POSS改性水性双组份树脂的应用研究

Application of POSS modified waterborne two-component resin

以苯基三乙氧基硅烷(PTES)、苯基三甲氧基硅烷(PTMS)、四甲基二硅氧烷(D2H)为主要原料,在酸性条件下共水解缩聚得到部分含有Si—H键的PhH-POSS,并与烯丙基缩水甘油醚(AGE)进行硅氢化加成反应,制得环氧基POSS(EP-POSS),利用傅里叶红外光谱(FT-IR)、核磁共振氢谱(1H NMR)对其结构进行表征。并将POSS与水性环氧树脂、丙烯酸树脂复配进行改性,采用粒度分析仪、zeta电位分析仪对乳液粒径及电位进行测试,利用TGA及多功能试验机对漆膜热稳定性及力学性能进行测试。结果表明,POSS的加入,对乳液的粒径及zeta电位影响不大;当POSS的添加量为3%时,漆膜的力学性能较好,在热失重为5%及50%时,漆膜的热分解温度为289,329℃,拉伸强度为33.99MPa,断裂伸长率为51.6%。

Using phenyltriethoxysilane (PTES), phenyltrimethoxysilane (PTMS) and tetramethyldisiloxane (D2H) as the main raw materials, the Ph H -POSS with active Si-H bonds was synthesized by co-hydrolytic polycondensation under acidic conditions. Allylglycidylether (AGE) was introduced to the above system by hydrosilylation reaction to produce partially epoxy-based POSS (EP-POSS). The structure was characterized by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance ( 1H NMR). Then POSS was modified with waterborne epoxy resin and acrylic resin. Particle size analyzer and zeta potential analyzer were used to test the particle size and zeta potential of the emulsion. The thermal stability and mechanical properties of the painting were tested by TGA and multi-functional testing machine. The results showed that the introduction of POSS had little effect on the particle size and stability of the emulsion. When the amount of POSS added was 3%, the mechanical properties of the film were perfect. When the weight loss was 5% and 50%, the thermal decomposition temperature was 289 and 329 ℃, respectively. The tensile strength was 33.99 MPa and the elongation at break was 51.6%.