丙烯酸共聚改性液态丙烯酸酯树脂及其复合材料力学性能研究OA北大核心

In order to solve the problem of insufficient tensile strength of acrylate resin and its weak bonding with fiber interface.In this paper,liquid acrylate low polymerization resin(AOLM)was modified by copolymeriza-tion of acrylic acid(AAc)to significantly improve the overall mechanical properties of the resin matrix and its glass fiber(GF)reinforced composites after curing by increasing the intermolecular force of polyacrylate resin matrix(PAOLM).The results show that the introduced AAc causes the appearance of vibrational absorption peaks for in-tramolecular hydrogen bonding(3 545 cm-1)and intermolecular hydrogen bonding(3 294 cm-1)in the infrared spectrogram of PAOLM.Compared with the unmodified PAOLM,the tensile strength and modulus of resin P(AOLM-AAc)are improved by 20.86%and 32.65%,respectively.The bending strength and modulus are increased by 18.14%and 25.73%,respectively.The impact toughness is improved by 24.03%,and the glass transition temper-ature is increased by 10.03%after copolymerization modification.Compared with the composite with AOLM(GF/PAOLM),the tensile strength and flexural strength of the composite with AAc-modified AOLM[GF/P(AOLM-AAc)]are increased by 11.62%and 37.18%,respectively.