Thermosoftening Plastics PDF Download
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Author: Gülşen Akın Evingür
Publisher: BoD – Books on Demand
ISBN: 1838806121
Category : Science
Languages : en
Pages : 126
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Book Description
Thermosoftening Plastics are polymers that can be manipulated into different shapes when they are hot, and the shape sets when it cools. If we were to reheat the polymer again, we could re-shape it once again. Modern thermosoftening plastics soften at temperatures anywhere between 65 oC and 200 oC. In this state, they can be moulded in a number of ways. They differ from thermoset plastics in that they can be returned to this plastic state by reheating. They are then fully recyclable because thermosoftening plastics do not have covalent bonds between neighbouring polymer molecules. Methods of shaping the softened plastic include: injection moulding, rotational moulding, extrusion, vacuum forming, and compression moulding. The scope of this book covers three areas of thermosoftening plastics, thermoplastic materials, and their characterization. The following tests are covered in the book: thermal analysis (differential scanning calorimetry, heat deflection temperature test), optical properties tests (fluorescence spectroscopy, UV spectroscopy), and mechanical properties tests (thermogravimetry, rheometry, short term tensile test).
Author: Gülşen Akın Evingür
Publisher: BoD – Books on Demand
ISBN: 1838806121
Category : Science
Languages : en
Pages : 126
Get Book Here
Book Description
Thermosoftening Plastics are polymers that can be manipulated into different shapes when they are hot, and the shape sets when it cools. If we were to reheat the polymer again, we could re-shape it once again. Modern thermosoftening plastics soften at temperatures anywhere between 65 oC and 200 oC. In this state, they can be moulded in a number of ways. They differ from thermoset plastics in that they can be returned to this plastic state by reheating. They are then fully recyclable because thermosoftening plastics do not have covalent bonds between neighbouring polymer molecules. Methods of shaping the softened plastic include: injection moulding, rotational moulding, extrusion, vacuum forming, and compression moulding. The scope of this book covers three areas of thermosoftening plastics, thermoplastic materials, and their characterization. The following tests are covered in the book: thermal analysis (differential scanning calorimetry, heat deflection temperature test), optical properties tests (fluorescence spectroscopy, UV spectroscopy), and mechanical properties tests (thermogravimetry, rheometry, short term tensile test).
Author: Mark Lambert
Publisher:
ISBN: 9780865922693
Category : Juvenile Nonfiction
Languages : en
Pages : 54
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Book Description
Modern technology and the use of plastics.
Author: Ted Lister
Publisher: Royal Society of Chemistry
ISBN: 9780854043958
Category : Education
Languages : en
Pages : 126
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Book Description
This book is divided into three sections, dealing with the conservation of plastics, stone and wood. It provides teaching and learning materials that deal with familiar chemistry in an unfamiliar context. it also helps to show how the chemical sciences play a part in many unexpected areas of life. Many people think of objects made of plastic as 'throwaway' and do not consider them as collectable items or ones that might be found in museums. In fact there are increasing numbers of plastic objects in museums as well as in private collections and many are increasing in value. To give just one example, some Barbi (TM) dolls can change hands for thousands of pounds. it is also a misconception that plastics do not decay easily - many of them do, and this raises issues about how best to preserve them. This section is set in a context of the collection, care, identification and display of objects in museums and by private collectors. The section on stone focuses on a case study. In order to prevent damage to a stone object, conservation scientists sometiems surround the object with filter paper soaked in pure water. This is called poulticing. Conservation scientists at the British Museum wanted to investigate the poulticing process to see how effective it was at removing salts and to find out whether previous treatment of the stone affected the efficiency of the removal process. The section on wood focuses on the Mary Rose, a wooden Tudor warship that sank off Portsmouth in 1545. In 1982, the hull was raised and since then has been undergoing conservation treatment in a former dry dock at Portsmouth. Over 19,000 artefacts were recovered. The material processed here looks at the chemistry of the decay processes and the methods used to conserve the wood of the Mary Rose's hull and some of the other materials involved.
Author: Sarah J. Morath
Publisher: Cambridge University Press
ISBN: 1108841805
Category : Business & Economics
Languages : en
Pages : 213
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Book Description
Our Plastic Problem and How to Solve It considers plastic's harms and offers a spectrum of public and private solutions.
Author: Eileen Ramsden
Publisher: Nelson Thornes
ISBN: 9780748762422
Category : Juvenile Nonfiction
Languages : en
Pages : 398
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Book Description
This third edition of Key Science: Chemistry has been fully revised to meet the requirements of all 2001 GCSE specifications. It is aimed at middle-ability students, but contains enough material for high achievers. Topics are clearly differentiated between core material for GCSE science: Double-Award/Single-Award and extension material for GCSE science: chemistry.
Author: Douglas Fielding-Smith
Publisher: Heinemann
ISBN: 9780435417000
Category : Juvenile Nonfiction
Languages : en
Pages : 164
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Book Description
This text covers the OCR GCSE full and short course and supports the Certificate of Achievement. The student book includes: questions and activities; a section on coursework; and summarized key points of all the ICT requirements.
Author: Ted Lister
Publisher: Royal Society of Chemistry
ISBN: 9780854049202
Category : Education
Languages : en
Pages : 104
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Book Description
This book presents useful material in the form of teacher's notes and photocopiable worksheets. It will be useful at pre- and post-16 level.
Author: Lakhmir Singh & Manjit Kaur
Publisher: S. Chand Publishing
ISBN: 9352530241
Category : Science
Languages : en
Pages : 361
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Book Description
Lakhmir Singhs Science is a series of books which conforms to the NCERT syllabus. The main aim of writing this series is to help students understand difficult scientific concepts in a simple manner in easy language. The ebook version does not contain CD.
Author: Ann Fullick
Publisher: Heinemann
ISBN: 9780435583910
Category : Juvenile Nonfiction
Languages : en
Pages : 238
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Book Description
This resource has separate books for biology, chemistry and physics. Each book is accompanied by a teacher's resource pack on customizable CD-ROM or as a printed pack. The series is designed to work in conjunction with the Coordinated Science for AQA series, so that coordinated and separate science can be taught alongside each other.
Author: Barry Lambert
Publisher: Heinemann
ISBN: 9780435417833
Category : Juvenile Nonfiction
Languages : en
Pages : 166
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Book Description
A student book covering the coursework and requirements of the four main sections of the GCSE Design and Technology course. Includes practice examination questions.
