The Effect of Bisphenol A Polyether Polyols on the Synthesis of Hydrophilic Epoxy Resins

The article uses three types of Bisphenol A polyether polyols BEO, BPO-6 and BPO-10 as raw materials, reacts with epichlorohydrin under the action of a catalyst and synthesizes a hydrophilic epoxy resin. The molecular structure of the product is analyzed by infrared spectroscopy and the results show that the synthesis of the hydrophilic epoxy resin BEOGE conforms to the results of the experimental design. The research results show that the hydrophilicity, epoxy value, tensile strength and elongation rate of cured product of BEOGE synthesized from BEO are better than those synthesized by BPO-6 and BPO-10 and the hydrophilic-lipophilic balance value of BEOGE is 6.531, which is between epoxy resin and water-based epoxy resin. It facilitates its adsorption at the oil-water interface and meets the synthesis requirements of hydrophilic epoxy resin. When tetra ethylene pen amine is used as the curing agent, the tensile strength and elongation at break of the cured product are tested. The results show that the tensile strength and elongation at break of the cured product of BEOGE are far better than those of BPOGE-6 and BPOGE-10. Among them, the BEOGE cured product has the highest tensile strength value of 0.59 MPa, which is 1.79 times that of BPOGE-6 and 4.92 times that of BPOGE-10. The elongation at break of the cured product of BEOGE is the largest at 9.9%, which is 1.87 times of that of BPOGE-6 and 1.46 times of that of BPOGE-10.