By R.P. Brown
Rubber parts are utilized in many not easy functions, from tyres and seals to gloves and scientific units, and failure might be catastrophic. This assessment of rubber product failure outlines and illustrates the typical motives of failure, whereas addressing methods of keeping off it. round four hundred abstracts from papers within the Rapra Polymer Library database are integrated with an index.
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Deficiencies in design, material selection and control may have far reaching implications. In some cases a seemingly small lapse has been disastrous or at least very expensive. Summaries of papers presented at a RILEM symposium on the durability of building sealants have been published (129), which include case studies on the inspection of failed joint systems. In contrast to the number of reports of failure case studies, there are many papers on the measurement of degradation in various environments.
10 refs. 843010 Item 4 160th ACS Rubber Division Meeting - Fall 2001. ) Truck tyre durability is discussed with reference to the importance of identifying the mode, initiation point, propagation and cause of failure. e. tread separation and breaker/ply ending separation. In the development of new compounds, it is important to consider the operating conditions (strain/stress/temp. levels) of the component in the running tyre. The use of compound fracture mechanical behaviour measurements in the development of sidewall compound with improved cut initiation/propagation resistance is described.
5 refs. 10 NEW FOR THE 21ST CENTURY: IT’S A GAS Fisher P J It is claimed that the new technological advancement in tyres may be the use of nitrogen instead of air to inflate tyres. As air migrates through the tyre liner at a rate of about 2psi per month, it is carrying moisture with it which contaminates the steel and initiates the growth of rust in the steel body plies. Oxygen also reacts with rubber, oxidizes it and can make it less flexible and weaker. Nitrogen permeates the tyre 30-40% slower than the oxygen in the air and does not carry any water.