导电聚吡咯是在电化学聚合过程中聚吡咯部分转移电子给电极,然后嵌入对离子的产物.现有的实验事实证明,在导电聚吡咯的厚度方向对阴离子的浓度分布非常均匀,这些实验结果是从横截面的电子探针法取得,但对100 A 以内表面层中对阴离子浓...导电聚吡咯是在电化学聚合过程中聚吡咯部分转移电子给电极,然后嵌入对离子的产物.现有的实验事实证明,在导电聚吡咯的厚度方向对阴离子的浓度分布非常均匀,这些实验结果是从横截面的电子探针法取得,但对100 A 以内表面层中对阴离子浓度的分布是否均匀是不清楚的.本工作试图用X射线光电子能谱的电子起飞角依赖性来得到在几十 A 表面层内的对阴离子浓度分布.展开更多
Atactic polystyrene ( a PS) films cast from solutions of different concentrations in dichloromethane under vacuum conditions were prepared.Their tensile mechanical behavior has been studied.It was found that the tensi...Atactic polystyrene ( a PS) films cast from solutions of different concentrations in dichloromethane under vacuum conditions were prepared.Their tensile mechanical behavior has been studied.It was found that the tensile strength of films cast in vacuum increases significantly with the solution concentration when the solution concentration is above 0.02?g/mL.The existence of a critical concentration value in the region of 0 01~0 02?g/mL is in agreement with the results of previous experiments.The critical concentration has been identified as c e for coil entanglement.展开更多
文摘导电聚吡咯是在电化学聚合过程中聚吡咯部分转移电子给电极,然后嵌入对离子的产物.现有的实验事实证明,在导电聚吡咯的厚度方向对阴离子的浓度分布非常均匀,这些实验结果是从横截面的电子探针法取得,但对100 A 以内表面层中对阴离子浓度的分布是否均匀是不清楚的.本工作试图用X射线光电子能谱的电子起飞角依赖性来得到在几十 A 表面层内的对阴离子浓度分布.
文摘Atactic polystyrene ( a PS) films cast from solutions of different concentrations in dichloromethane under vacuum conditions were prepared.Their tensile mechanical behavior has been studied.It was found that the tensile strength of films cast in vacuum increases significantly with the solution concentration when the solution concentration is above 0.02?g/mL.The existence of a critical concentration value in the region of 0 01~0 02?g/mL is in agreement with the results of previous experiments.The critical concentration has been identified as c e for coil entanglement.