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以丙烯亚胺类外交联剂(SAC-100)作为羧酸型丙烯酸酯PSA(压敏胶)乳液的改性剂,探讨了SAC-100掺量对PSA性能的影响,并采用DMA(动态力学分析)仪对固化前后乳胶膜的性能进行了表征。研究结果表明:引入SAC-100后,PSA的凝胶含量显著提高,凝胶部分的M_c(交联点之间平均相对分子质量)、溶胶的M_w(重均相对分子质量)或M_n(数均相对分子质量)不断减小;固化后乳胶膜的G′(储能模量)随SAC-100掺量增加而增大,相应PSA的内聚强度、持粘力提高;乳胶膜的tanδ(力学损耗因子)随SAC-100掺量增加而减小,相应PSA的初粘力和剥离强度降低。
The effect of SAC-100 content on the properties of PSA was investigated by using SAC-100 as a modifier for carboxylic acid-based acrylic PSA (pressure-sensitive adhesive) emulsion. Analysis) The performance of the latex film before and after curing was characterized. The results showed that the gel content of PSA increased remarkably with the introduction of SAC-100, the M_c (average relative molecular weight between crosslinking points), M_w (weight average molecular weight) or M_n Relative molecular mass) decreased continuously; the G ’(storage modulus) of the cured latex film increased with the increase of the content of SAC-100, and the cohesive strength and cohesion of the corresponding PSA increased; the tanδ Loss factor) decreases with the increase of SAC-100 content, and the initial tack and peel strength of the corresponding PSA decrease.