Continuous devulcanisation process

A group at Jiangsu Polytechnic University [17,18] have used a twin-screw extruder to continuously devulcanise scrap tyre rubber and have studied the influence that screw speed and process temperature have on the degree of devulcanisation and the physical properties of the material once it had been revulcanised. A scanning electron microscope (SEM) was also used to study the morphology of the DR... 

The types of processing and physical property tests that are required to assess the important characteristics referred to above are also continually cited in the later sections of this book dealing with the use of waste rubber crumb in rubber products, thermoplastics, and thermosets, for the same reasons (Chapter 7). Many other specific property tests (e.g., acoustic) are also referred to in this book but, unfortunately, there is insufficient space here to cover them. A reasonably detailed section on the characterisation of rubber crumb is provided in Chapter 6, Section 6.4, because understanding the nature of this material is as important as understanding the properties of devulcanised rubber when it comes to its re-use applications. 

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