Radikalische Polymerisation von Styrol, Methyl- und Glycidylmethacrylat in ueberkritischem Kohlendioxid bei diskontinuierlicher und kontinuierlicher Prozessfuehrung
The new edition of a classic text and reference The large chains of molecules known as polymers are currently used in everything from ´´wash and wear´´ clothing to rubber tires to protective enamels and paints. Yet the practical applications of polymers are only increasing; innovations in polymer chemistry constantly bring both improved and entirely new uses for polymers onto the technological playing field. Principles of Polymerization, Fourth Edition presents the classic text on polymer synthesis, fully updated to reflect today´s state of the art. New and expanded coverage in the Fourth Edition includes: * Metallocene and post-metallocene polymerization catalysts * Living polymerizations (radical, cationic, anionic) * Dendrimer, hyperbranched, brush, and other polymer architectures and assemblies * Graft and block copolymers * High-temperature polymers * Inorganic and organometallic polymers * Conducting polymers * Ring-opening polymer ization * In vivo and in vitro polymerization Appropriate for both novice and advanced students as well as professionals, this comprehensive yet accessible resource enables the reader to achieve an advanced, up-to-date understanding of polymer synthesis. Different methods of polymerization, reaction parameters for synthesis, molecular weight, branching and crosslinking, and the chemical and physical structure of polymers all receive ample coverage. A thorough discussion at the elementary level prefaces each topic, with a more advanced treatment following. Yet the language throughout remains straightforward and geared towards the student. Extensively updated, Principles of Polymerization, Fourth Edition provides an excellent textbook for today´s students of polymer chemistry, chemical engineering, and materials science, as well as a current reference for the researcher or other practitioner working in these areas.
Einfluss der Vermischung auf chemische Reaktionen im Taylor-Couette Reaktor am Beispiel der Polymerisation von Methacrylat: Zhen Liu
Thermische und laserinduzierte radikalische Polymerisationen von Styrol bis zu hohen Druecken, Temperaturen und UmsaetzenLaser, physikalisch
Microorganisms are capable of producing a wide variety of biopolymers. Homopolymer peptides, which are made up of only a single type of amino acid, are far less ubiquitous. The only two amino-acid homopolymers known to occur in nature are presented in this volume. Poly-epsilon-L-lysine is a polycationic peptide and exhibits antimicrobial activity against a wide spectrum of microorganisms. It is both safe and biodegradable and is therefore used as a food preservative in several countries. In addition, there has been great interest in medical and other applications of poly-lysine and its derivatives. In contrast, poly-gamma-glutamic acid is an unusual anionic polypeptide. It is also water soluble, biodegradable, edible, non-toxic and non-immunogenic and can be chemically modified to introduce various drugs. These features are very useful for pharmaceutical and biomedical applications. Poly-glutamic acid is also a highly attractive as a food ingredient.
Effect on composite polymerisation by light curing units-Invitro study: Cheena Bansal
Surface Engineering of Polymer Membranes covers the processes that modify membrane surfaces to improve their in-service performance, meaning, to confer surface properties which are different from the bulk properties. Purposes may be to minimize fouling, modulate hydrophilicity/ hydrophobicity, enhance biocompatibility, create diffusion barriers, provide functionalities, mimic biomembranes, fabricate nanostructures, etc. First, the basics of surface engineering of polymer membranes are covered. Then topics such as surface modification by graft polymerization and macromolecule immobilization, biomimetic surfaces, enzyme immobilization, molecular recognition, and nanostructured surfaces are discussed. This book provides a unique synthesis of the knowledge of the role of surface chemistry and physics in membrane science. Dr. Zhikang Xu of the Institute of Polymer Science of Zhejiang University has eight Chinese patents and in 2006 was honored as a Distinguished Young Scholar by the National Natural Science Foundation of China (NNSFC).
The synthesis and chemistry of several carbosilane dendrimers were investigated. These dendrimers were analysed using a variety of techniques. Both a convergent and a divergent methodology were used to build up the carbosilane dendrimers. The carbosilane dendrimers were derived using mainly hydrosilylation reactions. These reactions appeared to be particularly useful as they appeared to go to completion. It was necessary to use quantitative reactions to prevent unreacted functionalities on the dendrimers. The simple allyl-terminated dendrimers were functionalised with a variety of silanes. These silanes were then used to further functionalise the dendrimers. A number of derivatives of chloromethylsilyl terminated dendrimers were investigated. The generation of lithiated dendrimers, based on the above mentioned dendrimers, was achieved. A number of zirconocene complexes was prepared in order to link these to the dendrimers through a sigma-bond and a number of model compounds was prepared. Reaction of Schwartz´s reagent with the zeroth, first and second generation dendrimer was performed. These compounds were used in polymerisation reactions.
Synthese funktioneller Blockcopolymere durch RAFT-Polymerisation und polymeranaloge Umsetzungen: Alexandra Tchernook
Up-to-date coverage of methods of emulsion polymerization This book provides a comprehensive reference on emulsion polymerization methods,focusing on the fundamental mechanisms and kinetics of each process, as well as how they can be applied to the manufacture of environmentally friendly polymeric materials. Topics covered include: * Conventional emulsion polymerization * Miniemulsion polymerization * Microemulsion polymerization * Industrial emulsion polymerization processes (primarily the semibatch and continuous reactions systems) * The role of various colloidal phenomena in emulsion polymerization * Important end-use properties of emulsion polymer (latex) products * Information on industrial applications in paints, coatings, adhesives, paper and board, and more This is a hands-on reference for graduate students and professionals in polymer chemistry, chemical engineering, and materials science who are involved in research on coatings, adhesives, rubber, latex, paints, finishes, and other materials that can be created using various methods of emulsion polymerization.
The first all-inclusive text covering coordination polymerisation, including important classes of non-hydrocarbon monomers. Charting the achievements and progress in the field, in terms of both basic and industrial research, this book offers a unified and complete overview of coordination polymerisation. * Provides detailed description of the historical development of the subject * Presents a unified view of catalysis, mechanisms, structures and utility * Encourages learning through a step-by-step progression from basic to in-depth text * Features end-of-chapter exercises to reinforce understanding * Offers a full bibliography and comprehensive literature review Requisite reading for research students studying introductory and advanced courses in; polymer science, catalysis and polymerisation catalysis, and valuable reference for researchers and technicians in industry.
pThis book provides an essential overview of the science of polysaccharides. It both approaches polysaccharides as a polymer class and provides detailed descriptions of most major polysaccharides (cellulose, mannan, xylan, chitin-chitosan, cyclodextrines). Owing to the multidisciplinary character of the European Polysaccharide Network of Excellence (EPNOE), the book describes all main aspects of polysaccharide science and technology (biology, enzymology, physics, chemistry, materials science and processing). Notations and concepts follow a uniform format throughout the whole work in order to create a valuable reference book on the field of polysaccharide science. Owing to the major importance of industry in the EPNOE, concrete applications are also described in detail./p