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Author : Carolina Galmes Meerholff
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (93 download)
Download or read book Novel Aliphatic Hyperbranched Polyurethanes written by Carolina Galmes Meerholff and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hyperbranched Polyesters for Polyurethane Coatings: Their Preparation, Structure and Crosslinking with Polyisocyanates written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this work, hyperbranched aromatic polyesters-polyphenols based on 4,4-bis(4' hydroxyƠphenyl)pentanoic acid (BHPPA) were prepared and, according to the authors knowledge, for the first time tested as precursors for polyurethane bulk resins and coatings. Comparison of poly-BHPPA with competing products The materials prepared in this work show better properties than their aliphatic polyester-polyol analoga based on 2,2-bis-(hydroxymethyl)propanoic acid (BHMPA). Especially, the solubility of poly-BHPPA in organic solvents is better and poly-BHPPAs also do not tend to microphase separation during their reaction with isocyanates, in contrast to poly-BHMPAs. The poly-BHPPA and the polyurethane networks made from them display higher Tg values than analogous poly- BHMPA compounds. Because of the high Tg of the reacting and final systems, curing must occur at elevated temperatures (90°C) in order to avoid undercure. The lower reactivity of phenolic OH groups prevents the reaction from being too fast at that temperature. A drawback of the polyurethanes based on the aromatic polyesters-polyols prepared is the lower thermal stability of their urethane bonds, if compared to aliphatic urethanes. An interesting possibility for future investigations would be the modification of the BHPPA monomer in order to change the OH functionality from phenolic to aliphatic OH, e.g. by replacement of the phenolic OH by hydroxymethyl or hydroxyethyl groups (requires a strong modification of the monomer synthesis) or simpler by reacting the phenolic OH of BHPPA with a suitable reagent like oxirane, which would lead to groups like O-CH2-CH2-OH in the place of the phenolic OH. Such a BHPPA modification should in turn yield modified "poly-BHPPA" polycondensates, which would combine the advantages of poly-BHPPA with those of aliphatic OH precursors of polyurethanes. Poly-BHPPA synthesis Hyperbranched polymers of the 4,4-bis-(4'-hydroxyphenyl)pentanoic acid (BHPPA) were synthesized successfully by t.
Author : Ram K. Gupta
Publisher :
ISBN 13 : 9780841298408
Total Pages : pages
Book Rating : 4.2/5 (984 download)
Download or read book Polyurethane Chemistry written by Ram K. Gupta and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book is about Polyurethane Chemistry: Renewable Polyols and Isocyanates"--
Author : . Inamuddin
Publisher : Springer Nature
ISBN 13 : 9811605181
Total Pages : 483 pages
Book Rating : 4.8/5 (116 download)
Download or read book Recent Advances in Microbial Degradation written by . Inamuddin and published by Springer Nature. This book was released on 2021-07-07 with total page 483 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbes play a major role in the degradation of various pollutants. Therefore, microbes find potential application in the area of energy and environmental technology. The book provides in-depth literature on the topics of environmental and industrial importance. It is compiled to explore the application of microbe used in the degradation of aflatoxin, polymers, biomass into fuel, disinfectants, food products, xenobiotic compounds, lipids, steroids, organic pollutants, proteins, oil waste, and wastewater pollutants. This book will be of interest to teachers, researchers, scientists, and capacity builders. Also, the book serves as additional reading material for undergraduate and graduate students of microbiology and environmental sciences. National and international remediation and restoration scientists, policymakers will also find this to be a useful read.
Author : Sándor Kéki
Publisher : MDPI
ISBN 13 : 3039284940
Total Pages : 358 pages
Book Rating : 4.0/5 (392 download)
Download or read book Functional Polyurethanes – In Memory of Prof. József Karger-Kocsis written by Sándor Kéki and published by MDPI. This book was released on 2020-04-01 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of 22 per-reviewed scientific papers on the synthesis and characterization of polyurethanes with special chemical and physical properties. In our "plastic age", polyurethanes are one of the most versatile polymers with broad and excellent mechanical and chemical properties. These polyurethanes can be found in many areas of our every day`s life ranging from insulators through hard and soft foams to various biomedical devices. The huge number of possible variations in the types of reactants allows the scientists to design and tailor the properties of polyurethanes to specific needs. The fascinating chemistry and materials science of polyurethanes have attracted interests of many scientists. As a result, the progress in this field made by these scholars are summarized in this book with special emphasizes on the structure-property relationships and biomedical applications of polyurethanes as well as their environmental aspects are also highlighted in some papers. Thus, this collection of papers is recommended to all readers who are interested not only in the synthesis and properties of polyurethanes but want to be familiar with the theoretical description of their formation as well.
