硼酸酯偶联剂的合成与应用研究

以硼酸、异丙醇和十八醇为主要原料,催化剂是采用DNW-1强酸性离子交换树脂,在氮气保护下合成了硼酸酯偶联剂。考察了带水剂及物料摩尔比对酯化率的影响,并用红外光谱和1H NMR对硼酸酯进行了表征。研究发现:在n(硼酸)∶n(十八醇)∶n(异丙醇)=0.9∶2.0∶1.2的条件下,并采用苯和甲苯混合带水剂时,酯化率可达到94.57%。利用所合成的硼酸酯偶联剂应用于水镁石/HDPE复合体系中,结果表明:改性水镁石/HDPE体系的拉伸强度高于未改性水镁石/HDPE体系的拉伸强度。添加量为50%时,改性水镁石的拉伸性能比未改性前提高了3.1%,LOI值为24.5。

Synthesis and Application of Borate Ester Coupling Agent

Using boric acid, isopropanol and octadecanol as main raw materials, strong acid ion exchange resin DNW-1 as catalyst, the borate ester coupling agent was prepared in N2 atmosphere condition. The influence of water carrying agent and mole ratio of raw materials on esterification rate was studied, and the borate ester coupling agent was characterized by IR and1H NMR. The results show that the best reaction conditions of the esterification reaction are as follows： the best water carrying agent is the mixture of benzol and toluene,n（boric acid）：n（octadecanol）：n（isopropanol）= 0.9： 2.0： 1.2; under above conditions, the esterification rate can reach to 94.57%.And the borate ester coupling agent prepared was used in the composite of brucite/HDPE. The result shows that the tensile strength of modified brucite/HDPE is better than the unmodified brucite/HDPE; when dosage of the borate ester coupling agent is 50%, the tensile strength of modified brucite/HDPE can increase by about 3.1%, and the value of LOI is 24.5.