Semi‐suspension polymerization process

摘要

AbstractA novel heterogeneous polymerization process for synthesizing particulate with a wide range of properties has been developed. This process, which is called semi ‐ suspension polymerization (SSP), consists of two steps. In the first step a mixture of monomer, polymer, initiator, and other required ingredients is prepared by means of a non‐ suspension polymerization process. In the second step, this mixture is suspended in the continuous phase and is polymerized to complete conversion. The properties of the semi‐polymerized mixture prepared in the first step as well as the rate of polymerization in the second step can be used to control inter‐droplet and/or intra‐particle mass transfer. This unique capability allows control of the mass transfer between and within particles during the suspension polymerization, thereby enabling synthesis of particulate with a wide range of molecular properties and morphologies unattainable by conventional suspension polymerization. The characteristics of this process and its advantages/limitations will be