烯丙基化碳纳米管改善丙烯酸酯压敏胶的性能

本文利用γ-甲基丙烯酰氧基丙基三甲氧基硅烷(KH570)对多壁碳纳米管(MWNTs)进行修饰使其表面接枝上烯丙基官能团,与丙烯酸酯类单体进行原位聚合,制备了一种耐高温丙烯酸酯压敏胶(PSA)。 通过傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)和扫描电子显微镜(SEM)表征了MWNTs和丙烯酸酯PSA的结构与性能,探讨了改性MWNTs的质量分数对PSA耐热性能和粘接性能的影响。 结果表明,与未改性的丙烯酸酯PSA相比,当改性MWNTs的质量分数为1.5%时,改性丙烯酸酯PSA的耐热性能和粘接性能最佳,热分解温度从360 ℃提高到了382 ℃,耐热温度从80 ℃提高到了155 ℃,初粘力、持粘力和180°剥离强度分别从2 h和13.66 N/(25 mm)(12号小球)提高到了27 h和17.34 N/(25 mm)(17号小球)。

Properties of Acrylate Pressure Sensitive Adhesive

A silane coupling agent 3-methacryloxypropyltrimethoxysilane (KH570) was used to modify multi-walled carbon nanotubes (MWNTs) to graft allyl functional groups on the surface, and in situ polymerization with acrylate monomers was performed to prepare a high temperature-resistant acrylate pressure sensitive adhesive (PSA). The structure and properties of MWNTs and PSA were characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The effects of the mass fraction of modified MWNTs on PSA′s heat resistance and adhesive properties were studied. The results show that when the mass fraction of the modified MWNTs is 1.5%, the heat resistance and adhesive properties of the modified PSA are the best. The thermal decomposition temperature increases from 360 to 382 ℃, the heat resistant temperature increases from 80 to 155 ℃, and the initial adhesion, the holding power and the 180° peel increase from ball No.12, 2 h and 13.66 N/25 mm to ball No.17, 27 h and 17.34 N/25 mm, respectively.