By using methyl methacrylate (MMA) as the harder monomer, butyl acrylate (BA) as the softer monomer, acrylic acid (AA) as the functional monomer, acetoacetoxyethyl methacrylate (AAEM) as the crosslinking monomer, tert⁃butyl peroxybenzoate as the initiator, propylene glycol butyl ether as the solvent for prepared self⁃crosslinking acrylate emulsion by free radical solution polymerization and phase inversion, and the emulsion could be self⁃crosslinked after baking at high temperature without additional crosslinking agent. This article mainly studied the influence of acrylic acid, acetoacetoxyethyl methacrylate and curing time on the performance of the polyacrylic resin dispersion and the film property. The results show that the optimized formula is as follows: The dosage of AA and AAEM are 3.5% and 5.0% of the total monomer mass, respectively, and the baking time is 1.0 h at a curing temperature of 180 ℃. FT⁃IR and GPC analysis showed that AAEM was successfully attached to the molecular chain of acrylic resin; SEM and particle size analyzer analysis showed that the TG of the film is latex particles were spherical and uniformly distributed; DSC analysis showed that after the synthesized resin dispersion is significantly increased after the synthesized resin dispersion is baked at high temperature for a period of time.

Methoxypolyethylene glycols (mPEG) was first modified with succinic anhydride to obtain carboxylic acid terminated mPEG(mPEG⁃COOH). Epoxy resin emulsifier was fabricated by mixing the mPEG⁃COOH with epoxy resin, and the stable aqueous epoxy resin emulsion was obtained by phase inversion technique. The emulsifier structure, particle size distribution and the emulsion stability were characterized by infrared spectroscopy, high performance liquid chromatography and particle size analyzer. The effects of the molecular weight of mPEG, the type of epoxy resin and the emulsifier concentration on emulsion stability were carefully studied. The results showed that aqueous epoxy emulsifier and waterborne epoxy emulsion were successfully prepared. The aqueous epoxy emulsion has a particle size distribution of 0.8~1.5 μm and good emulsion stability. The obtained cured films by reacting the emulsion and amine curing agent at room temperature showed good water resistance and pollution resistance. Its water absorption rate and water loss weight loss rate were 0.35% and 0.25%, respectively.

N,N'⁃methylenebisacrylamide (MBA) is used as a crosslinking agent, octadecyl acrylate (SA) is a hydrophobic monomer, and dimethylaminoethyl methacrylate (DMAEMA) is a hydrophilic monomer. Vinyl porphyrin (MTPP) is a photothermal monomer, and PSDM⁃MTPP shape memory hydrogel with red light responsiveness was successfully prepared by free radical copolymerization. The experimental results show that a low light intensity (<528 mW/cm2) and a short irradiation time can motivate the PSDM⁃MTPP hydrogel recover to original shape. Moreover, maintaining multiple intermediate states and regioselective responses. This shape memory gel with fast response, high recovery rate, remote control and spatial selectivity has potential application value in biomedical field. The obtained shape memory hydrogel with fast response, high recovery rate, remote control and spatial selectivity provided potential application in biomedical field.