Author : Heléne Magnusson
Publisher :
ISBN 13 : 9789171705259
Total Pages : 41 pages
Book Rating : 4.7/5 (52 download)
Download or read book Hyperbranched Aliphatic Polymers written by Heléne Magnusson and published by . This book was released on 2000 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ram K. Gupta
Publisher : CRC Press
ISBN 13 : 1000532879
Total Pages : 457 pages
Book Rating : 4.0/5 (5 download)
Download or read book Eco-Friendly Waterborne Polyurethanes written by Ram K. Gupta and published by CRC Press. This book was released on 2022-01-24 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: The polyurethane industry is among the fastest growing, with polyurethanes used in consumer as well as industrial sectors. Waterborne polyurethanes (WPUs) exhibit many advantages over conventional volatile organic compounds (VOCs) based polyurethanes and have emerged as an environmentally friendly alternative. WPUs offer an opportunity to use sustainable raw materials to produce environmentally sustainable polymers, particularly, polyols derived from vegetable oils. Eco-Friendly Waterborne Polyurethanes: Synthesis, Properties, and Applications provides state-of-the-art knowledge of the synthesis, application, and property enhancement of WPUs. Covers various types of eco-friendly materials and technologies used to synthesize WPUs Presents an overview and applications of WPUs in several advanced research areas Provides fundamentals of synthetic processes and their chemistries for specific applications Elaborates on advanced approaches used to convert renewable resources into polymers Offers new direction to scientists, researchers, and students to better understand the chemistry, technologies, and applications Written for polymer chemists, materials scientists, and other researchers and industry, this book serves as a comprehensive reference for readers interested in the development and application of sustainable polymers.
Author : Craig M. Thompson
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (115 download)
Download or read book Synthesis and Characterization of Novel Aliphatic and Aromatic-aliphatic Poly (enaminonitriles). written by Craig M. Thompson and published by . This book was released on 1999 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mihail Ionescu
Publisher : Walter de Gruyter GmbH & Co KG
ISBN 13 : 3110644126
Total Pages : 352 pages
Book Rating : 4.1/5 (16 download)
Download or read book Mihail Ionescu: Polyols for Polyurethanes. Volume 2 written by Mihail Ionescu and published by Walter de Gruyter GmbH & Co KG. This book was released on 2019-09-02 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 of the updated and extended 3rd edition of this work focuses on the chemistry and technology of rigid polyurethanes. Recent developments in obtaining polyols from renewable resources and the field of rigid polyurethanes have been included. This book is of interest to chemists and engineers in industry and academia as well as anyone working with polyols for the manufacture of PUs.
Author : Stuart L. Cooper
Publisher : Woodhead Publishing
ISBN 13 : 0081006225
Total Pages : 720 pages
Book Rating : 4.0/5 (81 download)
Download or read book Advances in Polyurethane Biomaterials written by Stuart L. Cooper and published by Woodhead Publishing. This book was released on 2016-01-23 with total page 720 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Polyurethane Biomaterials brings together a thorough review of advances in the properties and applications of polyurethanes for biomedical applications. The first set of chapters in the book provides an important overview of the fundamentals of this material with chapters on properties and processing methods for polyurethane. Further sections cover significant uses such as their tissue engineering and vascular and drug delivery applications Written by an international team of leading authors, the book is a comprehensive and essential reference on this important biomaterial. - Brings together in-depth coverage of an important material, essential for many advanced biomedical applications - Connects the fundamentals of polyurethanes with state-of-the-art analysis of significant new applications, including tissue engineering and drug delivery - Written by a team of highly knowledgeable authors with a range of professional and academic experience, overseen by an editor who is a leading expert in the field
Author : A S Khanna
Publisher : Elsevier
ISBN 13 : 1845694732
Total Pages : 473 pages
Book Rating : 4.8/5 (456 download)
Download or read book High-Performance Organic Coatings written by A S Khanna and published by Elsevier. This book was released on 2008-07-09 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paint coatings remain the most widely used way of protecting steel structures from corrosion. This important book reviews the range of organic paint coatings and how their performance can be enhanced to provide effective and lasting protection.The book begins by reviewing key factors affecting the success of a coating, including surface preparation, methods of application, selecting an appropriate paint and testing its effectiveness. It also discusses why coatings fail, including how they degrade, and what can be done to prevent these problems. Part two describes the main types of coating and how their performance can be enhanced, including epoxies, polyester, glass flake, fluoropolymer, polysiloxane and waterborne coatings. The final part of the book looks at applications of high-performance organic coatings in such areas as reinforced concrete, pipelines, marine and automotive engineering.With its distinguished editor and international team of contributors, High-performance organic coatings is a valuable reference for all those concerned with preventing corrosion in steel and other metal structures. - Reviews the factors affecting the success of a coating - Describes the main types of coating and how their performance can be enhanced, including epoxies, polyester and waterborne coatings - Examines applications in such areas as reinforced concrete pipelines and marine engineering
Author : De-Yi Wang
Publisher : Woodhead Publishing
ISBN 13 : 0081001630
Total Pages : 344 pages
Book Rating : 4.0/5 (81 download)
