When they are cool, the first component is of a harder plastic material than the second.
But Must Try Harder—An Assessment by the Sustainable Development Commission of the Government's Reported Progress on Sustainable Development Over the Past Five Years; Sustainable Development Commission: London, UK, April 2004. 17. Kavanagh, D.; Richards, D. Departmentalism and Joined-Up Government...
As thoroughly discussed in the following, the higher polarisability of the sulphide anion with respect to the harder (in Pearson's terms, [62]) oxide counterparts enables also the formation of layered structures, such as MoS2 or WS2, based on van der Waals interactions among the layers. The...