In situ Synthesis of Inorganic and/or Organic Phases in Thermoplastic Polymers by Reactive Extrusion

Innovative polypropylene based blends by in situ polymerization of a polyimide dispersed phase by reactive extrusion

“…There are therefore limitations for conventional melt blending polyimides with other polymers, and the range of suitable polyimides is restricted by their glass transition temperatures. To overcome those issues, blends can be prepared through reactive extrusion based on the in situ polymerization of a minor phase in a thermoplastic matrix [13,14]. Specifically, in the case of polypropylene, this method has been used to polymerize in--situ a reinforcing polymer in the matrix.…”

Solvent-Free Reactive Extrusion As an Innovative and Efficient Process for the Synthesis of Polyimides

“…Based on our expertise in both reactive extrusion and polyimide synthesis ,,, and being aware that, except for the patents detailed previously, no fundamental research work dealt with the synthesis of polyimide with this specific process, we thus studied different systems based on 3,3′,4,4′-benzophenone-tetracarboxylic dianhydride (BTDA) or pyromellitic dianhydride (PMDA) as dianhydride reagents and Jeffamine D-230 as aliphatic diamine reagent. The aliphatic diamine was chosen in order to bring some flexibility to the polyimide chains and thus allowing extrusion temperatures around 200 °C.…”