Download or read book Thermoplastic Natural Rubbers Based on Natural Rubber NR and Ethylene Vinyl Acetate Copolymer EVA with Natural Rubber graft Poly dimethyl methacryloyloxymethyl phosphonate NR g PDMMMP as Compatibilizer written by Punyanich Intharapat and published by . This book was released on 2009 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt: Graft copolymers of natural rubber and poly(dimethyl(acryloyloxymethyl)phosphonate) (NR-g-PDMAMP), natural rubber and poly(dimethyl(methacryloyloxyethyl)phosphonate) (NR-g-PDMMEP), and natural rubber and poly(dimethyl(methacryloyloxymethyl)phosphonate) (NR-g-PDMMMP), were prepared in latex medium via a "grafting from" methodology based on the photopolymerization of vinyl monomers initiated from N,N-diethyldithiocarbamate groups previously bound in side position of the 1,4-polyisoprene chains of natural rubber. Thereafter, compatibilization studies of natural rubber (NR) / ethylene vinyl acetate copolymer (EV A) blends were considered using NR-g-PDMMMP as a blend compatibilizer. The investigations were carried out on two categories of blends : uncured 50/50 and dynamically cured 40/60 NR/EV A blends. ln the two cases, the influences of NR-g-PDMMMP grafting rates (i.e., 71, 80, 89, and 95 %) and of loading level in compatibilizer (i.e., 0, 1,3,5,7,9,12, and 15 wt% compared to NR) on rheological, dynamical, mechanical, morphological, and thermal properties, were studied. The best compatibilization effects were observed with a NR-g-PDMMMP having a grafting rate equal to 80 %, at a loading level of 7 wt% for 50/50 uncured blend and 9 wt% for 40/60 dynamically cured blend. In these conditions, the highest complex viscosity (positive deviation), tensile strength, and elongation at break, as well as the lowest values of tension set and tan d (damping factor), were observed. SEM micrographs of compatibilized blends showed a size decrease of the domains. It was also noted that the thermal stability of NR/EV A blends was improved by incorporating NR-g-PDMMMP.
Download or read book Handbook of Engineering and Specialty Thermoplastics Volume 3 written by Sabu Thomas and published by John Wiley & Sons. This book was released on 2011-04-28 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book summarizes many of the recent technical research accomplishments in the area of engineering polymers, such as oxygen containing main chain polymers (Polyether and Polyesters). The book emphasizes the various aspects of preparation, structure, processing, morphology, properties and applications of engineering polymers. Recent advances in the development and characterization of multi component polymer blends and composites (maco, micro and nano) based on engineering polymers are discussed in detail. The content of the book is unique as there are no books which deal with the recent advances synthesis, morphology, structure, properties and applications of engineering polymers and their blends and composites including nanocomposites. It covers an up-to-date record on the major findings and observations in the field.
Download or read book Thermoplastic Elastomers from Rubber plastic Blends written by S. K. De and published by Prentice Hall. This book was released on 1990 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Rubber Materials written by Sabu Thomas and published by Royal Society of Chemistry. This book was released on 2014 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive two volume set covering the synthesis, characterization and applications of natural rubber based blends, interpenetrating polymer networks, composites and nanocomposites.
Download or read book Clay containing Polymeric Nanocomposites written by L. A. Utracki and published by iSmithers Rapra Publishing. This book was released on 2004 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is Part 1 of a two-part set. Part 2 ISBN is 1859574823
Download or read book Speciality Rubbers written by J. A. Brydson and published by iSmithers Rapra Publishing. This book was released on 1994 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Speciality rubbers account for 15% of world rubber consumption in financial terms in spite of providing just 4% by c099. Their most important property is generally a high heat resistance, frequently required in combination with hydrocarbon oil resistance. Other key properties may include flexibility at low temperatures and long service life. 400 Abstracts from the Rapra Polymer Library.
