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

Informacje na temat projektu

SUPERPOL

Identyfikator umowy o grant: BRPR970503

Projekt został zamknięty

Data rozpoczęcia 1 Grudnia 1997

Data zakończenia 30 Listopada 2000

Finansowanie w ramach

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

Koszt całkowity

Brak danych

Wkład UE

Brak danych

Koordynowany przez

Aristotle University of Thessaloniki
Greece

CORDIS oferuje możliwość skorzystania z odnośników do publicznie dostępnych publikacji i rezultatów projektów realizowanych w ramach programów ramowych HORYZONT.

Odnośniki do rezultatów i publikacji związanych z poszczególnymi projektami 7PR, a także odnośniki do niektórych konkretnych kategorii wyników, takich jak zbiory danych i oprogramowanie, są dynamicznie pobierane z systemu OpenAIRE .

Rezultaty

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.

Wyniki nadające się do wykorzystania

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.