2 furoyl chloride

Furan, maleic anhydride, 2-furoyl chloride (FC) and 2-aminoethanol were purchased by Tokyo Chemical Industry Co., Ltd, Tokyo, Japan. Dibutyltin dilaurate (DBTDL), hexamethylene diisocyanate (HDI), graphite, 2-hydroxyethyl methacrylate (HEMA), poly (ethylene glycol) methyl ether methacrylate Mn300 (PEGMMA) and 1,1′-(methylenedi-4,1-phenylene)bismaleimide (BM) were purchased from Sigma-Aldrich Korea Ltd, Yong-In, Korea. For the solvent, tetrahydrofuran (THF), methylene chloride (MC), n-hexane, chloroform, N,N′-dimethylformamide (DMF), methanol and toluene were purchased from Daejung Chemical & Materials Co., Ltd, Si-Heung, Korea. All of these materials were used as received. Azobisisobutyronitrile (AIBN) from Junsei Chemical Co., Ltd, Chuo-ku, Tokyo was used after the recrystallization process.

Furfuryl alcohol (FA; 98%), poly(ethylene glycol) methyl ether methacrylate(PEGMMA; average Mn = 500, contains 100 ppm MEHQ and 200 ppm BHT as inhibitor), dibutyltin dilaurate (95%), 1,1′-(methylenedi-4,1-phenylene)bismaleimide (bM; 95%) and 2-hydroxyethyl methacrylate(HEMA; contains 250 ppm monomethyl ether hydroquinone as inhibitor, 97%) were purchased from Sigma-Aldrich and used as received. 2-Furoyl chloride (FC; 98%) and 2-isocyanato ethyl methacrylate (NCO-MA, stabilized with BHT; 98%) were purchased from Tokyo Chemical Industry and used as received. α,α′-Azobis(isobutyronitrile) (AIBN; 98%) was purchased from Tokyo Chemical Industry and recrystallized with ethanol before used. Methylene chloride (MC), N,N-dimethylformamide (DMF), tetrahydrofuran (THF), n-hexane, chloroform, diethyl ether and pyridine (99.5%) were purchased from Daejung Chemicals and used after dehydration with molecular sieves.