Understanding of PS-b-PMMA phase segregation under laser-induced millisecond thermal annealing

Understanding of PS-b-PMMA phase segregation under laser-induced millisecond thermal annealing
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了解激光诱导毫秒热退火下的 PS-b-PMMA 相偏析

DOI:
10.1117/12.2086057
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Thompson
Thompson
中科院分区:
--
文献类型:
--
作者:
Jacobs;Liedel;Thompson

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研究表明,PS-b-PMMA 的激光热退火可以在从玻璃化转变温度到远高于有序-无序转变温度的温度下,在几毫秒的时间内改变相分离。我们报告了通过微束掠入射小角 X 射线散射探测的圆柱体形成 PS-b-PMMA (53.8 kg/mol, fPS= 0.7) 的相分离动力学。结构演变被探测为峰值温度、温度时间和淬火速率的函数,在毫秒时间尺度和峰值淬火速率高达 107K/s 时很容易发生相分离。最终的薄膜形态取决于退火时间和环境温度的淬火速率。通过加热到足够高的温度,热历史被消除,产生的最终状态完全取决于淬火速率。
Laser thermal annealing of PS-b-PMMA is shown to modify phase segregation within the milliseconds timeframe at temperatures from the glass transition to far above the order-disorder transition temperature. We report the kinetics of phase segregation of cylinder forming PS-b-PMMA (53.8 kg/mol, fPS= 0.7) as probed by micro-beam grazing incidence small angle X-ray scattering. Structure evolution was probed as a function of peak temperature, time at temperature, and quench rate, with phase segregation readily occurring on millisecond time scales and at peak quench rates up to 107K/s. The final film morphology is dependent on both the anneal time and the quench rate to ambient. With heating to sufficiently high temperatures, the thermal history is erased yielding a final state is purely dependent on the quench rate.
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