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Author : Debasish Banerjee
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (882 download)
Download or read book Multidimensional NMR Studies of the Hyperbranched Polymers and Phosphazene Systems written by Debasish Banerjee and published by . This book was released on 2005 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H.N. Cheng
Publisher : iSmithers Rapra Publishing
ISBN 13 : 9781859572481
Total Pages : 168 pages
Book Rating : 4.5/5 (724 download)
Download or read book Structural Studies of Polymers by Solution Nmr written by H.N. Cheng and published by iSmithers Rapra Publishing. This book was released on 2001 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solution-state NMR spectroscopy is generally regarded as the premier technique to characterise polymer structure. This report provides a timely review of the developments in the NMR of polymers in solution in the past few years. An additional indexed section containing several hundred abstracts from the Polymer Library gives useful references for further reading.
Author :
Publisher :
ISBN 13 :
Total Pages : 604 pages
Book Rating : 4.:/5 (18 download)
Download or read book Multidimensional Spectroscopy of Polymers written by and published by . This book was released on 1995 with total page 604 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anuttra Nuamthanom
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (97 download)
Download or read book Multidimensional NMR Studies of Poly(ethylene-co-1-octene) Copolymers and Poly(ethylene-co-vinyl Acetate-co-carbon Monoxide) Terpolymers written by Anuttra Nuamthanom and published by . This book was released on 2007 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The comonomer and stereo-sequences of poly(ethylene-co-1-octene) samples with varying 1-octene content and degree of tacticity were investigated using high-temperature (120 °C) one- and two- dimensional (1D and 2D) nuclear magnetic resonance (NMR) techniques on a 750 MHz instrument. The techniques used include quantitative 13C NMR, pulsed-field-gradient (PFG) 1H -13C heteronuclear single quantum coherence (gHSQC), heteronuclear multiple bond correlation (gHMBC) and heteronuclear single quantum coherence-total correlation spectroscopy (gHSQC-TOCSY). Diffusion-ordered 2D NMR spectroscopy (DOSY) was used to confirm that the copolymer samples were not mixtures of two copolymers with different MW. Quantitative analysis of octene content was determined from quantitative 13C NMR experiments. The degree of tacticity was established by quantitative volume integration of 2D gHSQC NMR spectra. The comonomer sequence distributions and the resonance assignments of poly(ethylene-co-vinyl acetate-co-carbon monoxide), polyEVC* terpolymer prepared from 13C-labeled carbon monoxide were also investigated using high temperature (120 °C) multidimensional (1D, 2D and 3D) NMR experiments on the same spectrometer. The NMR techniques used include 1D- 1H, 13C, 2D- gHSQC, gHMBC, gHSQC-TOCSY, 3D-gHCACX and 3D-gHCACX-HH-TOCSY NMR experiments. With 13C labeling of the polymer combined with high resolution multidimensional NMR experiments, pentad monomer sequence assignments can be made for the carbon monoxide (C)-centered pentads. The degradation of polyEVC* was also examined by 1D and 2D NMR. The NMR spectra show that [alpha], [beta]-unsaturated carbonyl groups are a degradation product in this terpolymer, arising from elimination of acetic acid from CV dyads.
Author : Weixia Liu
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (434 download)
Download or read book Multi-dimensional NMR Studies of Branching Polyethylenes, Organotin Polymer Chain Ends and Polymer Precursors written by Weixia Liu and published by . This book was released on 1999 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tong Zhang
Publisher :
ISBN 13 :
Total Pages : 132 pages
Book Rating : 4.:/5 (957 download)
Download or read book Pulsed Field Gradient Multidimensional NMR Studies of Polyethylene Based Copolymers at High Temperature written by Tong Zhang and published by . This book was released on 2001 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bo Zhang
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (911 download)
Download or read book Multidimensional NMR Characterization of Perfluorinated Monomer and Its Precursors written by Bo Zhang and published by . This book was released on 2012 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: Perfluorinated polymers are extensively studied due to their low absorption in the near-infrared region of spectrum compared to traditional materials. This makes them ideally suited for plastic optical fiber materials (POF). Different types of perfluorinated polymers, such as poly-(perfluoro-2-methylene-4-methyl-1,3-dioxolane) (poly(PFMMD)) and poly-(vinyl-perfluoro-2,4,5-trimethyl-1,3-dioxolane) (poly(VPFMMD)), can serve as alternatives for poly-(1,1,2,4,4,5,5,6,7,7-decafluoro-3-oxa-1,6-heptadiene) (Crytop©), which is a commonly used fluoropolymer for POF. In order to get a better understanding of the properties of these polymers, it is important to first characterize the structures and purities of their monomer precursors. In this research, perfluorinated monomer (perfluoro-2-methylene-4,5-dimethyl-1,3-dioxolane), its precursor (perfluoro-2,4,5-trimethyl-1,3-dioxolane-2-carboxylic acid), as well as their hydrocarbon precursor (2,4,5-trimethyl-1,3-dioxolane-2-carboxylate), were prepared and studied by 1D- and advanced 2D-NMR techniques. For both perfluorinated compounds, the structures of their possible isomers were proven by 2D-NMR spectroscopy. Due to the large 19F spectral window, this study used selective versions of the correlation spectroscopy (COSY) and nuclear Overhauser effect spectroscopy (NOESY) experiments to provide better resolution and sensitivity. In addition, a new variation of the gradient heteronuclear single quantum coherence spectroscopy (gHSQC) sequence was successful for observing two-bond 19F-13C correlations. Compared with gradient heteronuclear multiple bond correlation spectroscopy (gHMBC) spectrum, the 2J[subscript FC] gHSQC spectrum is greatly simplified due to the absence of splittings caused by multi-quantum coherence. Quantitative 1H or 19F 1D-NMR spectroscopy was used to confirm the resonance assignments and to calculate the ratio of isomers. The conformational compositions of perfluorinated compounds and their hydrocarbon precursor support the idea that fluorination by elemental fluorine is a free radical process.
