水利水电技术（中英文）

在水工建筑领域，常会预留出伸缩缝以应对水泥混凝土的热胀冷缩。缝内的止水材料不仅需要具备良好的气密性和黏性，同时也需要有较高的塑性。因丁基橡胶分子链的侧基团中甲基的排列十分紧密，限制了大分子和链段的运动，因此其具备很低的透气率和优异的气密性，常被用作为止水材料。但丁基橡胶本身的自黏性和互黏性差，需借助增黏剂进行补强，而溴化后的丁基橡胶的黏性虽然得到了提高，但其性能仍不能满足使用要求。因此，采用溴化丁基橡胶为基材，优选补强材料、增黏剂、增塑剂，并以增黏剂为变量，研究不同种类和掺量的增黏剂与溴化丁基橡胶混炼后的性能，并探索其自硫化的可能性。研究结果表明，当选用松香体系，炭黑为50份，环烷油为50份，且松香份数为70份时，其剥离强度可达41.77 N/25 mm,即增黏效果较好。

In the field of hydraulic construction, expansion joints are often provided to deal with the thermal expansion and cold contraction of concrete. The water-stop material in the joint not only needs to have good air tightness and adhesion but also needs to have high plasticity. The arrangement of methyl groups in the side groups of the molecular chain of butyl rubber is very close, limiting the movement of macromolecules and chain segments, so it has a very low air permeability and excellent airtightness and is often used as a water-stop material. However, butyl rubber itself has poor self-adhesion and mutual adhesion and needs to be reinforced with the help of adhesion promoters. Although the viscosity of brominated butyl rubber has been improved, its properties still cannot meet the requirements of use. Therefore, brominated butyl rubber with better viscosity was used as the substrate, reinforcing materials, tackifiers and plasticizers were preferably selected, and tackifiers were used as the variable evaluation indexes to study the properties of different kinds of tackifiers and brominated butyl rubber blended with different dosages, and to explore the possibility of its self-vulcanization. The result showed that when the rosin system was selected, carbon black was 50 phr, naphthenic oil was 50 phr, and the rosin portion was 70 phr, the peel strength was up to 41.77 N/25 mm, which means that the tackifying effect was better.