Dinachali Saman Safari, Bai Wubin, Tu Kun-Hua, Choi Hong Kyoon, Zhang Jinshuo, Kreider Melissa E, Cheng Li-Chen, Ross Caroline A
Division of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, Singapore 487372, Republic of Singapore.
Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Republic of Singapore.
ACS Macro Lett. 2015 May 19;4(5):500-504. doi: 10.1021/acsmacrolett.5b00108. Epub 2015 Apr 17.
A combined thermal and solvent vapor annealing process for block copolymer self-assembly is demonstrated. Films of cylinder-forming poly(styrene--dimethylsiloxane) (SD45, 45.5 kg/mol, f = 31%) were preheated for 2 min above the glass transition temperature of both blocks, followed by immediate introduction into a chamber containing room temperature saturated vapors of toluene and -heptane. After quenching in air, microdomains had better order than those obtained from thermal or solvent annealing alone. The short time during which the film is both heated and exposed to solvent vapor played an important role in determining the final morphology.
展示了一种用于嵌段共聚物自组装的热退火和溶剂蒸汽退火相结合的工艺。将形成圆柱状的聚（苯乙烯-二甲基硅氧烷）（SD45，45.5 kg/mol，f = 31%）薄膜在高于两个嵌段的玻璃化转变温度下预热2分钟，然后立即放入含有甲苯和庚烷室温饱和蒸汽的腔室中。在空气中淬火后，微区的有序度比单独通过热退火或溶剂退火获得的微区更好。薄膜同时受热和暴露于溶剂蒸汽的短时间在决定最终形态方面起到了重要作用。
