Green Processes for Green Products: The Use of Supercritical CO2 as Green Solvent for Compatibilized Polymer Blends

Iqbal, M., Mensen, C., Qian, X. & Picchioni, F., 19-Nov-2018, In : Polymers. 10, 11, 15 p., 1285.

Research output: Contribution to journalArticleAcademicpeer-review

Polycaprolactone-g-glycidyl methacrylate (PCL-g-GMA), a reactive interfacial agent for PCL-starch blends, is synthesized using supercritical carbon dioxide (scCO(2)) as reaction medium and relatively high molecular weight PCL (M-w = 50,000). Higher GMA and radical initiator intakes lead to higher functionalization degrees (FD) for PCL-g-GMA samples. A mathematical model is developed to describe the correlation between monomer and initiator intake and FD values. The model shows an excellent R-2-value (0.978), which implies a good fit of the experimental data. Comparison of this model with a similar one for the reaction in the melt clearly indicates a better reaction efficiency in scCO(2). Furthermore, GPC results show that less degradation occurred for samples made in scCO(2). Finally, the use of the PCL-g-GMA made in scCO(2) (as interfacial agent) in ternary blend of PCL/starch/PCL-g-GMA results in better mechanical properties with respect to those obtained by using the same graft-copolymer as prepared in the melt.

Original languageEnglish
Article number1285
Number of pages15
Issue number11
Publication statusPublished - 19-Nov-2018


  • starch, polycaprolactone, glycidyl methacrylate, compatibilization, supercritical carbon dioxide, mechanical properties, CARBON-DIOXIDE, GLYCIDYL METHACRYLATE, REACTIVE BLENDS, STARCH, POLYPROPYLENE, POLYCAPROLACTONE, POLYESTERS, ANHYDRIDE

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