Download or read book Thermoplastic Natural Rubber written by Maswanee Narathichat and published by LAP Lambert Academic Publishing. This book was released on 2011-10 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers (TPEs) are rubbery materials with properties and functional performance similar to those of conventional vulcanized rubber. Interest in natural rubber (NR) and thermoplastic blends (TPNRs) has also been increased recently. By blending with polar thermoplastics such as polyamide-12 (PA-12), epoxidized natural rubber (ENR) is one of the modified NR forms used to prepare TPNRs which improves compatibility of the polymer pairs. Blend compatibility was promoted because of interaction between oxirane rings in ENR and polar functional groups in polyamide molecules (i.e. -NH2, -COOH, -NH-CO-) and hence the blend properties. Temperature scanning stress relaxation (TSSR) measurement revealed an improvement in stress relaxation behaviour and thermal resistance of the blends with ENR. Moreover, it is possible to apply the TSSR to determine the compatibility of the blends based on the temperature coefficient ( .max) value in combination with ATR-FTIR technique.
Download or read book Natural Rubber written by Janet L. Hamilton and published by Nova Science Publishers. This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural Rubber (NR) is a renewable polymer endowed with remarkable properties including its high elasticity and high film forming capacity, properties that enable its use in a wide range of applications. In this book, Chapter One reviews properties, behavior and uses of NR. Chapter Two discusses NR properties and conventional applications, as well the development of new thermo-reversible cross linked NR. Chapter Three evaluates samples of natural rubber latex using a coaxial cylinder rheometer and, as from the data obtained, propose a model to determine the flow energy at different total solids contents. Chapter Four provides a review of the past, present and future perspectives of the vulcanization of natural rubber. Chapter Five investigates the effect of increasing MMT loading levels on the physico-mechanical properties of EVA/ devulcanized rubber (DVC rubber) blends. Chapter Six discusses in detail the parameters and conditions that could influence the degradation reaction of NR latex in the presence of hydrogen peroxide and UV light. Chapter Seven focuses specifically on the use of metal and metal oxide particles in NR, epoxidized natural rubber (ENR) and their respective blends reported between 2010 to 2015.
Download or read book Thermoplastic Elastomers written by Günter Scholz and published by Walter de Gruyter GmbH & Co KG. This book was released on 2021-08-02 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a qualified and fast view into the world of TPE including the difference to rubber materials. It describes their classification as they are presented in the market, characterization, manufacturing, processing and behavior. Aside from the self-learning option, it is a companion to seminars and studies about elastomers.
Download or read book Blends of Natural Rubber written by A. J. Tinker and published by . This book was released on 1998 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction> the book and rubber blends; Measurement of crosslink density in vulcanized blends; Characterization of vulcanized blends by microscoy; Estimation of crosslink density by solid-state NMR spectroscopy; NR/NMR blends: basic problems and solutions; Improving the morphology and properties of NR/NBR blends with NR/PMMA graft copolymers; Improving the morphology and properties of NR/NBR blends with polychlorprene as the compatibilizaing agent; NR/NBR blends: compounding for food contact applications; Novel natural rubber/ethylene propylene copolymer; Natural rubber/ENR-25 blends; Partition coefficients for an ester platicizer in black-filled blends; Improving resistance to low temperature crystallization in NR/ENR-25 blends; Compounding NR/ENR-25 and NR/Hv-BR/ENR-25 blends for engineering applications; Solutions to the basic problems of poor physical properties of NR/EPDM blends; Compounding NR/EPDM blends for tyre sidewalls; Compounding NR/EPDM blends for light-coloured applications; NR/EPDM blends for extruded profile weatherstrip; glossary; Index.
Download or read book Thermoplastic Elastomers written by Chapal Kumar Das and published by BoD – Books on Demand. This book was released on 2015-11-26 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermoplastic elastomers (TPEs), commonly known as thermoplastic rubbers, are a category of copolymers having thermoplastic and elastomeric characteristics. A TPE is a rubbery material with properties very close to those of conventional vulcanized rubber at normal conditions. It can be processed in a molten state even at elevated temperatures. TPEs show advantages typical of both rubbery materials and plastic materials. TPEs are a class of polymers bridging between the service properties of elastomers and the processing properties of thermoplastics. Nowadays, the best use of thermoplastics is in the field of biomedical applications, starting from artificial skin to many of the artificial human body parts. Apart from these, thermoplastic elastomers are being used for drug encapsulation purposes, and since they are biocompatible in many cases, their scope of applications has been broadened in the biotechnological field as well. The present book highlights many biological and biomedical applications of TPEs from which the broader area readers will benefit.