Download or read book Novel Fire Retardant Polymers and Composite Materials written by De-Yi Wang and published by Woodhead Publishing. This book was released on 2016-08-21 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Novel Fire Retardant Polymers and Composite Materials reviews the latest scientific developments and technological advances in the design and manufacture of fire retardant polymers and composite materials. Fire retardant polymeric materials are used in a broad range of applications in fields such as aviation, automotive, computer, construction, electronics, and telecommunications. It is essential to have a better understanding of the scientific technology used in the design and manufacture of fire-resistant materials and their end products. This book includes the latest developments in fire retardant technologies for different polymeric material systems, such as PU, PP, PE, PLA, epoxy, rubber, textile, phenol resin, and PA, etc. - Provides cutting-edge research in flame retardant materials, relevant to both scientific and industrial applications - Presents the latest and most up-to-date fire retardant technologies - Discusses the most popular fire retardant polymer systems - Includes the latest developments in fire retardant technologies for different polymeric material systems, such as PU, PP, PE, PLA, epoxy, rubber, textile, phenol resin, and PA
Author : Albena Lederer
Publisher : Royal Society of Chemistry
ISBN 13 : 1849733945
Total Pages : 304 pages
Book Rating : 4.8/5 (497 download)
Download or read book Hyperbranched Polymers written by Albena Lederer and published by Royal Society of Chemistry. This book was released on 2015 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by acknowledged experts in the field, the book will appeal to both scientists working in fundamental research, both active and new to the field, as well as industrial manufacturers of dendritic polymers.
Author : Simon James Aldersley
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (593 download)
Download or read book Synthesis and Characterisation of Aliphatic Hyperbranched Polyamidoamines and Polyamides written by Simon James Aldersley and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Timothy E. Long
Publisher : Springer
ISBN 13 : 3319136178
Total Pages : 239 pages
Book Rating : 4.3/5 (191 download)
Download or read book Porous Carbons – Hyperbranched Polymers – Polymer Solvation written by Timothy E. Long and published by Springer. This book was released on 2014-12-26 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 thematic volumes are addressed to scientists, whether at universities or in industry, who wish to keep abreast of the important advances in the covered topics. Advances in Polymer Science enjoy a longstanding tradition and good reputation in its community. Each volume is dedicated to a current topic, and each review critically surveys one aspect of that topic, to place it within the context of the volume. The volumes typically summarize the significant developments of the last 5 to 10 years and discuss them critically, presenting selected examples, explaining and illustrating the important principles, and bringing together many important references of primary literature. On that basis, future research directions in the area can be discussed. Advances in Polymer Science volumes thus are important references for every polymer scientist, as well as for other scientists interested in polymer science - as an introduction to a neighboring field, or as a compilation of detailed information for the specialist. Review articles for the individual volumes are invited by the volume editors. Single contributions can be specially commissioned. Readership: Polymer scientists, or scientists in related fields interested in polymer and biopolymer science, at universities or in industry, graduate students.
Author : Nguyen Cam Tat
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (93 download)
Download or read book A Novel Free Radical Polymerisation Approach to Hyperbranched Poly(methyl Methacrylate) written by Nguyen Cam Tat and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Characterization of Hyperbranched Poly(urea-urethane)s written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis aims to synthesize hyperbranched poly(urea-urethane) polymers (HPU) in one-pot method using commercially available monomers which are 2,4-toluylene diisocyanate (TDI) as aromatic diisocyanate and isophorone diisocyanate (IPDI) and 2(3-isocyanatopropyl) cyclohexylisocyanate (IPCI) as aliphatic diisocyanates. Those proposed diisocyanates were reacted with diethanolamine (DEA) or diisopropanolamine (DIPA). Conditions of polymerisation reactions were optimised. Complete structural analysis using 1H and 13C NMR for the obtained aromatic polymers was carried out. Degree of branching up to 70% was calculated. Aliphatic polymers have spectra with overlapped signals therefore, no full structural analysis was possible. Molar masses were determined using SEC/RI detector which shows that the prepared polymers have Mw values between 1600 g/mol and 106000 g/mol. Thermal analysis for different polymer systems showed that aliphatic HPU are more thermally stable and have values of glass transition temperature higher than aromatic ones. Modification of the end groups in the prepared hyperbranched polymers was carried out using three different modifiers and degree of modification up to 100%. Linear polymers based on the same diisocyanate monomers were prepared to compare the properties of hyperbranched systems with their linear analogs. Measurements of solution viscosity showed that HPU have lower solution viscosity values than their linear analogs of comparable molar masses. Rheological measurement of some polymer samples of different systems were carried out and showed that our hyperbranched systems exhibit a more elastic behavior than the linear polymers. Surface studies for thin films prepared from different polymer systems (hyperbranched, linear and modified) were carried out and the obtained thin films were characterized using light microscope, microglider, GC-MS, and AFM. Contact angle measurements showed that HPU have a relatively hydrophilic character. The modified.
