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The Effects Of Intermolecular Forces On Polymer Rheology Iii Ionic Forces Above Tg
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Book Synopsis The Effects of Intermolecular Forces on Polymer Rheology, III. Ionic Forces Above Tg by : Edward P. Otacka
Download or read book The Effects of Intermolecular Forces on Polymer Rheology, III. Ionic Forces Above Tg written by Edward P. Otacka and published by . This book was released on 1966 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: In an effort to determine the effects of ionic interactions on the physical properties of polymers, two series of butadiene copolymers were tested for stress strain and stress relaxation behavior. The first group of copolymers were those of butadiene and methacrylic acid which were converted to their anionic form by titration with LiOCH3. The second series were copolymers with 2-methyl, 5-vinyl pyridine which were reacted with CH3I to form the polycations. Finally stoichiometric mixed polysalts were prepared by mixing solutions of the oppositely charged polyions. The modulus-temperature currves of the various materials showed relatively stable plateau values over moderate temperature spans. Both the pyridinium copolymers and the mixed polysalts showed sharp decreases in modulus over a narrow temperature range. This unusual behavior was confirmed in the stress relaxation tests, being manifested as a rapid increase in the shift factors and E(visc), the activation energy for viscous flow. The patterns indicate a transition of one form or another but whether it is indicative of the onset of ionic interchange is not clear. (Author).
Book Synopsis The Effects of Intermolecular Forces on Polymer Rheology, II. Hydrogen Bonding Above Tg by : Edward P. Otocka
Download or read book The Effects of Intermolecular Forces on Polymer Rheology, II. Hydrogen Bonding Above Tg written by Edward P. Otocka and published by . This book was released on 1966 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of three butadiene/methacrylic acid copolymers and three butadiene/2-methyl-5-vinyl pyridine copolymers were evaluated for Young's modulus and stress relaxation modulus between -75C and +75C. Corresponding members of the acidic and basic copolymer series were stoichiometrically combined to provide an intermolecularly hydrogen bonded material which was tested in the same manner. Comparison between the observed modulustemperature curves for the mixed material and the average of the parent materials' modulus-temperature curve reveals a regular, temperature dependent increase in Young's modulus above Tg. Below Tg the rate of increase decreases. The stress relaxation curves of the acidic, basic and mixed copolymers were normalized with respect to Tg. The curves were then differentiated to provide relaxation spectrum curves. The comparison of the average relaxation spectrum curves for the parent materials with that obtained for the mixed material shows depression of short time relaxation mechanisms. Infrared investigations of the hydrogen bond absorptions in stretched films are also discussed. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Intermolecular Forces on the Rheology of Polymers I: Effects Below the Glass Temperature by : Edward P. Otocka
Download or read book The Effects of Intermolecular Forces on the Rheology of Polymers I: Effects Below the Glass Temperature written by Edward P. Otocka and published by . This book was released on 1964 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two series of styrene copolymers were prepared, containing, respectively, acidic and basic comonomers. The mechanical properties of these copolymers were determined for several temperatures below T sub g. Stoichiometric mixtures of these acidic and basic copolymers were studied over the same temperature range, and their mechanical properties compared to those of the parent materials. It was found that the stoichiometric mixtures showed increased modulus, tensile strength and relaxation times. The increases can be related to functional group content and temperature through simple equations. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1966 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Rheology by : Jose Luis Rivera Armenta
Download or read book Polymer Rheology written by Jose Luis Rivera Armenta and published by BoD – Books on Demand. This book was released on 2018-10-03 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rheology is the science that studies the behavior of the flow of matter in a liquid state or soft solids under the application of stress or deformation to obtain a response to an applied force. In polymers, rheology is an important tool to understand behavior under processing conditions and to design equipment. Another application for rheology in the polymer field is to understand structure-property relationships by means of molecular weight, molecular weight distribution, stereochemistry, morphology, melt degradation, and performance under processing. This book covers the essential criteria for selecting the best test types for various applications and new developments, for accurately interpreting results, and for determining other areas where rheology and rheological phenomena may be useful in your work.
Book Synopsis Government-wide Index to Federal Research & Development Reports by :
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1966 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymer Rheology by : Lawrence E. Nielsen
Download or read book Polymer Rheology written by Lawrence E. Nielsen and published by . This book was released on 1977 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Intermolecular Forces on Diffusion in Polymers by : R. Chatten
Download or read book The Effect of Intermolecular Forces on Diffusion in Polymers written by R. Chatten and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Government Research & Development Reports by :
Download or read book U.S. Government Research & Development Reports written by and published by . This book was released on 1966-05-10 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chemorheology of Polymers by : Peter J. Halley
Download or read book Chemorheology of Polymers written by Peter J. Halley and published by Cambridge University Press. This book was released on 2009-05-28 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the dynamics of reactive polymer processes allows scientists to create new, high-value, high-performance polymers. This book is an indispensable resource for researchers and practitioners working in this area. It includes coverage of thermoplastics, thermoset and reactive polymers, together with practical industrial processes and modern chemorheological models and tools.
Book Synopsis Bibliography of Scientific and Industrial Reports by :
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1966 with total page 1258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymerized Ionic Liquids by : Ali Eftekhari
Download or read book Polymerized Ionic Liquids written by Ali Eftekhari and published by Royal Society of Chemistry. This book was released on 2017-09-18 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: The series covers the fundamentals and applications of different smart material systems from renowned international experts.
Book Synopsis Hydrogen Bonded Polymers by : Wolfgang Binder
Download or read book Hydrogen Bonded Polymers written by Wolfgang Binder and published by Springer Science & Business Media. This book was released on 2007-03-16 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of polymeric structure is among the most important endeavours of modern macromolecular science. In particular, tailoring the positioning and strength of intermolecular forces within macromolecules by synthetic methods and thus gaining structural control over the final polymeric materials has become feasible, resulting in the field of supramolecular polymer science. Besides other intermolecular forces, hydrogen bonds are unique intermolecular forces enabling the tuning of material properties via self-assembly processes over a wide range of interactions strength ranging from several kJmol to several tens of kJmol . Central for the formation of these structures are precursor molecules of small molecular weight (usually lower than 10 000), which can assemble in solid or solution to aggregates of defined geometry.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1966 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1992 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyelectrolytes written by Visakh P. M. and published by Springer. This book was released on 2014-09-03 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a valuable reference source to graduate and post graduate students, engineering students, research scholars polymer engineers from industry. The book provides the reader with current developments of theoretical models describing the thermodynamics polyelectrolytes as well as experimental findings. A particular emphasis is put on the rheological description of polyelectrolyte solutions and hydrogels.
