Softening point

The '''softening point''' is the temperature at which a material softens beyond some arbitrary softness.<ref> {{cite book |last = Petrie |first = Edward |author-link = Edward M. Petrie |title = Handbook of Adhesives and Sealants |url = https://archive.org/details/handbookadhesive00petr |url-access = limited |page = [https://archive.org/details/handbookadhesive00petr/page/n172 146] |publisher = McGraw-Hill |year = 2006 |isbn = 0-07-147916-3}} </ref> It can be determined, for example, by the Vicat method (ASTM-D1525 or ISO 306), Heat Deflection Test (ASTM-D648) or a ring and ball method (ISO 4625 or ASTM E28-67/E28-99 or ASTM D36 or ASTM D6493 - 11 or JIS K 6863). A ring and ball apparatus can also be used for the determination of softening point of bituminous materials.<ref>{{cite web|title=Softening Point / Ring & Ball Apparatus|url=http://cooper.co.uk/product-category/bitumen-testing/softening-point-ring-and-ball-method/|website=cooper.co.uk|publisher=Cooper Research Technology Ltd.|accessdate=16 July 2015}}</ref>

==See also== * Glass Transition Temperature

==References== <references/>

Category:Temperature Category:Polymer chemistry Category:Glass physics

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