All the reactants with 97–99% purity
and 2,2-azobis(2-methylpropionitrile) (AIBN) with 98% purity and anhydrous
sodium sulfate (Na2SO4, > 99.0% purity) used
for synthesis and polymerization are purchased from Adamas, unless
otherwise stated specifically. Dichloromethane (99.5% purity), ethyl
acetate (EA, 99.5% purity), Petroleum ether (60–90 °C
boiling point, AR), N,N-dimethylformamide
(DMF, 99.5% purity), were purchased from Greagent Company. Methyl
ethyl ketone (MEK; AR grade) was purchased from Guangzhou Chemical
Reagent Factory. Tetrahydrofuran (THF; > 99% purity) was purchased
from Thermo Fisher Scientific. Desmodur N3300, a commercial product
containing isocyanate oligomer of hexamethylene diisocyanate, was
purchased from Bayer. All chemicals were used without further purification.
and 2,2-azobis(2-methylpropionitrile) (AIBN) with 98% purity and anhydrous
sodium sulfate (Na2SO4, > 99.0% purity) used
for synthesis and polymerization are purchased from Adamas, unless
otherwise stated specifically. Dichloromethane (99.5% purity), ethyl
acetate (EA, 99.5% purity), Petroleum ether (60–90 °C
boiling point, AR), N,N-dimethylformamide
(DMF, 99.5% purity), were purchased from Greagent Company. Methyl
ethyl ketone (MEK; AR grade) was purchased from Guangzhou Chemical
Reagent Factory. Tetrahydrofuran (THF; > 99% purity) was purchased
from Thermo Fisher Scientific. Desmodur N3300, a commercial product
containing isocyanate oligomer of hexamethylene diisocyanate, was
purchased from Bayer. All chemicals were used without further purification.
