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Tesi etd-11252013-102136


Thesis type
Tesi di laurea magistrale
Author
AGUIRRE, JORDAN RONALD
URN
etd-11252013-102136
Title
Novel ionomeric polyurethanes with chromogenic properties.
Struttura
CHIMICA E CHIMICA INDUSTRIALE
Corso di studi
CHIMICA INDUSTRIALE
Commissione
relatore Bronco, Simona
Parole chiave
  • chromogenic
  • perylene
  • ionomer
  • polyurethane
  • DABCO
Data inizio appello
14/12/2013;
Consultabilità
completa
Riassunto analitico
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.<br>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.
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