Polymerization and polymer modification in supercritical fluids - a novel way for cleaner manufacturing of plastics

Projektinformationen

SUPERPOL

ID Finanzhilfevereinbarung: BRPR970503

Projekt abgeschlossen

Startdatum 1 Dezember 1997

Enddatum 30 November 2000

Finanziert unter

• Specific research and technological development programme in the field of industrial and materials technologies, 1994-1998

Gesamtkosten

Keine Daten

EU-Beitrag

Keine Daten

Koordiniert durch

Aristotle University of Thessaloniki
Greece

CORDIS bietet Links zu öffentlichen Ergebnissen und Veröffentlichungen von HORIZONT-Projekten.

Links zu Ergebnissen und Veröffentlichungen von RP7-Projekten sowie Links zu einigen Typen spezifischer Ergebnisse wie Datensätzen und Software werden dynamisch von OpenAIRE abgerufen.

Leistungen

Process for the gamma rays initiated dispersion polymerization of vinyl monomers in CO2-based dense systems under mild conditions

Gamma-rays are effective in the dispersion polymerization of vinyl monomers such as methyl methacrylate (MMA) and 1,1 difluoroethylene (VF2) in CO(2)-based dense systems: the most relevant advantages by the use of this initiation method lie both in the possibility to have a very pure starting system and to operate at very mild temperature and pressure conditions. Moreover, y-rays sustain the polymerization up to high conversion in short reaction times. The obtained polymer has a very high average molecular weight with a narrow distribution and a high degree of molecular complexity (branching and/or cross-linking) depending on the nature of the surfactant and on the adopted radiation intensity ; with a proper selection of the operative conditions the polymer properties (molecular weight and rheological behavior) are comparable to those obtained in conventional polymerizations carried out in the presence of AIBN at higher temperatures.

Verwertbare Ergebnisse

Modification of polymers using supercritical carbon dioxide as a swelling and solvent agent

Grafting of maleic anhydride onto polyolefins (iPP and EPR) in the presence of organic peroxide as a free radical source was performed using scCO2 as a swelling agent to deliver inside the matrix the initiator and the carbonyl compound. Grafting level comparables to that obtained with conventional processes was reached without significant degradation of the polymers. The efficacy of modified iPP as a compatibilizer in the preparation of polypropylene polyamide blends was verified.