环保型水切割胶粉对天然橡胶力学性能和动态性能的影响

采用环保型水切割胶粉及力化学改性胶粉（MRP）与天然橡胶（NR）复合制备胶粉-NR复合胶，并探讨了胶粉用量对复合胶力学性能和动态性能的影响。通过红外和热失重分析确定了胶粉的主要成分为NR和丁苯橡胶（SBR），且改性后胶粉大分子链结构未发生明显变化。通过橡胶加工分析仪研究了胶粉用量及改性对复合胶加工性能的影响。采用炭黑分散仪研究并观察了胶粉在NR中的分散情况。结果表明，胶粉改性后与NR的相容性提高，二者界面结合力增大，MRP-NR复合胶加工性能改善。炭黑分散结果表明，胶粉用量越多，其分散性越差，改性后胶粉的分散性提高，MRP-NR复合胶的力学性能最优，拉伸强度为27.9 MPa。

Effect of environmental and water cutting rubber powder on the mechanical and dynamic mechanical properties of rubber powder-natural rubber

Environmental and water cutting rubber powder (RP)-natural rubber (NR) composites and surfaces modification rubber powder (MRP)-NR composites were prepared. Effects of the content of RP and water cutting rubber powder(WRP) on the mechanical and dynamic mechanical properties of the composites were investigated. The infrared and thermogravimetric analysis show that the main rubber of the RP is NR and styrene-butadiene rubber (SBR).The structure of the main chain has no obvious change by modification, which was confirmed by thermogravimetric analysis. The processing property of MRP-NR composites was characterized by rubber process analyzer and the dispersion of rubber powder was characterized by a carbon black dispersing instrument. The results show that the compatibility of the MRP and NR has been improved and the processing property of MRP-NR composites is better than RP-NR composites. The dispersion of RP in NR gets worse with the increase content of RP, compared with the RP, MRP gets more separation and distribution in NR matrix, the tensile strength of MRP-NR composites is 27.9 MPa.