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Investigating the electrical percolation threshold of ternary composite films with different compatibility between polymer blends
Journal of Polymer Engineering ( IF 1.7 ) Pub Date : 2021-07-01 , DOI: 10.1515/polyeng-2021-0018
Huagen Xu 1, 2 , Muchao Qu 3 , Qiancheng Yang 1 , Dirk W. Schubert 2
Affiliation  

Electrical conductive of polystyrene (PS)/poly(butyl methacrylate) (PBMA)/carbon black (CB) and PS/poly (cyclohexyl methacrylate) (PChMA)/CB ternary composite films with different polymer blend ratios are prepared through solution casting. The percolation thresholds ( ϕ c ) of all the composite films before and after thermal annealing have been determined through the McLachlan GEM equation. Moreover, the PS/poly (methyl methacrylate) (PMMA)/CB and PS/poly (ethyl methacrylate) (PEMA)/CB films obtained from the same method while only considering conductivity after thermal annealing as well in this work for comparison. Though the CB particles are revealed to be located at only one polymer phase of all four different polymer blends, with compatibility between polymer blends increasing, the ternary composite films show different ϕ c behaviors by changing polymer blend ratios. In PS/PChMA/CB case, the phase separation between PChMA and PS cannot be observed under scanning electron microscope (SEM). After thermal annealing, all the ϕ c of PS/PChMA/CB films with different PS/PChMA ratios almost show a linear behavior instead of the double percolation behavior with PChMA content increasing. Suppose both ϕ c of binary systems (polymer A/filler and polymer B/filler) is determined. In that case, a linear behavior relationship between the ϕ c of the ternary composites (A + B + fillers) with the ratio of two polymers can be revealed when polymer A and B are miscible.

中文翻译:

研究聚合物共混物之间具有不同相容性的三元复合薄膜的电渗透阈值

通过溶液浇铸制备了具有不同聚合物共混比的聚苯乙烯(PS)/聚甲基丙烯酸丁酯(PBMA)/炭黑(CB)和PS/聚甲基丙烯酸环己酯(PChMA)/CB三元复合薄膜的导电性。所有复合膜在热退火前后的渗透阈值 ( ϕ c ) 已通过 McLachlan GEM 方程确定。此外,PS/聚(甲基丙烯酸甲酯)(PMMA)/CB和PS/聚(甲基丙烯酸乙酯)(PEMA)/CB薄膜由相同方法获得,同时仅考虑热退火后的电导率在本工作中进行比较。尽管显示 CB 颗粒仅位于所有四种不同聚合物共混物的一个聚合物相中,但随着聚合物共混物之间的相容性增加,三元复合薄膜通过改变聚合物混合比例显示出不同的 ϕ c 行为。在 PS/PChMA/CB 情况下,在扫描电子显微镜 (SEM) 下无法观察到 PChMA 和 PS 之间的相分离。热退火后,随着 PChMA 含量的增加,不同 PS/PChMA 比例的 PS/PChMA/CB 薄膜的所有 ϕ c 几乎表现出线性行为,而不是双渗透行为。假设确定了二元系统(聚合物 A/填料和聚合物 B/填料)的 ϕ c 。在这种情况下,当聚合物 A 和 B 混溶时,可以揭示三元复合材料(A + B + 填料)的 ϕ c 与两种聚合物的比例之间的线性行为关系。随着 PChMA 含量的增加,所有具有不同 PS/PChMA 比率的 PS/PChMA/CB 薄膜的 ϕ c 几乎表现出线性行为,而不是双渗透行为。假设确定了二元体系(聚合物 A/填料和聚合物 B/填料)的 ϕ c 。在这种情况下,当聚合物 A 和 B 混溶时,可以揭示三元复合材料(A + B + 填料)的 ϕ c 与两种聚合物的比例之间的线性行为关系。随着 PChMA 含量的增加,所有具有不同 PS/PChMA 比率的 PS/PChMA/CB 薄膜的 ϕ c 几乎表现出线性行为,而不是双渗透行为。假设确定了二元体系(聚合物 A/填料和聚合物 B/填料)的 ϕ c 。在这种情况下,当聚合物 A 和 B 混溶时,可以揭示三元复合材料(A + B + 填料)的 ϕ c 与两种聚合物的比例之间的线性行为关系。
更新日期:2021-07-04
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