Zhu Menglu, Cao Zhanshuo, Zhou Haijun, Xie Yijun, Li Guohua, Wang Nongyue, Liu Yingchun, He Lianqi, Qu Xiongwei
Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology Tianjin 300130 P. R. China
Institute of Energy Resources, Hebei Academy of Sciences Shijiazhuang 050081 P. R. China.
RSC Adv. 2020 Mar 10;10(17):10277-10284. doi: 10.1039/c9ra10514j. eCollection 2020 Mar 6.
Polyacrylic pressure-sensitive adhesives (PSAs) based on butyl acrylate (BA), 2-hydroxyethyl acrylate (HEA), and acrylic acid (AA) were prepared by a bulk polymerization process triggered by a radical photoinitiator under UV irradiation and UV-crosslinking. 1,6-Hexanediol diacrylate (HDDA) with difunctional groups was introduced into the PSAs to modify semi-interpenetrating network structures. The effect of HDDA content on the pressure-sensitive performance was comprehensively tested. The viscosity of the prepolymer was measured by a rotational viscometer. Prepolymers obtained by a photoinduced process and UV crosslinking process were confirmed Fourier transform infrared spectroscopy (FTIR). All double bonds participated in the copolymerization without any remaining monomers, which reflected the concept of green environmental protection. Gel content in the crosslinked portion was examined by Soxhlet extraction, whilst the soluble molecular weight of PSAs was characterized by gel permeation chromatography (GPC). The viscoelastic properties of polymer films were determined by dynamic mechanical analysis (DMA). The value and storage modulus (') of the PSAs were enhanced with the addition of HDDA. Moreover, three fundamental adhesive properties, loop tack force, peel force and shear strength of PSAs, were measured. The results showed that UV crosslinking technology achieved a good balance of the three forces with excellent pressure-sensitive properties.
基于丙烯酸丁酯（BA）、丙烯酸-2-羟乙酯（HEA）和丙烯酸（AA）的聚丙烯酸类压敏胶（PSA）通过自由基光引发剂在紫外线照射和紫外线交联下引发的本体聚合工艺制备。将具有双官能团的1,6-己二醇二丙烯酸酯（HDDA）引入PSA中以改性半互穿网络结构。全面测试了HDDA含量对压敏性能的影响。通过旋转粘度计测量预聚物的粘度。通过傅里叶变换红外光谱（FTIR）确认了通过光诱导过程和紫外线交联过程获得的预聚物。所有双键都参与了共聚反应，没有任何残留单体，这体现了绿色环保的理念。通过索氏提取法检测交联部分的凝胶含量，同时通过凝胶渗透色谱（GPC）表征PSA的可溶分子量。通过动态力学分析（DMA）测定聚合物薄膜的粘弹性性能。随着HDDA的加入，PSA的损耗因子（tanδ）值和储能模量（G'）提高。此外，还测量了PSA的三项基本粘合性能，即环形粘性力、剥离力和剪切强度。结果表明，紫外线交联技术实现了这三种力的良好平衡，具有优异的压敏性能。
