摘要
采用液相化学沉积法和凝聚共沉法制备稀土镝掺杂炭黑填充型粉末NR[P（NR／HAF-Dy）]，研究其毛细管挤出流变行为和复杂口型挤出特性，并与传统的炭黑填充型粉末NR[P（NR／HAF）]和NR／炭黑干法混炼胶（NR／HAF）进行比较。结果表明，在温度为90～150℃及剪切速率为20～1500s。的范围内，3种混炼胶的表观剪切粘度由小到大的顺序为P（NR／HAFDy），P（NR／HAF），NR／HAF；当Dy／HAF用量比为4／100时，P（NR／HAFDy）混炼胶具有较低的表观剪切粘度和稳定的非牛顿流体特性；与NR／HAF相比，P（NR／HAF）混炼胶具有较好的复杂口型挤出加工性能，P（NR／HAF-Dy）混炼胶的挤出性能则更为优良。
Dysprosium-modified carbon black filled powdered NR[P（NR/HAF-Dy）] was prepared by liquid-phase chemical deposition and coacervation-coprecipitation,and its capillary extrusion theo-logical properties and Garvey die extrudability were investigated, compared with traditional carbon black filled powdered NREP （NR/HAF）] and NR/carbon black blends （NR/HAF） prepared through dry mixing. The results showed that in wide range of temperatures（90-150℃） and shear rates（20-1 500 s^-1）,the order of the apparent shearing viscosity for 3 different mixes was as follows： P（NR/ HAF-Dy）〈P（NR/HAF）〈NR/HAF. P（NR/HAF-Dy） possesses very low apparent shearing viscosity and stable non-Newtonian fluid flowing properties. The order of the Garvey die extrudability for 3 different mixes was as follows;P（NR/HAF-Dy）〉P（NR/HAF）〉NR/HAF.
出处
《橡胶工业》
CAS
北大核心
2008年第5期261-267,共7页
China Rubber Industry
基金
国家自然科学基金资助项目(59773010)
广东省自然科学基金资助项目(031366
0400016)
