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PROCESS FOR PREPARATION OF MONO DISPERSED CRYSTALLINE PARTICLES FROM AMORPHOUS POLYMERS

IP.com Disclosure Number: IPCOM000023609D
Original Publication Date: 1978-Jun-30
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal

Abstract

Process for preparation of monodispersed crystalline particles from amorphous crystallizable polymers. In this process, an amorphous polymer of an inorganic glass, such as selenium, or of organic polymer, such as a polyester, is initially con-tacted with a crystal-inducing fluid under certain specified conditions. Concurrent with such contact the crystallizable polymer is subjected to physical and/or ultrasonic forces, This combination of steps results in the substantially com-plete conversion of the amorphous polymer to monodispersed crystalline particles. In the case of crystallization of amorphous selenium, this process is directive for preparation of the corresponding triclinic crystalline form of this material,