光引发聚合法制备光致失黏胶

发布时间：2018-04-19 22:09

本文选题：光引发聚合 + 失黏胶　；参考：《化工进展》2017年06期

【摘要】：利用光引发聚合法取代传统热聚合合成一种能够制备光致失黏胶的聚丙烯酸酯类共聚物,称为基胶。将基胶与适量的光引发剂及多光敏官能团低聚物复配,得到目标产物。在UV光照前,展现了很好的粘接性能,180°剥离强度可以达到24N/25mm;在20m W/cm~2的365nm波长UV光照下照射20s后,光敏树脂反应产生交联,与直链分子形成互穿网络结构,导致180°剥离强度降至几乎为零,从而展示了很好的失黏性能,便于拆离,而不损坏元器件。进一步探究了基胶成分、多光敏官能团低聚物的种类、用量等多个参数对光致失黏胶综合性能的影响。最后通过扫描电镜,对其失黏机理进行讨论,有两个关键因素导致光照后胶黏剂失黏:低聚物交联过程,引起体积的收缩,与基材粘接面积减小;互穿网络结构造成基胶失去橡胶弹性,表现塑料特性。
[Abstract]:A kind of polyacrylate copolymers which can produce photo-induced viscosity loss was synthesized by photo-initiated polymerization instead of traditional thermal polymerization. The target product was obtained by blending the base adhesive with a proper amount of photoinitiator and multi- functional group oligomer. Before UV irradiation, the adhesive strength of 180 掳can reach 24N / 25mm. After 20m W/cm~2 UV irradiation at 365nm wavelength for 20 s, the reaction of Guang Min resin produces crosslinking and forms an interpenetrating network structure with the straight chain molecule. As a result, the peel strength of 180 掳is reduced to almost zero, which shows a good loss of viscosity and is easy to detach without damaging the components. The effects of the composition of base adhesive, the type and amount of oligomer of multi- functional group on the comprehensive properties of photo-induced loss of viscose were further investigated. Finally, the mechanism of viscosity loss is discussed by SEM. There are two key factors leading to the loss of adhesion of adhesive after irradiation: the crosslinking process of oligomer causes volume shrinkage and the area of adhesion to substrate decreases; Interpenetrating network structure results in loss of rubber elasticity and performance of plastic properties.
【作者单位】：河北工业大学化工学院;
【分类号】：TQ433.4

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