This fact shows that the appearance and increasing of single-mother family has become an inevitable social reality, and single-parent family has changed form "private trouble" to "public issues".

In those divorced family, some divorced women with children were desperated at marriage or impossible to get into marriage again, it became gradual increasing single-mothers groups .

Research of Urban Single-Parent Family Relational Character;

It is important to focus on distinguishing family murder and searchingfor witnesses.

As a hydrophilic monomer in WPU synthesis,further study on the oligomers of polyether and polyester with sulphonate group was worthy.

Cross-linked Copolymer gels were successfully prepared by copolymerization of long alkyl chain acrylic ester (hexadecyl acrylate(HA), octadecyl acrylate(ODA),) and hydrophilic monomer (acrylic acid(AA), methacrylic acid(MAA), 2-hydroxy-ethyl ester(HEA)) , using absolute ethanol as a solvent, N,N' -methylene-bis-acrylamide (MBAA) as a cross-linking agent at 50@.

The water-borne technology for polyester is reviewed with using different hydrophilic monomers, including trimellitic anhydride, dimethylmalonic acid, UV curable hyperbranched waterborne polyester, as well as sulphonate monomer.