Tipo di tesi
Tesi di laurea magistrale
Titolo
Novel ionomeric polyurethanes with chromogenic properties.
Dipartimento
CHIMICA E CHIMICA INDUSTRIALE
Corso di studi
CHIMICA INDUSTRIALE
Parole chiave
- chromogenic
- DABCO
- ionomer
- perylene
- polyurethane
Data inizio appello
14/12/2013
Riassunto (Italiano)
A series of polyurethanes are synthesized from traditional components, HDI and PEG-1500. A novel ionomer, DABCO(OH)2, is included in reaction feeds, yielding ionomeric polyurethanes. PzPer, a water-dispersible and aggregachromic dye, is dispersed at low to very low loadings (0.50 to 0.01% wt). Polymers synthesized are characterized by 1H-NMR, solubility tests, GPC, FTIR, DSC, and TGA. Samples with dye dispersed are studied by exposure to solvents, and by fluorescence spectroscopy.
Characterization results show that polymers synthesized are typical polyurethanes, while the amount of ionomer incorporated does not exceed 1.5% mol of total composition. Studies on chromogenicity indicate increase in emission intensity and simultaneous increase in aggregation; correlation with results in literature suggests strong chromophore aggregates, attributable to polar environment.
