Complex sentence: The Kuhn length is a theoretical treatment, developed by Werner Kuhn, of a real polymer chain divided into N Kuhn segments with Kuhn length b, so that each Kuhn segment can be thought of as if they are freely jointed with each other.
Split into simpler sentences: The Kuhn length is a theoretical treatment, developed by Werner Kuhn, in which a real polymer chain is considered as a collection of N Kuhn segments each with a Kuhn length b. Each Kuhn segment can be thought of as if they are freely jointed with each other.