【摘要】 采用乳液共沉法和直接混炼法制备NBR/PVC/有机蒙脱土(OMMT)纳米复合材料,研究纳米复合材料的硫化特性、微观结构、动态力学性能和热稳定性。结果表明,OMMT能够显著促进NBR的硫化反应,使NBR/PVC/OMMT纳米复合材料的焦烧时间和正硫化时间明显缩短;乳液共沉法和直接混炼法NBR/PVC/OMMT纳米复合材料是插层型纳米复合材料,乳液共沉法NBR/PVC/OMMT纳米复合材料中的OMMT分散更为均匀,其储能模量、玻璃化温度和热分解温度均高于NBR/PVC共混物和直接混炼法NBR/PVC/OMMT纳米复合材料,具有较好的动态力学性能和热稳定性。更多还原

【Abstract】 The NBR/PVC/organomontmorillonite（OMMT） nanocomposites were prepared by（emulsion） co-precipitation technique and direct mixing technique respectively.The curing characteristics,microstructure,dynamic properties and thermal stability of the obtained nanocomposites were investigated.The results showed that t_s and t₉₀ of NBR/PVC/OMMT nanocomposites reduced significantly as OMMT could accelerate the curing rate of NBR remarkably;the NBR/PVC/OMMT nanocomposites prepared by both emulsion co-precipitation technique and direct mixing technique were（intercalation） type nanocomposites;and the NBR/PVC/OMMT nanocomposites prepared by emulsion co-precipitation technique featured more uniform dispersion of OMMT and higher storage modulus,T_g and pyrolytic temperature as well as better dynamic properties and thermal stability when compared to that prepared by direct mixing technique.更多还原