Epoxies are an indispensable class of polymers for modern industry. These materials are so ubiquitous, in fact, that scientists and engineers from a very wide range of disciplines are likely to encounter them in quite disparate settings. In recognition of this, the present chapter is organized to suit a variety of backgrounds: chemists, physicists, materials scientists, engineers, and the like. The essential elements of epoxy chemistry are presented first, followed by a host of physical properties, and then applications. In fitting with this aim, we also provide the reader with a review of the measurement techniques relevant to characterizing these materials.
Epoxies are an indispensable class of polymers for modern industry. These materials are so ubiquitous, in fact, that scientists and engineers from a very wide range of disciplines are likely to encounter them in quite disparate settings. In recognition of this, the present chapter is organized to suit a variety of backgrounds: chemists, physicists, materials scientists, engineers, and the like. The essential elements of epoxy chemistry are presented first, followed by a host of physical properties, and then applications. In fitting with this aim, we also provide the reader with a review of the measurement techniques relevant to characterizing these materials.
How the medieval right to appoint a parson helped give birth to English common law Appointing a parson to the local church following a vacancy--an "advowson"--was one of the most important rights in medieval England. The king, the monasteries, and local landowners all wanted to control advowsons because they meant political, social, and economic influence. The question of law turned on who had the superior legal claim to the vacancy--which was a type of property--at the time the position needed to be filled. In tracing how these conflicts were resolved, Joshua C. Tate takes a sharply different view from that of historians who focus only on questions of land ownership, and he shows that the English needed new legal contours to address the questions of ownership and possession that arose from these disputes. Tate argues that the innovations made necessary by advowson law helped give birth to modern common law and common law courts.
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