ABSTRACT
The latter will be the subject of Chap. 29, whereas in this chapter, the properties of the polymers of interest will be discussed.
26.1. MOLECULAR WEIGHTS OF POLYMERS The important polymers in sustained release are (a) ethyl cellulose (Ethocel; EC), (b) hydroxypropyl methylcellulose (Methocel; HPMC), and (c) hydroxypropylcellulose (Klucel (HPC)).
