of the art in predicting failure using a combination of experiment and computational techniques.

Mechanics of Solid Polymers provides a modern view of how solid polymers behave. Orientation in polymers Viscoelasticity, like thermodynamics, is concerned with the correlation of controllable variables and bulk, macroscopic phenomena. But one unique feature of polymeric materials is that the molecular unit, the polymer chain, can be highly anisotropic, i.e.

the chain can be fully extended, or curled up in an amorphous. The first edition was produced at a time when the advantages of studying oriented polymers were just becoming apparent.

From a sci entific stand point it had been demonstrated that greater insight into both structure and properties could be obtained if an oriented polymer was prepared. From a technological viewpoint, major advances were under way, especially in high modulus and high strength.

Orientation Effects on the Thermal, Mechanical and Tribological Performance of Neat, Reinforced and Blended Liquid Crystalline Polymers (Pages: ) R. Schledjewski K. Friedrich. The tendency for polymers to experience post-extrusion warpage and distortion from orientation is related to their glass-transition temperatures (Tg).

Glass transition is the temperature at which the polymer changes from a rubbery consistency to a rigid structure. Abstract. Controlling the solid-state orientation of semiconducting polymers has been a challenging topic in order to achieve high mobilities in organic field-effect transistors and good power conversion efficiencies in organic by: 1.

• describe the effects of heating on molecular orientation of polymers. Recommended Placement in the Curriculum This study is recommended for use in the discussion of any of the following topics: • molecular orientation, • effects of heat, • polymers, and • statistical analysis of File Size: 47KB.

This book is an authoritative and comprehensive account of the principles and practice of modern NMR spectroscopy of solid polymers to determine their structure and dynamics at a molecular : Ulrich Scheler.

The last part of the book contains major new sections on polymer composites, such as nanocomposites, and electrical properties of polymers. Other new topics include effects of chain entanglements, swelling of elastomers, polymer fibres, impact behaviour and ductile by: Effects of Orientation on the Segmental Dynamics of Natural Rubber Article (PDF Available) in Materials Science Forum March with 78 Reads How we measure 'reads'.

The International Winter School on Electronic Properties of Polymers Orien­ tation and Dimensionality of Conjugated Systems, held March, in Kirchberg, ('lYrol) Austria, was a sequel to three meetings on similar subjects held there.

The winter school was again organized in. The electronic properties of free standing films of polyaniline (PANi) and the subsequent effects of orientation upon the films will be discussed.

Film conductivity of the order 70 Scm”1 unoriented, and up to Scm”1 in the oriented state have been measured along with anisotropics up to Author: A. Monkman, F. Hampson, A. Milton. The chemical inertness, high melting point, and intrinsic lubricity of polytetrafluoroethylene (PTFE) have been used to develop solid lubricating parts for operation in extreme environments, from Cited by: The solid-state stretching also contributes to the slip and rearrangement of the crystal lamellae, ultimately affecting the crystallinity and crystal size of iPP.

Many experts have studied the orientation and phase transformation of iPP film during stretching using wide-angle and small-angle X-ray scattering [20,21].Cited by: 3. This paper is concerned with the effects of orientation on the combinatorial term g for the number of ways to pack together N x linear polymers (x mers).

Accordingly g is evaluated as a function of the number of molecules in each permitted direction for the case of straight rigid rods. The permitted directions can be continuous so that g is derived as a function of the continuous function f(r Cited by: Solid State Polymerization of Step-Growth Polymers (Solid State Polycondensation),14 Monomer Solid State Polymerization (Direct SSP),16 Prepolymer Solid State Polymerization (Post-SSP, Solid State Finishing),21 Solid State Polymerization Apparatus and Assemblies,26 Solid State Applications in the Polymer Industry, In order to understand orientation-induced crystallization of polymers, we introduced an intermolecular interaction between polymer chains based on quantum mechanics.

We therefore considered a pair of perfectly extended chains where the intermolecular interaction is assumed to be based on the hydrogen interaction with a single chain. When two protons of each extended chain become closer Cited by: 6. Effect of Solids Concentration on Polymer Adsorption and Conformation 29 gests that polymers become stretched when the solids content is increased above 25 vol-ume percent.

Confonnational changes correlate well with this change in polymer adsorp-tion density since a stretched polymer will occupy more area on the surface than a coiled polymer.- 29 Polymers polymer chains \I /' cross-links Figure Schematic representation of a polymer with a few cross- links between the chains From the standpoint of general physical properties, we usually recog- nize three types of solid polymers: elastomers, thermoplastic polymers, and thermosetting Size: 1MB.Controlling solid-state order of π-conjugated polymers through macromolecular design is essential for achieving high electronic device performance; yet, it remains a challenge, especially with respect to polymer-packing orientation.

Our work investigates the influence of backbone coplanarity on a polymer’s preference to pack face-on or edge-on relative to the by: