摘要
基于本体聚合的反应机理,选用丙烯酸丁酯、丙烯酸异辛酯等丙烯酸酯类单体,以偶氮二异丁酸二甲酯作为引发体系,成功合成了一系列具备有机硅改性丙烯酸酯且可UV固化的压敏胶。在合成过程中,利用本体聚合产物纯净等优势,实现了对聚合物结构的精准构建。借助拉伸试验机、核磁氢谱、凝胶渗透色谱等先进测试手段,深入探究了不同丙烯酸酯单体种类及有机硅的引入对压敏胶性能的影响。研究发现,随着有机硅结构被成功引入到压敏胶体系中,压敏胶性能产生显著变化。在PET基材上,其剥离力达到6.87 N/25 mm,初粘力达到9.45N/25 mm;在BOPP基材上,剥离力为3.92 N/25 mm,初粘力为6.35 N/25 mm;同时,压敏胶的抗水性能也得到显著提升。以上表明,有机硅结构凭借其独特的化学特性,有效降低了压敏胶材料的表面能,从而提升其抗水能力,也使得该压敏胶能够适配一些低表面能的应用场景,拓展了压敏胶在特殊领域的应用范围。
Using azo-bis(isobutyronitrile)as an initiator system,based on the reaction mechanism of bulk polymerization,a series of acrylic pressure-sensitive adhesives(PSAs)with organosilicon modifications and UV-curing capability were successfully synthesized by selecting acrylic monomers such as butyl acrylate and isooctyl acrylate.During the synthesis process,the pure nature of the bulk polymerization products was utilized to precisely construct the polymer structure.Through advanced testing methods such as tensile testing,nuclear magnetic resonance(NMR)spectroscopy,and gel permeation chromatography(GPC),the influence of different types of acrylate monomers and the introduction of organosilicon on the properties of the PSA was thoroughly investigated.The study found that as the organosilicon structure was successfully incorporated into the PSA system,the adhesive properties exhibited significant changes.On PET substrates,the peel strength reached 6.87 N/25 mm and the initial tack was 9.45 N/25 mm;on BOPP substrates,the peel strength was 3.92 N/25 mm and the initial tack was 6.35 N/25 mm.At the same time,the water resistance of the PSA was significantly improved.This clearly indicates that the organosilicon structure,with its unique chemical properties,effectively reduced the surface energy of the PSA material,enhancing its water resistance and making the PSA adaptable to low-surface-energy applications,thereby expanding its range of applications in specialized fields.
作者
王彬汁
刘晖
谢子城
黄月文
王斌
林树东
WANG Binzhi;LIU Hui;XIE Zicheng;HUANG Yuewen;WANG Bin;LIN Shudong(Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650,China;University of Chinese Academy of Sciences,Beijing 101408,China;CAS Engineering Laboratory for Special Fine Chemicals,Guangzhou 510650,China;CASH GCC Shaoguan Research Institute of Advanced Materials,Shaoguan 512400,China;CASH GCC Fine Chemicals Incubator(Nanxiong)Co.Ltd,Nanxiong 512400,China)
出处
《广州化学》
2025年第6期41-46,I0002,共7页
Guangzhou Chemistry
关键词
丙烯酸酯压敏胶
本体聚合
有机硅改性
UV固化
acrylic pressure-sensitive adhesive
bulk polymerization
silicone modification
UV curing
