Late Stage Domain Coarsening Dynamics of Lamellar Block Copolymers
Late Stage Domain Coarsening Dynamics of Lamellar Block Copolymers
复制标题
层状嵌段共聚物的后期域粗化动力学
DOI：
10.1021/acsmacrolett.1c00105
复制
发表时间：
2021
影响因子：
7.015
通讯作者：
Karim, Alamgir
中科院分区：
文献类型：
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作者：
Singh, Maninderjeet;Wu, Wenjie;Nuka, Vinay;Strzalka, Joseph;Douglas, Jack F.;Karim, Alamgir
嵌段共聚物（BCP）的相分离动力学可以预期显着不同的聚合物共混物，由于链连接的约束。 BCP相分离动力学已被理论研究，但很少有实验证据来证实理论上提出的BCP畴生长标度律。在这里，我们研究了后期片层嵌段共聚物畴粗化的动力学，发现无论退火温度如何，片层畴生长的标度指数均为约1/6（0.17），该值接近理论研究预测的标度指数0.2。此外，我们发现，在畴粗化方程的前因子显示Arrhenius依赖于温度，表明BCP畴生长动力学是Arrhenius在温度范围内的调查。
Block copolymer (BCP) phase separation dynamics can be expected to differ significantly from that of the polymer blends due to the constraint of chain connectivity. BCP phase separation dynamics has been studied theoretically, but there has been little experimental evidence to confirm the BCP domain growth scaling laws put forward theoretically. Here, we investigate the dynamics of late-stage lamellar BCP domain coarsening and find that the scaling exponent for lamellar domain growth is ≈1/6 (0.17), irrespective of the annealing temperature, a value close to the scaling exponent of 0.2 predicted by theoretical studies. Furthermore, we show that the prefactors in the domain coarsening equation show Arrhenius dependence on temperature, indicating that the BCP domain growth dynamics is Arrhenius over the temperature range investigated.