Supervisor of thesis

Aktiviteetti: TutkimustyypitVäitöskirjan ohjaaja tai sivuohjaaja

Kuvaus

The work began by developing a polymerisation method based on a thermal initiator and heating. This method replaced the earlier method based on using gamma irradiation (Sammaljärvi 2012, Sammaljärvi 2014). The next step is the investigation on the viability of different monomers. The emphasis here will be on the co-polymerisation of HEMA and MMA and their application on water containing matrices. HEMA is soluble both in water and MMA and therefore, it is expected that monomer mixture could also penetrate into fractures filled water or only partially dried. HEMA does have higher viscosity than MMA and has swelling potential, which presents its on challenges. Higher viscosity is planned to be overcome by using pressurised impregnation chambers but swelling potential needs to be investigated individually for the different sample materials. Co-polymerisation of DMAEMA and MMA is another topic of interest. DMAEMA is also water soluble, depending on the pH, but can also be hydrophobic in low pH, which could have use for clay characterisation. The suitability of alternative initiators, such as AIBN (Azobisisobutyronitrile) is under investigation. Because different monomers are used, it is also prudent to evaluate the effectiveness of different initiators and initiation methods.

CHEMS

Title of thesis: Development of polymerisation technologies for characterisation of natural and artificial hard materials
Aikajakso20112016
TutkittavaJuuso Sammaljärvi
Tutkimuksen ajankohtaUniversity of Helsinki