文獻(xiàn)名： Green synthesis and properties of an epoxy-modified oxidized starch-grafted styrene-acrylate emulsion

 

作者： Shaoxiang Li^a,b,c, Jiaping Wang^a,b,c, Wenjuan Qu^a,b,c, Jiaji Cheng^a,b,c, Yunna Lei^a,b,c, Dong Wang^a,b,c, Feng Zhang^a,b

a    College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China

b    Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, Qingdao University of Science and Technology, Qingdao 266042, PR China

c    Shandong Engineering Technology Research Center for Advanced Coating, Qingdao University of Science and Technology, Qingdao 266042, PR China

 

摘要：An epoxy-modified oxidized starch-grafted styrene-acrylate (E-g-OS-P (BA-St)) emulsion was synthesized via soap-free core-shell emulsion polymerization without adding any solvent that could cause environmental problems. The emulsion exhibited excellent stability, chemical properties and mechanical performance. The synthesized emulsion was characterized by Fourier transform infrared spectroscopy (FTIR) and 13C NMR spectroscopy. Transmission electron microscopy (TEM) suggested that the OS-P (BA-St) latexes had certain umbrella structures and that the epoxy resin cross-linked a plurality of umbrella structures. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) showed that the thermal stability and glass transition temperature (Tg) of the polymer became higher as the content of epoxy resin increased. Atomic force microscopy (AFM) was utilized to characterize the surface morphology of the films. The film with 10% epoxy resin (based on the mass of monomers) possessed superior tensile strength and elongation, exhibiting a nearly 100% increase in tensile strength relative to that of neat latexes without epoxy. Additionally, the mechanism of polymerization and film formation of the E-g-OS-P (BA-St) emulsion were analysed.