Download or read book Miscibility and Phase Behavior of Poly Enaminonitrile Peo Blends written by and published by . This book was released on 1990 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, we have been synthesizing and studying the properties of poly(enaminonitriles), a novel class of polymers which exhibit the thermal stability of aramides but are readily soluble in simple, volatile solvents such as THF and diglyme, as well as in polar, aprotic solvents. Spectroscopic evidence supports specific hydrogen bonded interactions between the NH-groups of the enaminonitrile unit and the oxygen atoms in the ether. Ether solutions exhibit lower critical solution temperature behavior. For the glymes, the critical temperature for phase separation increases as the number -CH2-CH2-0- units increases from one to eleven. A similar tendency is observed for blends with poly(ethyleneoxide) up to PEO contents of 50 wt-%. DSC, FT-IR and light scattering data will be presented and discussed.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Papers Presented at the Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1990 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyolefin Miscibility Solid State NMR Investigation of Phase Behavior in Saturated Hydrocarbon Blends written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyolefin blends represent a vital material field due to their economic and commercial importance. Potential new properties such as lighter weight, lower cost and higher strength, motivate research to investigate blends of saturated hydrocarbon polymers. However, many questions remain concerning how polymer chain structure and packing influence local thermodynamics, or more specifically, the interplay between enthalpy and entropy, which ultimately control bulk phase behavior. Solid-state NMR has proven to be an essential tool in these studies due to its ability to selectively observe molecular level conformations and dynamics without isotopic labeling. Combinations of basic and advanced variable temperature studies such as 1D and 2D 13C cross-polarization exchange experiments, static 2H lineshape analysis, 1H relaxation/spin-diffusion measurements, and 129Xe experiments were applied in this work. Several systems were studied, including 50/50 weight percent blends of polyisobutylene with polyethylene-co-1-butene, polyisobutylene with head-to-head polypropylene, and atactic polypropylene with the same polyethylene-co-1-butene samples. The results were used to determine a relationship between miscibility, length scales of mixing, and timescales/length scales of the glass transition.
Download or read book Miscibility and phase separation of polymer blends under normal and pressurised conditions written by Guo Weiqing and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1990 with total page 1316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Behavior in Poly ethylene Co vinyl Alcohol Blends with Solvating Polymers written by Sevgul Keskin and published by . This book was released on 2006 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The main objective of this study is to show the effects of hydrogen bonding on the phase behavior of Poly-ethylene-co-vinyl alcohol (pEVOH), para-Poly-vinyl-pyridine (pVPy), Poly-nbutyl-methacrylate (pBMA) ternary polymer blends by using Fourier Transform Infrared Spectroscopy - Attenuated Total Reflectance (FTIR/ATR). FTIR/ATR provides rapid and accurate IR capability through the averaging process made possible by Fourier Transform scanning."--abstract.
Download or read book Synthesis Properties and Miscibility of Poly enaminonitriles high Temperature Polymer written by Ji-Heung Kim and published by . This book was released on 1991 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscibility and Phase Separation of Polymer Blends Under Normal and Pressurised Conditions written by Guo Weiqing and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Miscibility behavior of binary blends of polyethers poly styrene co allyl alcohol and polyethers phenoxy written by Khier Remadna and published by . This book was released on 1985 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1990-10 with total page 1480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Polyolefin Miscibility written by Justyna Ewa Wolak and published by . This book was released on 2005 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: enthalpy, entropy, blends, polyolefins.
Download or read book Faculties Publications and Doctoral Theses in Chemistry and Chemical Engineering at United States Universities written by American Chemical Society. Committee on Professional Training and published by . This book was released on 1991 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phase Behavior in Asymmetric Polymer Blends written by Alisyn Jenise Nedoma and published by . This book was released on 2010 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineered Materials Abstracts written by and published by . This book was released on 1992-07 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Polymer Science Volume 7 written by Geoffrey Allen and published by Pergamon. This book was released on 1989 with total page 712 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 7 deals with specialty polymers and polymer processing, with eight chapters reviewing generic polymer systems and applications and seven chapters describing unit operations of polymer processing.
Download or read book Electronic and Photonic Applications of Polymers written by S. Richard Turner and published by . This book was released on 1988 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation. Papers of a symposium at the 192nd Meeting of the ACS Anaheim, Calif. Sept. 1988. Polymers have become a part of our everyday life. In the telecommunications industry applications have ranged from replacement of lead as a sheath in electric cable to meeting the stringent requirements for dielectrics in transoceanic communication. This seven-chapter book details the latest developments and trends in these applications. Annotation(c) 2003 Book News, Inc., Portland, OR (booknews.com).
