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首页> 外文期刊>Journal of Applied Polymer Science >Tack properties and adhesion mechanism of two different crosslinked polyacrylic pressure-sensitive adhesives
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Tack properties and adhesion mechanism of two different crosslinked polyacrylic pressure-sensitive adhesives

机译：两种不同交联的多丙烯酸压敏粘合剂的粘性性能和粘附机理

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摘要

Tack properties of cross-linked random poly(n-butyl acrylate-acrylic acid) (A) and poly(2-ethylhexyl acrylate-acrylic acid) (B) copolymers as pressure-sensitive adhesives (PSAs) were compared by a probe tack test to know the optimal application in the industrial field. Tack increased remarkably with temperature, reached a peak, then decreased. The peak of tack appeared at higher temperature for B. Tack increased with increasing contact time and decreasing crosslinking agent level. The fracture energy at higher temperature was higher for B than A. From the observation of debonding behavior, the fibrillation occurred at the edge of probe. The wettability and deformability of PSA were larger for B than A. From a dynamic mechanical analysis, the shear storage modulus (G') in the rubbery plateau region was lower for B than for A. The good wettability and deformability were improved as a result of its lower G'. The relaxation behaviors of PSAs and vulcanized isoprene rubber were measured by H-1 pulsed nuclear magnetic resonance. This technique is found to be useful for estimating the degree of intermolecular interactions. The crosslinking degree hardly influenced. The intermolecular interaction was weaker for B. This was the reason of the lower G' for B.
机译：通过探针粘结试验，比较了交联无规聚丙烯酸丁酯（A）和聚丙烯酸二乙基己酯（B）共聚物作为压敏粘合剂（PSA）的粘结性能，以了解其在工业领域的最佳应用。粘度随温度的升高而显著增加，达到峰值，然后下降。B的粘度峰值出现在较高的温度下。粘度随着接触时间的增加和交联剂用量的降低而增加。B在较高温度下的断裂能高于A。从脱粘行为观察，纤颤发生在探针边缘。PSA的润湿性和变形性B大于A。从动态力学分析来看，橡胶平台区域的剪切储能模量（G'）B低于A。良好的润湿性和变形性因其较低的G'而得到改善。用H-1脉冲核磁共振仪测定了PSA和硫化异戊二烯橡胶的弛豫行为。这项技术被发现有助于估计分子间相互作用的程度。交联度几乎不受影响。B的分子间相互作用较弱。这是B的G'较低的原因。

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