Profile: Yan Jin Technology Co., Ltd. specializes in providing monomers and polymers. Our monomers include 5,5'-dihydroxy-2,2'-bipyridine, 3,3'-dinitro-4,4'-difluorobenzophenone, 3,3'-dinitro-4,4-difluorodiphenylsulfone, 3,3'-dinitro-4,4-dichlororodiphenylsulfone, bis(4-fluorophenyl)-(3-nitrophenyl)phosphine oxide and 3,3'-diamino-4,4'-difluorobenzophenone. Blocky co-polymers are prepared using either a hydrophilic or hydrophobic block through the polymerization with other monomers. Crosslinkable co-polymers contain moieties that could be crosslinked upon UV light or heat. The crosslinkable monomers include aromatic ketone or methyl groups. Block co-polymers are prepared using two pre-made blocks. The block length ranges from 3000 to 20000 g/mol.