| 摘要 |
<p>A method for the removal of low molecular weight components from solid polymer resins and articles is provided. According to the method, low molecular weight components are solvent extracted from polymers, preferably in a continuous process, optionally facilitated by ultrasonification, heat, or both, wherein the polymers are comprised generally of ethylenic backbones having pendant groups selected from alkyl acrylate groups, cyclic olefinic groups, and/or benzylic groups. The solid polymer resins so treated can meet FDA requirements for food packaging applications.</p> |
