TY - JOUR
TI - Poly(urethane-acrylate) aerogels from the isocyanurate trimer of isophorone diisocyanate
AU - Maria Papastergiou
AU - Despoina Chriti
AU - Dimitrios E. Damalas
AU - Grigorios Raptopoulos
AU - Patrina Paraskevopoulou
JO - The Journal of Supercritical Fluids
PY - 2019
VL - 148
TODO - null
SP - 42--54
PB - ELSEVIER BV
SN - 0896-8446
TODO - 10.1016/j.supflu.2019.02.020
TODO - Aerogel; Isocyanurate; Isophorone triisocyanate; Polyurethane; Acrylate;
PIR-PUR
TODO - Poly(urethane acrylate) aerogels were synthesized from radical
polymerization of a dendritic monomer having an isocyanurate-based
rigid/aliphatic core, urethane linkages and nine terminal acrylate
groups. The rigidity of the core comes from the triisocyanate, an
isophorone diisocyanate trimer (IPDI). The material properties of those
aerogels were compared to the properties of related literature materials
derived from triisocyanates with flexible/aliphatic or rigid/aromatic
cores, bearing (a) three, or (b) nine terminal acrylate groups. Data
support that material properties such as the primary particle size and
the BET surface areas are determined mainly by the degree of
crosslinking (i.e., the monomer multifunctionality), while the molecular
rigidity vs flexibility of the triisocyanate core plays only a secondary
role. Addition of ethylene glycol dimethacrylate (EG) in the sol as a
chain extender increased the hydrophilicity of the aerogels and their
ability to absorb water.
ER -