低黏度芳香族超支化环氧树脂对三酚基甲烷型环氧树脂性能的影响

Effect of Low Viscosity Aromatic Hyperbranched Epoxy Resin on Properties of Tri(4-Hydroxypheny) Methane Epoxy Resin

为了降低三酚基甲烷型环氧树脂(TMP)的黏度,通过不同的合成工艺得到了低黏度芳香族超支化环氧树脂(AHBP),采用傅里叶变换红外光谱仪对其表征。将AHBP作为TMP稀释剂,研究了AHBP加入量对TMP/甲基纳迪克酸酐(MNA)体系性能的影响,并与传统稀释剂1,4-丁二醇二缩水甘油醚(BDDGE)进行比较。采用热重分析仪及电子万能试验机对其性能测试。当AHBP含量为15%时,体系黏度为2800 m Pa·s左右,拉伸强度、弯曲强度、冲击强度分别提高了12%,13.2%,40%,起到了增韧效果,热失重5%时温度为313.9℃;而BDDGE/TMP/MNA体系的力学性能及热性能下降显著。结果表明相对于BDDGE,AHBP在不降低TMP力学性能的情况下能较好地降低TMP黏度。

To reduce viscosity of tri（4-hydroxypheny） methane epoxy resin（ TMP）,aromatic hyperbranched epoxy resin（ AHBP） with low viscosity was synthesized by different processes. The structure of AHBP was characterized by Fourier transform infrared spectroscopy（ FT-IR）. Then as the diluent of TMP,the influences of the AHBP amount on the system property were investigated,compared with the traditional diluent 1,4-butanediol diglycidyl ether（ BDDGE）. The performance was tested through the thermogravimetric analysis（ TGA） and electronic universal testing machine. It is found that the viscosity of the AHBP / TMP system is 2800 cp when the content of AHBP is 15%,and the tensile strength,bending strength,and impact strength are increased by 12%,13. 2%,40%,respectively. The temperature is313. 9 ℃ as the thermal mass loss is 5%. However,the mechanical property and thermal property of BDDGE / TMP /MNA system degrade obviously. The results show that as the diluent of TMP,AHBP not only reduces the viscosity but also displays better toughen effect than BDDGE,with no obvious degradation of thermal property.