液体再生橡胶作为反应型高分子增塑剂的应用研究

Application of Liquid Reclaimed Rubber as Reactive Polymer Plasticizer

采用同向双螺杆挤出机制备液体再生橡胶(LRR),并将其作为反应型高分子增塑剂用于天然橡胶(NR)胶料,研究其应用效果。结果表明:LRR的溶胶含量高,粘度小,其具有可再交联的特性;LRR具有一定的增塑作用,与NR相容性好,混炼胶的丙酮抽出物含量小,其难喷霜;与环保芳烃油相比,LRR在NR胶料硫化过程中参与交联反应,采用LRR的硫化胶具有更大的硬度、定伸应力和拉伸强度,表明LRR起到了反应型高分子增塑剂的作用。

Liquid reclaimed rubber(LRR)was prepared by co-rotating twin screw extruder,and used as reactive polymer plasticizer in natural rubber(NR)compounds to study its application effect.The results showed that the LRR had relatively high sol content,small viscosity and re-vulcanized ability.The LRR had certain plasticizing effect and good compatibility with NR.The content of acetone extract of the compound was low and there was basically no blooming problem.Compared with the vulcanizate environment-friendly aromatic oil,the vulcanizates with LRR had higher hardness,modulus and tensile strength because LRR participated in the crosslinking reaction in the vulcanization process,indicating that LRR played the role of reactive polymer plasticizer.