Download or read book Natural Rubber written by M.R. Sethuraj and published by Elsevier. This book was released on 2012-12-02 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: No other book on natural rubber covers such a broad spectrum of subjects as this unique publication. Subjects related to the biology, cultivation and technology of natural rubber are dealt with, along with such important aspects as its history, production and processing, through to its sophisticated engineering applications. Every chapter follows a monograph style of presentation, with comprehensive citations and depth of treatment. Contributions from highly experienced, and still active, renowned scientists reflect the truly international effort to the development of this commodity. In addition to the wealth of information presented, most of the chapters contain elaborate lists of earlier contributions in the respective fields; one chapter each has been included on rubber wood, ancillary products and guayule.
Download or read book Natural Rubber and the Synthetics written by Peter William Allen and published by John Wiley & Sons. This book was released on 1972 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastomers written by Source Wikipedia and published by University-Press.org. This book was released on 2013-09 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 34. Chapters: Butyl rubber, Carbon black, Cold rubber, Elastin, Elastomer, EPDM rubber, Ethylene-vinyl acetate, FKM, Flexible tanks, Fluoroelastomer, Gough-Joule effect, Hypalon, Injection molding of liquid silicone rubber, Medical grade silicone, Natural rubber, Neoprene, Nitrile rubber, Ozone cracking, Polybutadiene, Polyether block amide, Resilin, RTV silicone, Silastic, Styrene-butadiene, Synthetic rubber, Thermoplastic polyurethane, Viton. Excerpt: Natural rubber, also called India rubber or caoutchouc, as initially produced, consists of suitable polymers of the organic compound isoprene with minor impurities of other organic compounds plus water. Forms of polyisoprene that are useful as natural rubbers are classified as elastomers. Currently the rubber is harvested mainly in the form of the latex from certain trees. The latex is a sticky, milky colloid drawn off by making incisions into the bark and collecting the fluid in vessels. This process is called "tapping." The latex then is refined into rubber ready for commercial processing. Natural rubber is used extensively in many applications and products, either alone or in combination with other materials. In most of its useful forms it has a large stretch ratio, high resilience, and is extremely waterproof. The major commercial source of natural rubber latex is the Para rubber tree (Hevea brasiliensis), a member of the spurge family, Euphorbiaceae. This species is widely used because it grows well under cultivation and a properly managed tree responds to wounding by producing more latex for several years. Many other plants produce forms of latex rich in isoprene polymers, though not all produce usable forms of polymer as easily as the Para rubber latex does; some of them require more elaborate processing to produce anything like usable rubber, and most are more...
Download or read book Natural Rubber Grafted Styrene methyl Methacrylate as Impact Modifier for Poly vinyl Chloride written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Graft copolymer of styrene and methyl methacrylate onto natural rubber was synthesized by emulsion polymerization using cumene hydroperoxide and tetraethylene pentamine as a redox initiator. Statistical analysis, two-level factorial design, was used to study the influence of four process variables and the interaction of these process variables. The process variables were initiator concentration, reaction temperature, ratio of styrene to methyl methacrylate, and ratio of monomer to natural rubber. The two-level factorial experimental design showed that initiator concentration, reaction temperature, and ratio of monomer to natural rubber had a significant effect on grafting efficiency. Reaction temperature and ratio of monomer to natural rubber had a significant effect on percentage graft copolymer. The grafted natural rubber was characterized by FT-IR spectroscopy and the particle morphology was determined by transmission electron microscopy. The grafted natural rubber product could be used as an impact modifier for PVC, thus, blends of the grafted natural rubber products and PVC were prepared. The mechanical properties, thermal properties, and morphology of the grafted natural rubber modified PVC were investigated as a function of grafted natural rubber content.
Download or read book A Review of the Prospects for Natural Synthetic and Reclaimed Rubber written by International Rubber Study Group and published by . This book was released on 1964 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natural Rubber Based Thermoplastic Elastomers written by A. J. Tinker and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
