不同固化剂对筘胶粘剂性能的影响

Effect of Different Curing Agents on the Performance of the Reed Adhesive

为了提高筘胶粘剂的性能和质量,通过调整固化剂中活泼氢和环氧树脂中环氧基的摩尔比,对比固化后胶粘剂的拉伸剪切强度、冲击强度、胶化时间和硬度,探讨固化剂结构和用量对筘胶粘剂性能的影响。结果表明:随着固化剂中活泼氢与环氧树脂中环氧基摩尔比增大,胶粘剂拉伸剪切强度和冲击强度先增长后降低,胶化时间逐步缩短;使用固化剂T-31的胶粘剂粘接强度最高,使用固化剂D-400和1618的胶粘剂韧性及粘接强度较好,使用固化剂5773的胶粘剂固化反应速度快、韧性较差,而使用固化剂651的胶粘剂韧性适中,拉伸剪切强度较低,固化反应时间较长;固化剂含量和结构对固化环氧树脂体系的硬度影响不大,邵尔D硬度均约为80度。

To improve the performance and quality of reed adhesive,through adjustment of the molar ratio of active hydrogen in the curing agent and epoxy group in epoxy resin,and analysis of the tensile shear strength,impact strength,gelling time and hardness of the cured adhesive,probing is done into the effect of the structure and dosage of the curing agent on the performance of the reed adhesive.The results show that with the increase of the ratio of active hydrogen in the curing agent and epoxy group in epoxy resin,the tensile shear strength and the impact strength of the adhesive decreases before increases,and more,gelling are increased first and the gelling time shortens gradually,and the adhesive strength of the adhesive with the curing agent T-31 is the highest,the adhesive strength and bonding strength of the adhesive with the curing agent D-400 and 1618 are preferably accepted.The curing agent 5773 has fast curing rate but poor toughness,while the toughness of the adhesive with the curing agent 651 is moderate,lower in the tensile shear strength and longer in the curing time.The content and structure of curing agent have little effect on the hardness of cured epoxy resin system,and the hardness of Shore D is about 80 degrees.