Plastik og polymerer

Where did the Aryans come from originally? Did they invade India? Or were they actually Indian invaders who colonized Greece?In India in Greece, E. Pococke explores the theory that the Aryans may have originally travelled from India to Greece, colonized the latter and influenced the culture there. Centuries later, they came back to India. Covering topics as diverse as the sources of the Hellenic Race, the colonization of Egypt and Palestine, the wars of the Grand Lama and the Bud'hist propaganda in Greece, the author tries to show that at some point in history, India and Greece were closely associated.

This book is a comprehensive introduction to all aspects of self-reinforced polymer composites (SRCs) science and technology. After introducing the fundamental characteristics of SRCs, ample space is given to manufacturing, processing, characterization and application techniques. The approach is didactic and focused on formulations, illustrations and applications, which makes the book ideal for students, teachers and practitioners alike.

Explains how to choose the best processing method, what fastening or joining methods can be used, and how to use the characteristics of a plastic to judge its suitability for an application. Covers all major contemporary molding processes. Discusses, in detail, important topics such as surface finish and special effects.

The goal of the book is to assist the designer in the development of parts that are functional, reliable, manufacturable, and aesthetically pleasing. Since injection molding is the most widely used manufacturing process for the production of plastic parts, a full understanding of the integrated design process presented is essential to achieving economic and functional design goals. Features over 425 drawings and photographs.

Co-rotating twin-screw extruders are extensively used for the preparation, compounding, mixing, and processing of plastics, but also in other industry branches, such as in rubber and food processing, and increasingly in the pharmaceutical industry too. Derived from the classic, bestselling work "Co-Rotating Twin Screw Extruders", this book brings much of the content up to date, with an expanded focus on the fundamentals of co-rotating twin-screw extrusion, including functional zones in the extruder, screw elements, material behavior, flow properties, performance behavior, and application of computational fluid dynamics.Co-rotating twin-screw machines usually have modular configurations and are thus quite flexible for adapting to changing tasks and material properties. Well-founded knowledge of machines, processes, and material behavior is required in order to design and operate twin-screw extruders for economically successful operations. With chapters written by many expert authors from industry and academia, this book provides valuable information on applications from a practical perspective, suitable for both beginners and experienced professional engineers.Also derived from the classic bestselling work "Co-Rotating Twin Screw Extruders", the second book focuses on the application and machine technology of co-rotating twin-screw extrusion. It includes functional zones in the extruder, scale-up and scale-down, machine technology, and many application examples from a broad range of areas.

Plasticitetsteori - tværsnit, bjælker, rammer og plader omhandler den grundlæggende plasticitets-teori og dens anvendelse på snitkraftoptagelse, plane plastiske bjælker og rammer og plastiske plader. Flydebetingelser og flydelov behandles for stift plastiske materialer. Diskontinuitetslinier (også kaldet glidelinier og flydelinier) gennemgås og ligeså det indre arbejde for diskontinuitetslinier i forskellige materialer, og der vises eksempler på deres anvendelse. Ekstremalprincipperne, det vil sige principperne for at finde nedre- og øvreværdier for bæreevner, forklares, og principperne anvendes til beregning af bæreevner for tværsnit med forskel-lige snitkræfter og kombinationer heraf. Plane, plastiske bjælker og rammer beregnes ligeledes med nedre- og øvreværdier, og det samme gøres for plader. For pladers vedkommende er der vednedreværdierne specielt lagt vægt på strimmel-metoden. Her opdeles plader i strimler - ofte krydsende strimler - og beregnes ved at se bort fra vridningsmomenter, hvorved beregningerne bliver analoge til bjælkeberegninger. Der er også angivet nedreværdimetoder for rektangulære plader, hvor vridningsmomenter er medregnet, og endelig er også øvreværdimetoden, der er identisk med den klassiske brudlinieteori, medtaget. Bogen er skrevet let tilgængelig og med mange eksempler og opgaver. I samme serie findes: Betonkonstruktioner efter DS 411 Stålkonstruktioner efter DS 412 Bygningsberegninger efter DS 409 og DS 410

PlastTeknologi er den dækkende og overskuelige lærebog til plastmageruddannelsen. Den beskriver udførligt de forskellige forarbejdningsprocesser i plastindustrien, ligesom plastmaterialernes egenskaber bliver gennemgået i de indledende kapitler.PlastTeknologi er skrevet i et letlæseligt sprog, og teksten er overalt ledsaget af farvelagte illustrationer, der understøtter indlæringen.PlastTeknologi er også en opslagsbog. Den kan derfor anvendes alle steder, hvor der er brug for en lettilgængelig viden om plast.

Polymer science is fundamentally interdisciplinary, yet specialists in one aspect, such as chemistry or processing, frequently encounter difficulties in understanding the effects of other disciplines on their own. This book describes clearly how polymer chemistry and polymer processing interact to affect polymer properties.