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Thermoplastic elastomers (TPEs) have the elastic behaviour of rubber and the processability of thermoplastics. The Freedonia Group has forecast that demand will expand by 6.4% per year to around 2.15 million tons in 2006. There is potential for these new, exciting materials to expand into the much larger thermoset rubber markets. This review includes comparisons between the two material types. There are three major types of TPE: block copolymers, rubber/plastic blends and dynamically vulcanised rubber/plastic alloys known as thermoplastic vulcanisates. The chemistry of these materials and how.
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Online and Social Networking Communities is a professional guide written for educational practitioners and trainers who wish to use online communication tools effectively in their teaching. Focusing on the student experience of learning in online communities, it addresses ‘web 2.0’ and other ‘social software’ tools and considers the role these technologies play in supporting student learning and building learning communities. The guide offers: real-world case studies and quality research must-have lists of useful resources guidance on building and supporting online learning communities discussion of how collaborative learning can be assessed coverage of wikis, forums, blogging, instant messaging, Second Life, Twitter, desktop videoconferencing and social networking sites such as Facebook. Online and Social Networking Communities helps educators and trainers develop a critical approach by exploring online learning from both the student’s and educator’s perspective. This practical guide provides the tools to help develop confident and thoughtful online educators, able to create successful and enjoyable learning experiences for their students.
I will plant in the wilderness the cedar the acacia-tree and the myrtle and the oil-tree; I will set in the desert the cypress, the plane-tree and the larch together; That they may see, and know and consider and understand together, That the hand of the Lord hath done this, ••• Isaiah, 41:19 and 20 (first portion) The need to improve our utilization of the Earth's natural resources is everyone's business, from every country. This book presents papers from all parts of the world on the subject of making new or improved polymers from renewable resources, be they plastics, elastomers, fibers, coatings, or adhesives. In important ways, this book constitutes part II of an edited work publis...