Abstract Phase behavior, rheology and adhesive properties of polyisobutylene-based blends containing up to 60 wt% of polyethylene wax were studied. Polyisobutylene and wax partially dissolve in each other at high temperatures, which strongly reduce the viscosity of the blends and facilitate their mixing. When cooled, the wax loses its solubility in the polymer matrix and crystallizes to form reinforcing particles. These particles increase the viscoelasticity of the blends, resulting in improved durability (up to 66-fold) and strength (up to 1.4-fold) of adhesive bonds. At the same time, the growth of viscoelasticity does not lead to a loss of tackiness of the blends, as the application of external force to form an adhesive bond destroys the percolation structure of wax particles. Because of the low specific surface area of wax particles, they increase the durability of adhesive joints worse than silica (in 380-fold) or organoclay particles (in 3300-fold). However, the use of polyethylene wax allows reducing melt viscosity by 4–5 decimal orders of magnitude in the case of highly filled adhesives.

中文翻译：

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聚乙烯蜡作为矿物填料的替代品，用于制备增强型压敏粘合剂

摘要 研究了含有高达 60 wt% 聚乙烯蜡的聚异丁烯基共混物的相行为、流变学和粘合性能。聚异丁烯和蜡在高温下会部分相互溶解，这会大大降低共混物的粘度并促进它们的混合。当冷却时，蜡失去其在聚合物基体中的溶解性并结晶形成增强颗粒。这些颗粒增加了共混物的粘弹性，从而提高了粘合剂的耐久性（高达 66 倍）和强度（高达 1.4 倍）。同时，粘弹性的增长不会导致共混物的粘性损失，因为施加外力形成粘合剂会破坏蜡颗粒的渗透结构。由于蜡颗粒的比表面积低，它们增加的粘合接头的耐久性比二氧化硅（380 倍）或有机粘土颗粒（3300 倍）差。然而，在高填充粘合剂的情况下，使用聚乙烯蜡可以将熔体粘度降低 4-5 个十进制数量级。