对苯二腈氧化物的合成及其对聚丁二烯室温固化性能的研究

Study on Synthesis of Terephthalonnitrile Oxide and Its Application as Curing Agent at Room Temperature in Polybutadiene

摘要:

以聚丁二烯液体橡胶（LPB）作为粘合剂，加入合成的1，4-对苯二氯代醛肟及三乙胺后进行1,3-偶极环加成反应，实现对聚丁二烯的室温(25℃)固化，以寻找最佳的固化比例。使用FTIR、核磁、质谱、对化合物进行结构表征；用FTIR对弹性体进行结构研究；拉伸强度和断裂伸长率、邵氏硬度对弹性体进行力学性能研究；TG、DSC、接触角和FSEM对弹性体表面性能进行研究。结果表明：合成的氯代-对苯二甲醛肟产率为94%，加入三乙胺后在室温下能实现对聚丁二烯的固化；固化剂含量为10%时，制备的弹性体的拉伸强度为0.35MPa，断裂伸长率为53%，模量为0.66KPa力学性能优异；固化剂含量10%弹性体的接触角为112.76?，达到最大值，弹性体疏水性能最好。室温固化弥补了传统固化技术中的不足，大大提高了弹性体的耐热性和力学性能。

Abstract:

The ploybutadiene elastomer was prepared under room temperature (25℃) from liquid polybutadiene rubber (LPB) which was adhesive, benzene-1,4-dicarbohy-droximoyl dichloride which was synthesized and trimethylamine via 1,3-dipolar cycloaddition，to seek the best curing ratio. The structure of benzene-1,4-dicarbohy-droximoyl dichloride was con?rmed by FTIR,1H NMR, MS and melting point. The structure of the polybutadiene elastomer was characterized by FTIRT. The mechanical property of the elastomer was determined by tensile strength, elongation at break and shore hardness. The surface property of the elastomer was con?rmed by contact angle and FSEM. The results indicates that the yield of benzene-1,4-dicarbohy-droximoyl dichloride is 94%. LPB was cured under room temperature after adding trimethylamine. When the mass ratio of the curing agent to LPB was 10%, the mechanical property of the elastomer was best. The tensile strength of the elastomer reaches 0.35MPa, with 53% elongation at break and 0.66KPa modulus. And the contact angle reaches 112.76皐hich shows excellent hydrophobic performance. Room temperature curing made up for the deficiency of traditional curing technology, greatly improving the heat resistance and mechanical properties of the elastomer.