Author : Friedrich Kremer
Publisher : Springer Science & Business Media
ISBN 13 : 3642561209
Total Pages : 740 pages
Book Rating : 4.6/5 (425 download)
Download or read book Broadband Dielectric Spectroscopy written by Friedrich Kremer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 740 pages. Available in PDF, EPUB and Kindle. Book excerpt: Both an introductory course to broadband dielectric spectroscopy and a monograph describing recent dielectric contributions to current topics, this book is the first to cover the topic and has been hotly awaited by the scientific community.
Author :
Publisher :
ISBN 13 :
Total Pages : 462 pages
Book Rating : 4.:/5 (31 download)
Download or read book Maro Polymer Notes written by and published by . This book was released on 1999 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter A. Williams
Publisher : John Wiley & Sons
ISBN 13 : 0470994193
Total Pages : 344 pages
Book Rating : 4.4/5 (79 download)
Download or read book Handbook of Industrial Water Soluble Polymers written by Peter A. Williams and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural and synthetic water soluble polymers are used in a wide range of familiar industrial and consumer products, including coatings and inks, papers, adhesives, cosmetics and personal care products. They perform a variety of functions without which these products would be significantly more expensive, less effective or both. Written for research, development and formulation chemists, technologists and engineers at graduate level and beyond in the fine and specialty chemicals, polymers, food and pharmaceutical industries, the Handbook of Industrial Water Soluble Polymers deals specifically with the functional properties of both natural and synthetic water soluble polymers. By taking a function based approach, rather than a “polymer specific” approach the book illustrates how polymer structure leads to effect, and shows how different polymer types can be employed to achieve appropriate product properties.
Author : Masami Okamoto
Publisher : iSmithers Rapra Publishing
ISBN 13 : 9781859573914
Total Pages : 190 pages
Book Rating : 4.5/5 (739 download)
Download or read book Polymer/layered Silicate Nanocomposites written by Masami Okamoto and published by iSmithers Rapra Publishing. This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The review sets out to highlight the major developments in this field over the last decade. The different techniques used to prepare PLS nanocomposites are covered. The physicochemical characterisation of PLS nanocomposites and the improved materials properties that those materials can display are discussed. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
Author : Sophie Monge
Publisher : Royal Society of Chemistry
ISBN 13 : 1849736464
Total Pages : 334 pages
Book Rating : 4.8/5 (497 download)
Download or read book Phosphorus-Based Polymers written by Sophie Monge and published by Royal Society of Chemistry. This book was released on 2014-05-30 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the synthesis of different phosphorus-containing polymers and their uses in biomedical, environmental and energy applications.
Author :
Publisher :
ISBN 13 :
Total Pages : 796 pages
Book Rating : 4.F/5 ( download)
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2005 with total page 796 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1442 pages
Book Rating : 4.3/5 (91 download)
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Author : Vadapalli Chandrasekhar
Publisher : Springer Science & Business Media
ISBN 13 : 3540225749
Total Pages : 349 pages
Book Rating : 4.5/5 (42 download)
Download or read book Inorganic and Organometallic Polymers written by Vadapalli Chandrasekhar and published by Springer Science & Business Media. This book was released on 2005-01-18 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has its origins in courses taught by the author to various und- graduate and graduate students at the Indian Institute of Technology, K- pur, India. The diversity of inorganic chemistry and its impact on polymer chemistry has been profound. This subject matter has grown considerably in the last decade and the need to present it in a coherent manner to young minds is a pedagogic challenge. The aim of this book is to present to the students an introduction to the developments in Inorganic and - ganometallic polymers. This book is divided into eight chapters. Chapter 1 provides a general overview on the challenges of Inorganic polymer synthesis. This is f- lowed by a survey of organic polymers and also includes some basic f- tures of polymers. Chapters 3-8 deal with prominent families of inorganic and organometallic polymers. Although the target group of this book is the undergraduate and graduate students of chemistry, chemical engineering and materials science it is also hoped that chemists and related scientists in industry would find this book useful. I am extremely thankful to my wife Sudha who not only encouraged me throughout but also drew all the Figures and Schemes of this book. I also thank my children Adithya and Aarathi for their constant concern on the progress of this book. I express my acknowledgment to the editorial team of Springer-Verlag for their cooperation.
Author : Anjun Qin
Publisher : Royal Society of Chemistry
ISBN 13 : 1782627162
Total Pages : 260 pages
Book Rating : 4.7/5 (826 download)
Download or read book Click Polymerization written by Anjun Qin and published by Royal Society of Chemistry. This book was released on 2018-08-28 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Click Polymerization has been edited by world renowned experts and provides an authoritative guide to this reaction type.
Author : Munmaya Mishra
Publisher : CRC Press
ISBN 13 : 9780824719869
Total Pages : 368 pages
Book Rating : 4.7/5 (198 download)
Download or read book Star and Hyperbranched Polymers written by Munmaya Mishra and published by CRC Press. This book was released on 1999-05-25 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizing the raw data needed for a wide variety of industrial applications, this work supplies up-to-date advanced in research on star, hyperbranched and dendritic polymers. It provides detailed descriptions of the size and shape of the molecules that make up these polymers, as well as their biological advances, low viscosity in solution and substrate-holding properties.
