Composition Effect on Interplay between Phase Separation and Dewetting in PMMA/SAN Blend Ultrathin Films
Composition Effect on Interplay between Phase Separation and Dewetting in PMMA/SAN Blend Ultrathin Films
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PMMA/SAN 共混超薄膜中相分离和反湿相互作用的成分影响
DOI：
10.1021/ma200082m
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发表时间：
2011-06
期刊：
影响因子：
5.5
通讯作者：
Li, Xiuhong
中科院分区：
文献类型：
--
作者：
You, Jichun;Liao, Yonggui;Men, Yongfeng;Shi, Tongfei;An, Lijia;Li, Xiuhong
利用原位原子力显微镜（AFM）和掠入射超小角X射线散射（GIUSAX）研究了聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯-丙烯腈（SAN）共混物在氧化硅衬底上形成的旋转膜（θ 1 Rg，回转半径）的相分离、去湿及其相互作用。结果表明，共混物的相行为主要取决于共混物的组成。首先，SAN 50和SAN 70中的去湿形态仍受Uq 0/E的控制，Uq 0/E在我们之前的工作中引入[Polymer 2009，50，4456]以区分不同的去湿途径。其中，Uq 0和E分别描述了表面波动的初始幅度和膜的初始厚度;其次，组分对组分波动的梯度产生显著影响，从而加速（或抑制）去湿;最后，这种加速或抑制影响了随后的相分离和相分离之间的相互作用。
Using in situ atomic force microscopy (AFM) and grazing incidence ultrasmall-angle X-ray scattering (GIUSAX), the composition dependence of phase separation, dewetting, and interplay between them in blend [poly(methyl methacrylate) (PMMA) and poly(styrene-ran-acrylonitrile) (SAN)] ultrathin films (∼1Rg, radius of gyration) on silicon oxide substrate was investigated. It was found that phase behaviors depended crucially on the composition in blend. First, dewetting morphologies in SAN50 and SAN70 were still under the control of Uq0/E, which was introduced in our previous work [Polymer 2009, 50, 4456] to distinguish different dewetting pathways. Here, Uq0 and E described the initial amplitude of the surface undulation and original thickness of film, respectively; second, composition produced significant influences on its gradient in composition fluctuation, resulting in the accelerated (or suppressed) dewetting; last, this kind of acceleration or suppression affected the following interplay between phase se...
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影响因子：
8.6
作者：
Sharma, A;Khanna, R
通讯作者：
Khanna, R
影响因子：
5.5
作者：
Liao, YG;Su, ZH;An, LJ
通讯作者：
An, LJ
影响因子：
3.9
作者：
Karin Wensink;B. Jérôme
通讯作者：
Karin Wensink;B. Jérôme
影响因子：
4.6
作者：
Jichun You;Shanshan Hu;Yonggui Liao;Kaixu Song;Yongfeng Men;T. Shi;L. An
通讯作者：
Jichun You;Shanshan Hu;Yonggui Liao;Kaixu Song;Yongfeng Men;T. Shi;L. An
影响因子：
4.6
作者：
B. Newby;K. Wakabayashi;R. Composto
通讯作者：
B. Newby;K. Wakabayashi;R. Composto