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采用原位乳液聚合法将纳米SiO2、气相法SiO2、纳米TiO2、纳米CaCO3等无机纳米粒子引入到聚丙烯酸酯压敏胶乳液中,考察了纳米粒子类型对乳液聚合稳定性及复合乳液压敏性能的影响。结果表明,纳米SiO2和纳米TiO2的引入对乳液聚合的稳定性无实质上的影响,且能提高聚丙烯酸酯乳液压敏胶的综合性能,放置3个月后纳米SiO2复合乳液仍然有较好的稳定性和压敏性能;而气相法SiO2、纳米CaCO3在聚合时则有较高的凝胶率,且无论剥离力大小,均存在不同程度的脱胶或胶转移现象。
In situ emulsion polymerization was used to introduce inorganic nanoparticles such as nano-SiO2, fumed silica, nano-TiO2 and nano-CaCO3 into polyacrylate pressure-sensitive adhesive emulsion. The effects of nano-particles on the stability of emulsion polymerization and the pressure- Impact. The results showed that the introduction of nano-SiO2 and nano-TiO2 had no substantial effect on the stability of the emulsion polymerization and could improve the comprehensive performance of the polyacrylate emulsion PSA. After 3 months of storage, the nano-SiO2 composite emulsion still had better Stability and pressure-sensitive properties. However, the gas-phase SiO2 and nano-CaCO3 have higher gel fraction when polymerized, and no matter the degree of debonding, there are different degree of degumming or glue transfer phenomenon.