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以对苯二甲醛为原料,聚丁二烯(LPB)为基体,将合成的对苯二氯代醛肟和三乙胺反应,制备出高活性的固化剂对苯二腈氧化物,将其与LPB反应制备出室温固化的弹性体。探究了对苯二氯代醛肟的最佳用量,采用FTIR对弹性体进行了结构表征,利用TG、DSC、接触角和FSEM对弹性体表面性能进行了考察,对弹性体的拉伸强度、断裂伸长率和邵氏硬度进行了测试。结果表明:弹性体在8%~12%(对苯二氯代醛肟质量占LPB质量的百分数,下同)固化比例下,随着对苯二氯代醛肟用量的增加,弹性体的拉伸强度从0.21 MPa增加到0.45 MPa,断裂伸长率从83%减小到51%,模量从0.26 kPa增加到0.88 kPa,玻璃化转变温度(Tg)从-82.28℃降到-83.76℃。对苯二氯代醛肟用量为10%时,制备的弹性体的拉伸强度为0.35 MPa,断裂伸长率为53%,模量为0.66 kPa,邵氏硬度为34.6 Ha,T5%和T10%(弹性体失重5%和10%时所对应的温度)分别为234.85℃和330.46℃,弹性体与水的接触角达到112.11°。室温固化大大提高了弹性体的热稳定性和力学性能。
Using terephthalic acid as raw material and polybutadiene (LPB) as matrix, the synthesized p-phenylene dichloroaldehyde oxime and triethylamine were reacted to prepare the highly active curing agent terephthalatenitrile oxide, Reacts with LPB to prepare a room-temperature cured elastomer. The optimum dosage of p-phenylenedioaldehyde oxime was investigated. The structure of the elastomer was characterized by FTIR. The surface properties of the elastomer were investigated by TG, DSC, contact angle and FSEM. The tensile strength, Elongation at break and Shore hardness were tested. The results show that with the curing ratio of 8% ~ 12% (mass percentage of p-phthalaldehyde oxime to LPB mass), with the increase of the amount of p- The tensile strength increased from 0.21 MPa to 0.45 MPa, the elongation at break decreased from 83% to 51%, the modulus increased from 0.26 kPa to 0.88 kPa, and the glass transition temperature (Tg) decreased from -82.28 ° C to -83.76 ° C. Tensile strength of 0.35 MPa, elongation at break of 53%, modulus of 0.66 kPa, Shore hardness of 34.6 Ha, T5%, and T10 were obtained for 10% para-phenylenedioxyaldehyde % (Temperature corresponding to 5% and 10% of the weight of the elastomer) were 234.85 ° C and 330.46 ° C, respectively, and the contact angle of the elastomer with water reached 112.11 °. Room temperature curing greatly improves the thermal stability and mechanical properties of the elastomer.